I've got an image editor window. After drag event I minimize my window to miniature in the bottom left corner, after drop on the miniature I return window back. Above the miniature I change cursor to operationNotAllowedCursor.
The problem is: NSWindow does not change the cursor on miniature after the first draggingEntered (after the second and more everything's fine). Moreover, after drop on the miniature NSWindow does not receive any events until a click on any area of it.
Code for minimizing window (in NSWindow subclass):
-(void)minimize
{
const double miniSize = 240;
MSDraggingMiniature *mini = [[MSDraggingMiniature alloc] init];
[mini setMiniImage:[[MSScreenMaker getInstance] makeEditorScreen:(int)[self windowNumber]]];
_mainContentView = self.contentView;
_oldFrame = [self frame];
[self setStyleMask:NSBorderlessWindowMask];
self.contentView = mini;
NSRect drect = [[self screen] frame];
double width, height;
if (self.frame.size.width < self.frame.size.height) {
height = miniSize;
width = self.frame.size.width / self.frame.size.height * miniSize;
} else {
width = miniSize;
height = self.frame.size.height / self.frame.size.width * miniSize;
}
_anima = MSEditorResizeAnimationMinimize;
[self setFrame:NSMakeRect(drect.origin.x + 20, drect.origin.y + 20 , width, height) display:YES animate:YES];
}
-(void)deminimize
{
self.contentView = _mainContentView;
[self setStyleMask:NSTitledWindowMask];
_anima = MSEditorResizeAnimationDeminimize;
[self setFrame:_oldFrame display:YES animate:YES];
[self makeKeyWindow];
[self makeMainWindow];
}
After lots of variants I found the answer. It seems that area, acting like Dragging Source, must be just NSView, not a subclass of NSButton, which I had.
I rewrote my Dragging Source class - now everything works fine.
Related
I am trying to magnify an NSScrollView which contains NSTextView and keep it centered to its content at all times. The NSTextView has left/right insets to keep the word wrapping consistent and to keep the paragraphs nicely at the center of the view.
Both [NSScrollView scaleUnitSquareToSize:...] and setMagnification:... have their own quirks and problems, but for now setMagnification seems a better option, as it is not relative.
Here's what happens (among other strange stuff):
On resizing, I update the insets:
CGFloat inset = self.textScrollView.frame.size.width / 2 - _documentWidth / 2;
self.textView.textContainerInset = NSMakeSize(inset, TEXT_INSET_TOP);
self.textView.textContainer.size = NSMakeSize(_documentWidth, self.textView.textContainer.size.height);
Zooming in:
CGFloat magnification = [self.textScrollView magnification];
NSPoint center = NSMakePoint(self.textScrollView.frame.size.width / 2, self.textScrollView.frame.size.height / 2);
if (zoomIn) magnification += .05; else magnification -= .05;
[self.textScrollView setMagnification:magnification centeredAtPoint:center];
Everything kind of works for a while. Sometimes, depending on from which window corner the window is resized, the ScrollView loses its center, and I haven't found a solution for re-centering the view of a magnified NSScrollView.
After magnification, layout constraints can get broken too when resizing the window, especially when the textContainer is clipped out of view, and the app crashes with the following error:
*** Assertion failure in -[NSISLinearExpression addVariable:coefficient:], /Library/Caches/com.apple.xbs/Sources/Foundation/Foundation-1349.91/Layout.subproj/IncrementalSimplex/NSISLinearExpression.m:716
One problem might be that I am setting the insets according to UIScrollView frame size, because the contained NSTextView's coordinates don't seem to be relative but absolute after magnification.
Is there any safe way to magnifying this sort of view and keeping it centered to its content at all times? And why are my constraints breaking?
I've run into similar problems, and unfortunately I ended up doing the centering myself. Here are some of the highlights of my solution.
needs recursion prevention! (otherwise stackoverflow :)
create a non-drawable NSView as the documentView, and then add your drawable view as a subview which is centered manually, and manually set the frame to the visibleRect of the parent.
override visibleRect, call it a second time if its invalid, and debug to make sure it is valid!
zooming layered backed views sux. You could try using an NSTiledLayer, but I've tried and abandoned that solution multiple times.
