I am having a weird issue. I have a split view controller and in the detail view I have a scroll view. Inside the scroll view I have a lavel with some information.
When the application first opens in landscape, the scroll view is always placed 1/2 way down the view of the detail view. When I touch an item in the root view and the next view shows, then I return to the scroll view, the scroll view is in the correct place (10,10).
I have set the frame of the scroll view in the viewWillAppear method of the detail view. Here is my code:
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
if (([[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationPortrait) ||
([[UIApplication sharedApplication] statusBarOrientation] == UIInterfaceOrientationPortraitUpsideDown)) {
[self setPortrait];
CGRect tmpR = [self.view frame];
NSLog(#"The Detail View Controller Portrait view: width: %f height: %f",tmpR.size.width, tmpR.size.height);
} else {
[self setLandscape];
CGRect tmpR = [self.view frame];
NSLog(#"The Detail View Controller Portrait view: width: %f height: %f",tmpR.size.width, tmpR.size.height);
}
// show the front page message....
[self setMessage:kDetailViewMessage];
// make sure the scroll is at the top....
[scrollView setContentOffset:CGPointMake(0, 0)];
}
-(void)setLandscape {
// set the proper scroll view size...
CGRect navigationBarFrame = self.navigationController.navigationBar.frame;
CGRect detailWindowFrame = splitView.detailViewController.view.frame;
CGRect sframe = CGRectZero;
sframe.origin = CGPointMake(10, 10 + navigationBarFrame.size.height);
sframe.size = CGSizeMake(detailWindowFrame.size.width - 20, detailWindowFrame.size.height - 20);
[self.scrollView setFrame:sframe];
[detailDescriptionLabel setFrame:CGRectMake(0, 0, sframe.size.width, sframe.size.height)];
[detailDescriptionLabel sizeToFit];
}
Right now the application will only display in landscape and the setPortrait function is not called.
This has been driving me crazy for a few hours now..... Any ideas?
I think you need to set the bounds origin of the content view, not the frame. (That's how it works for NSScrollView, anyway.)
Related
I am working on Scroll View with gestures. I added a UIView in Scroll View whose size is equal to the ScrollView content size. I want to apply the pinch gesture and rotate gesture on the View which is subview of ScrollView. I have done the work of the pinch gesture by using zoom property and delegate of the ScrollView which give me same effect which I want. But Rotation Gesture is creating Problem. When I add rotation gesture on the view then zooming of the scroll view also get disturb.
So how can i apply the pinch gesture and Rotate gesture on the Scroll View's subview whose size must be equal to the content size of the ScrollView initially.
Can anybody give me the way to do this!
This is the code of .m file, when we rotate the view it become invisible
#import "ViewController.h"
#interface ViewController ()
{
UIView *backgroundView;
UIScrollView *scrollView;
CGFloat lastRotation;
}
#end
#implementation ViewController
-(void)loadView
{
[super loadView];
//Scroll View
scrollView = [[UIScrollView alloc] initWithFrame:self.view.frame];
scrollView.contentSize = self.view.frame.size;
scrollView.delegate = self;
scrollView.backgroundColor = [UIColor grayColor];
//Zooming factors of the Scroll View
scrollView.minimumZoomScale = 1.0;
scrollView.maximumZoomScale = 5.0f;
scrollView.zoomScale = 1.0;
[self.view addSubview:scrollView];
//Scroll View's subview
backgroundView = [[UIView alloc] initWithFrame:scrollView.frame];
[backgroundView setBackgroundColor:[UIColor orangeColor]];
[scrollView addSubview:backgroundView];
UIRotationGestureRecognizer *bgRotationGstr = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(rotateBackgroundView:)];
bgRotationGstr.delegate = self;
bgRotationGstr.cancelsTouchesInView = NO;
[backgroundView addGestureRecognizer:bgRotationGstr];
//Child of background view
UIView *childView = [[UIView alloc] initWithFrame:CGRectMake(20, 50, 100, 100)];
childView.backgroundColor = [UIColor grayColor];
[backgroundView addSubview:childView];
}
//Rotation of the background view
-(void)rotateBackgroundView:(UIRotationGestureRecognizer*)gesture
{
CGFloat rotation = 0.0 - (lastRotation - [(UIRotationGestureRecognizer*)gesture rotation]);
CGAffineTransform currentTransform = backgroundView.transform;
CGAffineTransform newTransform = CGAffineTransformRotate(currentTransform,rotation);
[backgroundView setTransform:newTransform];
lastRotation = [(UIRotationGestureRecognizer*)gesture rotation];
if (gesture.state == UIGestureRecognizerStateBegan || gesture.state == UIGestureRecognizerStateChanged)
{
scrollView.scrollEnabled = NO;
}
else if (gesture.state == UIGestureRecognizerStateEnded)
{
lastRotation = 0.0;
scrollView.scrollEnabled = YES;
return;
}
}
#pragma mark<UIScrollViewDelegate>
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return backgroundView;
}
#pragma mark<UIGetsureRecognizer>
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
return YES;
}
#end
After many days of struggling I found a definitive solution in order to use UIScrollView integrated zoom behavior together with UIRotationGestureRecognizer working like a charm. You have to add a container dummy view as subview of the scroll view, and put the UIImageView as subview of the container view. Afterthat, return the container view in the viewForZoomingInScrollView method and add the UIRotationGestureRecognizer to the scrollview, applying CGAffineTransformRotate to the UIImageView. Finally, return true in the shouldRecognizeSimultaneouslyWithGestureRecognizer method. In this way the scrollView will capture both the two fingers rotation gesture and the pinch to zoom gesture: the zoom will be applied to the dummy view and rotation to the uiimageview, without conflicts between transformations.