Code below:
#interface FlippedParentView : NSView
#end
#implementation FlippedParentView
- (BOOL) isFlipped { return YES; }
#end
- (void)awakeFromNib
{
[self resetMouseInfo];
[[self window] setAcceptsMouseMovedEvents:YES];
needsFullRedraw = YES;
[self setAcceptsTouchEvents:YES];
// problem: when zoomed-in, CALayer backed NSOpenGLView becomes too large
// and hurts performance.
// solution: create a fullsizeView for the NSScrollView to resize,
// and make NSOpenGLView a subview. Keep NSOpenGLView size the same as visibleRect,
// positioning it as needed on the fullsizeView.
NSScrollView *scrollvw = [self enclosingScrollView];
[scrollvw setBackgroundColor:[NSColor darkStrokeColor]];
fullsizeView = [[FlippedParentView alloc] initWithFrame: [self frame]];
[scrollvw setDocumentView:fullsizeView];
[fullsizeView setAutoresizesSubviews:NO];
//printf("mask %d\n", [self autoresizingMask]);
[fullsizeView setAutoresizingMask: NSViewHeightSizable | NSViewWidthSizable | NSViewMinYMargin | NSViewMaxYMargin | NSViewMaxXMargin | NSViewMinXMargin];
[self setAutoresizingMask: NSViewNotSizable];
[fullsizeView addSubview:self];
}
- (NSRect) visibleRect
{
NSRect visRect = [super visibleRect];
if ( visRect.size.width == 0 )
{
visRect = [[self superview] visibleRect];
if ( visRect.size.width == 0 )
{
// this jacks up everything
DUMP( #"bad visibleRect" );
}
visRect.origin = NSZeroPoint;
}
return visRect;
}
- (void) _my_zoom: (double)newZoom
{
mouseFocusPt = [self focusPt];
NSRect oldVisRect = [[self superview] visibleRect];
if ( newZoom < 1.0 )
newZoom = 1.0;
if ( newZoom > kZoomFactorMax ) newZoom = kZoomFactorMax;
float xpct = (mouseFocusPt.x - oldVisRect.origin.x) /
( NSMaxX(oldVisRect) - oldVisRect.origin.x );
float ypct = (mouseFocusPt.y - oldVisRect.origin.y) /
( NSMaxY(oldVisRect) - oldVisRect.origin.y );
float oldZoom = zoomFactor;
zoomFactor = newZoom;
/////////////////////////////////////////////////////////////////////////////////////////////////////
// Stay locked on users' relative mouse location, so user can zoom in and back out without
// the view scrolling out from under the mouse location.
NSPoint newFocusPt = NSMakePoint (mouseFocusPt.x * newZoom/oldZoom,
mouseFocusPt.y * newZoom/oldZoom) ;
NSRect myFrame = fullsizeFrame; // [self frame];
float marginPercent = (myFrame.size.height - drawableSizeWithMargins.height) / drawableSizeWithMargins.height;
[self updateContext];
NSRect newVisRect;
newVisRect.size = [self visibleRect].size;
newVisRect.origin.x = (newFocusPt.x) - (xpct * newVisRect.size.width);
//DLog( #"xpct %0.2f, zoomFactor %0.2f, newVisRect.origin.x %0.2f", xpct, zoomFactor, newVisRect.origin.x);
myFrame = fullsizeFrame; // [self frame];
float marginPercent2 = (myFrame.size.height - drawableSizeWithMargins.height) / drawableSizeWithMargins.height;
float marginDiff = (marginPercent - marginPercent2) * drawableSizeWithMargins.height;
newVisRect.origin.y = (newFocusPt.y ) - (ypct * newVisRect.size.height) - marginDiff;
//DLog( #"ypct %0.2f, zoomFactor %0.2f, newVisRect.origin.y %0.2f", ypct, zoomFactor, newVisRect.origin.y);
//DLog( #"marginPercent %0.2f newVisRect %#", marginPercent, NSStringFromRect(newVisRect) );
if ( newVisRect.origin.x < 1 ) newVisRect.origin.x = 1;
if ( newVisRect.origin.y < 1 ) newVisRect.origin.y = 1;
// NSLog( #"zoom scrollRectToVisible %# bounds %#", NSStringFromRect(newVisRect), NSStringFromRect([[self superview] bounds]) );
// if ( iUseMousePt || isSlider )
[[self superview] scrollRectToVisible:newVisRect];
}
// - zoomFactor of 1.0 is defined as the zoomFactor needed to show entire selected context within visibleRect,
// including margins of 5% of the context size
// - zoomFactor > 1.0 will make pixels look bigger (view a subsection of a larger total drawableSize)
// - zoomFactor < 1.0 will make pixels look smaller (selectedContext size will be less than drawableSize)
-(void)updateContext
{
static BOOL sRecursing = NO;
if ( sRecursing ) return; // prevent recursion
sRecursing = YES;
//NSRect scrollRect = [[self superview] frame];
NSRect clipViewRect = [[[self enclosingScrollView] contentView] frame];
NSRect visRect = [[self superview] visibleRect]; // careful... visibleRect is sometimes NSZeroRect
float layoutWidth = clipViewRect.size.width;
float layoutHeight = clipViewRect.size.height;
marginPct = layoutHeight / (layoutHeight - (overlayViewMargin*2) );
// Satisfy the constraints fully-zoomed-out case:
// 1) the drawable rect is centered in the view with at margins.
// Allow for 5% margins (1.025 = 2.5% left, right, top, bottom)
// 2) guarantee the drawable rect does not overlap the mini-map in upper right corner.
NSRect baseRect = NSZeroRect;
baseRect.size = visRect.size;
NSRect drawableBaseRect = getCenteredRectFloat(baseRect, metaUnionRect.size );
//drawableSizeWithMargins = nsIntegralSize( nsScaleSize( drawableBaseRect.size, zoomFactor ) );
drawableSizeWithMargins = nsScaleSize( drawableBaseRect.size, zoomFactor );
// drawableSize will NOT include the margins. We loop until we've satisfied
// the constraints above.
drawableSize = drawableSizeWithMargins;
do
{
NSSize shrunkSize;
shrunkSize.width = layoutWidth / marginPct;
shrunkSize.height = layoutHeight / marginPct;
//drawableSize = nsIntegralSize( nsScaleSize( drawableBaseRect.size, zoomFactor / marginPct ));
drawableSize = nsScaleSize( drawableBaseRect.size, zoomFactor / marginPct );
[self calculateMiniMapRect]; // get approx. size. Will calculate once more below.
NSRect shrunkRect = getCenteredRectNoScaling(baseRect, shrunkSize );
// DLog( #"rough miniMapRect %# shrunk %#", NSStringFromRect(miniMapRect), NSStringFromRect(shrunkRect));
// make sure minimap doesn't overlap drawable when you scroll to top-left
NSRect topMiniMapRect = miniMapRect;
topMiniMapRect.origin.x -= visRect.origin.x;
topMiniMapRect.origin.y = 0;
if ( !NSIntersectsRect( topMiniMapRect, shrunkRect ) )
{
topMarginPercent = fabs(shrunkRect.origin.y - drawableBaseRect.origin.y) / baseRect.size.height;
break;
}
float topMarginOffset = shrunkRect.size.height + (baseRect.size.height * 0.025);
shrunkRect.origin.y = NSMaxY(baseRect) - topMarginOffset;
if ( !NSIntersectsRect( topMiniMapRect, shrunkRect ) )
{
topMarginPercent = fabs(shrunkRect.origin.y - drawableBaseRect.origin.y) / baseRect.size.height;
break;
}
marginPct *= 1.025;
} while (1);
fullsizeFrame.origin = NSZeroPoint;
fullsizeFrame.size.width = fmax(drawableSizeWithMargins.width, layoutWidth);
fullsizeFrame.size.height = fmax(drawableSizeWithMargins.height, layoutHeight);
[fullsizeView setFrame:fullsizeFrame];
NSRect myNewFrame = [fullsizeView visibleRect];
if (myNewFrame.size.width > 0)
[self setFrame: myNewFrame]; //NSView
sRecursing = NO;
}
I'm having a bit of difficulty getting a NSSplitView to behave itself.
What I have at the moment is:
NSWindow
NSView
NSSplitView
navView <NSView>
contentView <NSView>
The problem I'm having is with the splitter shifting position when I resize the window.
In the split view delegate I've already got:
-(CGFloat)splitView:(NSSplitView *)splitView constrainMaxCoordinate:(CGFloat)proposedMaximumPosition ofSubviewAt:(NSInteger)dividerIndex{
return 200;
}
-(CGFloat)splitView:(NSSplitView *)splitView constrainMinCoordinate:(CGFloat)proposedMinimumPosition ofSubviewAt:(NSInteger)dividerIndex{
return 200;
}
Despite this the splitter still moved when I resize the window.
if I click ont he splitter, it snaps back to 200px as it should. How can I stop this from moving?
I've tried Autolayout, which is a bit of a nightmare to use, so I've literally disabled it and manually tried to do it with no joy..
Any ideas?
I wrote the above code for Swift and extended it with the possibility to define, whether the left or the right view has to be preferred:
var preferringLeftSideOfSplitView = true
func splitView(splitView: NSSplitView, resizeSubviewsWithOldSize oldSize: NSSize) {
var dividerThickness = splitView.dividerThickness
var leftRect = splitView.subviews[0].frame
var rightRect = splitView.subviews[1].frame
// Resizing and placing the left view
splitView.subviews[0].setFrameOrigin(NSMakePoint(0, 0))
if self.preferringLeftSideOfSplitView == true {
splitView.subviews[0].setFrameSize(NSMakeSize(leftRect.width, splitView.frame.size.height))
} else {
splitView.subviews[0].setFrameSize(NSMakeSize(splitView.frame.size.width - rightRect.width - dividerThickness, splitView.frame.size.height))
}
// Resizing and placing the right view
if self.preferringLeftSideOfSplitView == true {
splitView.subviews[1].setFrameOrigin(NSMakePoint(leftRect.size.width + dividerThickness, 0))
splitView.subviews[1].setFrameSize(NSMakeSize(splitView.frame.size.width - leftRect.size.width - dividerThickness, splitView.frame.size.height))
} else {
splitView.subviews[1].setFrameOrigin(NSMakePoint(splitView.frame.size.width - rightRect.width, 0))
splitView.subviews[1].setFrameSize(NSMakeSize(rightRect.size.width, splitView.frame.size.height))
}
}
I've worked it out...
-(void)splitView:(NSSplitView *)sender resizeSubviewsWithOldSize:(NSSize)oldSize
{
CGFloat dividerThickness = [sender dividerThickness];
NSRect leftRect = [[[sender subviews] objectAtIndex:0] frame];
NSRect rightRect = [[[sender subviews] objectAtIndex:1] frame];
NSRect newFrame = [sender frame];
leftRect.size.height = newFrame.size.height;
leftRect.origin = NSMakePoint(0, 0);
rightRect.size.width = newFrame.size.width - leftRect.size.width
- dividerThickness;
rightRect.size.height = newFrame.size.height;
rightRect.origin.x = leftRect.size.width + dividerThickness;
[[[sender subviews] objectAtIndex:0] setFrame:leftRect];
[[[sender subviews] objectAtIndex:1] setFrame:rightRect];
}
- (BOOL)splitView:(NSSplitView *)aSplitView shouldAdjustSizeOfSubview:(NSView *)subview
{
return subview == rightView;
}
add this to your delegate.
if your NSSplitView would contain lefView and rightView, this keeps leftView at a fixed width, and rightView will resize, when resizing the main window.
EDIT:
I uploaded my implementation to github. Maybe it is better to understand what I want and what my problem is.
I changed the code in the github project a little bit than the posted code here. I think the implementation in the github project is better, but not perfect.
What I want to do:
Have a UIScrollView with movable UIViews (e.g. Images). The user can pan this subviews and zoom in and out. When the user zooms in and moves a subview over the current visible area the scrollView should automatically scroll. As lang as the subview is over the edge the scrollview should scroll. When the subview isn't over the visible area anymore the scrollview should stop moving.
I try to explain my problem as good as possible.
What I have managed to do:
Zoom the scrollview, move the subviews with the UIPanGestureRecognizer, recognize when the subview is over the visible area and start moving (changing the contentOffset) the scrollview. Here I using a NSTimer to move the scrollview as long as the subview is over the visible area.
My problem:
When the subview is over the visible area a NSTimer is started, to change the contentOffset of the subview and the frame (position) of the subview.
After that I can't pan the subview anymore.
I can't figure out how to implement the pan gesture with changing the subview frame in a correct way.
My implementation:
I am using three views:
UIScrollView
MyImageContainerView (UIView, added as a subview to the scrollview)
MyImageView (UIView, added as a subview to MyImageContainerView)
Currently MyImageContainerView manages the workflow. A MyImageView has a UIPanGestureRecognizer attached. The method for this recognizer is implemented in MyImageContainerView:
- (void)handlePanGesture:(UIPanGestureRecognizer *)gestureRecognizer
{
//UIView which is moved by the user
MyImageView *currentView = gestureRecognizer.view;
switch (gestureRecognizer.state)
{
case UIGestureRecognizerStatePossible:
{
break;
}
case UIGestureRecognizerStateBegan:
{
//save both values in global instance variables
currentFrameOriginX = currentView.frame.origin.x;
currentFrameOriginY = currentView.frame.origin.y;
//global BOOL variable, to check if scrollView movement is performed
scrolling = NO;
break;
}
case UIGestureRecognizerStateChanged:
{
CGRect rect = CGRectMake(currentFrameOriginX + [gestureRecognizer translationInView:currentView.superview].x, currentFrameOriginY + [gestureRecognizer translationInView:currentView.superview].y, currentView.frame.size.width, currentView.frame.size.height);
if (CGRectContainsRect(currentView.superview.frame, rect)) {
/*PROBLEM: Here is a problem. I need this change of the frame here, to move the UIView along the movement from the user. In my autoScroll-method I have to set the frame of currentView, too. But I can't set the frame of currentView here and in the autoScroll. But as long as the NSTimer runs and is calling autoScroll: this if-statement isn't called, so I can't move the UIView with my finger anymore. */
if (!scrolling) {
//currently the NSTimer method for the automatically scrolling isn't performed, so:
//change the frame according to the pan gesture
currentView.frame = rect;
}
UIScrollView *scrollView = self.myScrollView; //reference to the "root" UIScrollView
CGRect visibleRect;
visibleRect.origin = scrollView.contentOffset;
visibleRect.size = scrollView.bounds.size;
CGRect frame = currentView.frame;
CGFloat scale = 1.0 / scrollView.zoomScale;
visibleRect.origin.x *= scale;
visibleRect.origin.y *= scale;
visibleRect.size.width *= scale;
visibleRect.size.height *= scale;
CGSize scrollZone = CGSizeMake(10.0f, 10.0f);
float scrollStep = 3.0f;
CGPoint scrollAmount = CGPointZero;
//determine the change of x and y
if (frame.origin.x+scrollZone.width < visibleRect.origin.x) {
scrollAmount.x = -scrollStep;
}
else if((frame.origin.x+frame.size.width)-scrollZone.width > visibleRect.origin.x + visibleRect.size.width) {
scrollAmount.x = scrollStep;
}
else if (frame.origin.y+scrollZone.height < visibleRect.origin.y) {
scrollAmount.y = -scrollStep;
}
else if((frame.origin.y+frame.size.height)-scrollZone.height > visibleRect.origin.y + visibleRect.size.height) {
scrollAmount.y = scrollStep;
}
if ((scrollAmount.x != 0) | (scrollAmount.y != 0)) {
if (![scrollTimer isValid]) {
//scrollTimer is a global NSTimer instance variable
[scrollTimer invalidate];
scrollTimer = nil;
NSString *scrollString = NSStringFromCGPoint(scrollAmount);
NSDictionary *info = [NSDictionary dictionaryWithObjectsAndKeys:scrollString, #"scrollString", currentView, #"currentView", nil];
scrollTimer = [[NSTimer alloc]initWithFireDate:[NSDate date] interval:0.03f target:self selector:#selector(autoScroll:) userInfo:info repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:scrollTimer forMode:NSRunLoopCommonModes];
}
}
else {
[scrollTimer invalidate];
scrollTimer = nil;
scrolling = NO;
}
}
break;
}
case UIGestureRecognizerStateEnded:
{
//quite know the scrolling should stop, maybe it would be better when the scrollView scrolls even if the user does nothing when the subview is over the visible area
[scrollTimer invalidate];
scrollTimer = nil;
scrolling = NO;
break;
}
default:
{
[scrollTimer invalidate];
scrollTimer = nil;
scrolling = NO;
break;
}
}
}
-(void)autoScroll:(NSTimer*)timer {
scrolling = YES; //the scroll method is executed quite know
NSDictionary *info = [timer userInfo];
UIScrollView *scrollView = self.myScrollView;
CGRect visibleRect;
visibleRect.origin = scrollView.contentOffset;
visibleRect.size = scrollView.bounds.size;
CGPoint scrollAmount = CGPointFromString([info objectForKey:#"scrollString"]);
MyImageView *currentView = [info objectForKey:#"currentView"];
//stop scrolling when the UIView is at the edge of the containerView (referenced over 'self')
if ((currentView.frame.origin.x <= 0 | currentView.frame.origin.y <= 0) ||
((currentView.frame.origin.x+currentView.frame.size.width) > self.frame.size.width | (currentView.frame.origin.y+currentView.frame.size.height) > self.frame.size.height)
) {
scrolling = NO;
return;
}
//move the UIView
CGFloat scale = 1.0 / scrollView.zoomScale;
if (scrollAmount.x != 0) {
scrollAmount.x *= scale;
}
if (scrollAmount.y != 0) {
scrollAmount.y *= scale;
}
CGRect frame = currentView.frame;
frame.origin.x += scrollAmount.x;
frame.origin.y += scrollAmount.y;
currentView.frame = frame;
currentFrameOriginX = currentView.frame.origin.x;
currentFrameOriginY = currentView.frame.origin.y;
//move the scrollView
CGPoint contentOffset = scrollView.contentOffset;
contentOffset.x += scrollAmount.x;
contentOffset.y += scrollAmount.y;
[scrollView setContentOffset:contentOffset animated:NO];
}
I have a scroll view with some content. After loading the contents I am using the following code to move to the top of the scroll view
[scrollViewCustom setContentOffset:CGPointMake(0.0, 0.0) animated:NO];
It works. With one exception :
I have a UITextView. If I add some text to it, then the scroll view never goes back to the top with this code. I have to manually scroll to the top.
I have even tried to put the same code after adding text to the UITextView.
Can anyone kindly help out ? Thanks.
NB:So, heres the solution :
Basically UITextView derives from UIScrollView and as such, whenever there is some text there, it tries to scroll to make the text visible. I have replaced UITextView to UILabel and it works like a charm !
Instead of
[scrollViewCustom setContentOffset:CGPointMake(0.0, 0.0) animated:NO];
Use
[scroll scrollRectToVisible:CGRectMake(0,0, 100,100) animated:NO];
- (void)viewDidLoad{
scroll.contentSize=CGSizeMake(320, 400);
}
- (void)scrollViewToCenterOfScreen:(UIView *)theView {
CGFloat viewCenterY = theView.center.y;
CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
CGFloat availableHeight;
availableHeight = applicationFrame.size.height - 300;
CGFloat z = viewCenterY - availableHeight / 2.0;
if (z < 0) {
z = 0;
}
[scroll setContentOffset:CGPointMake(0, z) animated:YES];
}
-(void)textViewDidBeginEditing:(UITextView *)textView{
[self scrollViewToCenterOfScreen:scroll];
}
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
if (range.length==0) {
[scroll setContentOffset:CGPointMake(0, 0) animated:YES];
return NO;
}
}
Just two steps:
// define the area that is initially visible
scrollViewCustom.frame = CGRectMake(0, 5, 354, 500);
// then define how much a user can scroll it
[scrollViewCustom setContentSize:CGSizeMake(354, 960)];
In addition,clear the background color of scroll view to show the text.
scrollViewCustom.backgroundColor = [UIColor clearColor];
I suppose it's not strictly in line with Apple guidelines but I guess it must be possible somehow. I'd like to change the height of navigation bar inside UINavigationController and the height of UIBarButtonItem elements inside that bar.
Using a trick from this question I managed to change the height of navigation bar but I can see no way of adjusting the height of bar button items.
If anyone knows how to change the size of bar button items, please help me out.
This is my solution. It works very well.
#interface UINavigationBar (CustomHeight)
#end
#implementation UINavigationBar (CustomHeight)
- (CGSize)sizeThatFits:(CGSize)size {
// Change navigation bar height. The height must be even, otherwise there will be a white line above the navigation bar.
CGSize newSize = CGSizeMake(self.frame.size.width, 40);
return newSize;
}
-(void)layoutSubviews {
[super layoutSubviews];
// Make items on navigation bar vertically centered.
int i = 0;
for (UIView *view in self.subviews) {
NSLog(#"%i. %#", i, [view description]);
i++;
if (i == 0)
continue;
float centerY = self.bounds.size.height / 2.0f;
CGPoint center = view.center;
center.y = centerY;
view.center = center;
}
}
Maybe this tutorial about a customized navbar will help you: Recreating the iBooks wood themed navigation bar
If you create a BarButtonItem with a UIImageView you can maybe change the framesize/boundsize of the custom UIImageView
UIImageView* imageView = [[[UIImageView alloc] initWithFrame:navigationController.navigationBar.frame] autorelease];
imageView.contentMode = UIViewContentModeLeft;
imageView.image = [UIImage imageNamed:#"NavBar-iPhone.png"];
[navigationController.navigationBar insertSubview:imageView atIndex:0];
So for your need you would give the -initWithFrame method appropriate values.
static CGFloat const CustomNavigationBarHeight = 74;
#implementation WTNavigationBar
- (CGSize)sizeThatFits:(CGSize)size{
size.width = 1024;
size.height = CustomNavigationBarHeight;
return size;
}
-(void)layoutSubviews {
[super layoutSubviews];
for (UIView *view in self.subviews) {
SFLog(#"view.class=%#",[view class]);
if ([view isKindOfClass:NSClassFromString(#"UINavigationItemButtonView")]) {
float centerY = self.bounds.size.height / 2.0f;
CGPoint center = view.center;
center.y = centerY;
view.center = center;
}
}
}
#end
in my iPad app,which has a fixed landscape orientation,I found I have to hardcode the size's width
I managed to do something similar by subclassing UINavigationBar and overriding -layoutSubviews. The code looks like:
-(void)layoutSubviews {
[super layoutSubviews];
int i = 0;
for (UIView *view in self.subviews) {
NSLog(#"%i. %#", i++, [view description]);
if ([view isKindOfClass:NSClassFromString(#"UINavigationButton")]) {
view.frame = CGRectMake(0, 0, 100, 50);
}
}
}
If you need to know how to subclass UINavigationBar, have a look at this very good answer.
I am not really sure about the NSClassFromString(#"UINavigationButton")] part. It works, but I did this as an experiment, and I'm not sure if this will get approved by Apple. I hope someone with a better knowledge might shed some light.
For the UINavigationbar
In iOS SDK 4.3 and beyond, there is a way (hack) to change the height of the UINavigationBar.
To change the height of UINavigationController, change its frame size in viewWillAppear:animated: function. Then, the height will stay customized throughout whole app.
For the UIBarButtonItems
I've actually run into this myself and the only thing I could come up with was leveraging initWithCustomView and passing in a UIButton with a defined frame.
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
/*
* Insert button styling
*/
button.frame = CGRectMake(0, 0, width, height);
UIBarButtonItem *barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
Otherwise UIBarButtonItem only has a width property that can be set but unfortunately not a height property. Another nifty thing I've done with initWithCustomView is to pass in a toolbar with a button and other things like activity indicators. Hope this helps.
How badly do you want this? And, how thin (or thick) do you want to make your navbar?
One approach would be to set the transform of the navbar to scale and translate it. If you scale it too much the title and button text will look wonky, but if you only need to shave a few pixels you might be allright.
Here's the result of scaling it to be 75% of full height (33 pixels tall):
And the code that produced this:
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.title = #"Thin Navigation Bar";
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle: #"Press Me" style:UIBarButtonItemStyleBordered target: nil action: NULL ] autorelease];
CGFloat scale = .75;
CGFloat cy = 44.0 - ( 44.0 * scale );
self.navigationController.navigationBar.transform = CGAffineTransformScale( CGAffineTransformMakeTranslation( 0, -cy / 2.0 ), 1.0, scale ) ;
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
CGFloat scale = .75;
CGFloat cy = 44.0 - ( 44.0 * scale );
CGRect r = self.view.frame;
r.origin.y -= cy;
r.size.height += cy;
self.view.frame = r;
}
Now, this does have a number of problems, which may or may not be solvable. #1 is that you're fighting with the UINavigationController to size and position the navbar and the view-controller views. Animating between view controllers that use this technique is likely going to look weird.
I'd be curious if you could solve the related issues...
One last thought: If you dont use a UINavigationController then there really aren't a whole lot of issues with this other than squished text. Or, you could use a navigation controller but hide the default navbar, and add the thin navbar to each of your child-view controller views. You could even subclass UINavigationBar and set the transform from within:
#interface TSThinNavBar : UINavigationBar
{
}
#end
#implementation TSThinNavBar
// assuming we'll always be constructed from a nib
- (id) initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder: aDecoder];
if ( self != nil )
{
CGFloat scale = .75;
CGFloat cy = 44.0 - ( 44.0 * scale );
self.transform = CGAffineTransformScale( CGAffineTransformMakeTranslation( 0, -cy / 2.0 ), 1.0, scale ) ;
}
return self;
}
#end