In code: let's think to have a UIViewController presenting a UIScrollView. We want to use scrollview's zoom behaviour out of the box together with UIImageView rotation.
1) The controller (or any other object) containing UIScrollView must conforms to UIGestureRecognizerDelegate protocol.
In myViewController.h
#interface myViewController : UIViewController < UIGestureRecognizerDelegate> {
}
2) Create a UIScrollView, add a dummy view as subview and finally add a UIImageView as subview of the dummy view.
In myViewController.m
//Scrollview
myScrollView=[[UIScrollView alloc] initWithFrame:CGRectMake(0,0, view.frame.size.width, view.frame.size.height)];
myScrollView.delegate=self;
[view addSubview:myScrollView];
//Dummy View
UIView *dummyView=[[UIView alloc] initWithFrame:CGRectMake(0, 0, myScrollView.frame.size.width, myScrollView.frame.size.height)];
[self addSubview:dummyView];
//ImageView
imageView=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, dummyView.frame.size.width, dummyView.frame.size.height)];
imageView.contentMode=UIViewContentModeScaleAspectFit;
[dummyView addSubview:imageView];
//Add rotation gesture to the scrollView
rotationGestureRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:#selector(handleRotate:)];
[myScrollView addGestureRecognizer:_rotationGestureRecognizer];
//Set the controller as delegate of the recognizer
rotationGestureRecognizer.delegate=self;
[...]
#pragma UIScrollViewDelegate
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
//Set the dummy view (imageview's superview) as view for zooming
return imageView.superview;
}
[...]
#pragma Mark - UIGestureRecognizerDelegate
- (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
//Make it possibile to recognize simultaneously pinch and rotation gestures
return TRUE;
}
[...]
- (IBAction) handleRotate:(UIRotationGestureRecognizer*)recognizer {
//Apply the rotation to imageView
imageView.transform = CGAffineTransformRotate(imageView.transform, recognizer.rotation);
recognizer.rotation = 0;
}
For simplyfing purposes, I wrote everything in the same controller. You are free to subclass the UIScrollView. Remember that the tricks are:
1) returning the container dummy view as viewForZoomingInScrollView so zoom will affect the container view and rotation will affect the uiimageview.
2) set the viewcontroller containing the scrollview as delegate of the rotation gesture recognizer and return TRUE for shouldRecognizeSimultaneouslyWithGestureRecognizer.
Add this to your .m
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}
Also make sure you dont have exclusive touch enabled on any gesture recognizers.
Try to put you scalable/rotatable content in a subview of your content view. ( Maybe you must set the "clip content" property of your content view to true - not sure )
This way the scrollview is not concerned anymore by transformations, since its content view stays still.
If you have to display the clipped content ( if you rotate a square, for example, the corners go out the initial area), recompute your content view and update the scrollview.
Since you gave the code, I suggest to try:
//Scroll View's subview
backgroundViewHolder = [[UIView alloc] initWithFrame:scrollView.frame];
[backgroundViewHolder setBackgroundColor:[UIColor orangeColor]];
[scrollView backgroundViewHolder];
//Holder View's subview
backgroundView = [[UIView alloc] initWithFrame:backgroundViewHolder.bounds];
[backgroundViewHolder addSubview:backgroundView];
Everything else should remain the same. This is just an idea... Not sure it is the right answer.
Add this to your implement file, make it a UIGestureRecognizerDelegate.
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;
}
rotationGeustureRecognozier.delegate = self;// (the implement file)
I have an iPad app with split view controller.
I want to programmaticaly create and add subview to detailViewController in right bottom corner. To do that i try to get frame of detailView (app support autorotation, so that position not static)
i do next
in viewWillAppear for detailView i try to get frame and calculate position i need
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
CGRect btnRect = self.view.frame;
//it always return 1024*748 width and height
//even in landscape mode
//when as i think must return 1024-321=703*748 pxls
//where is my mistake? How i can get actual frame
//dimensions for detailViewController in landscape orientation
btnRect.origin.y = btnRect.size.height - 42;
btnRect.origin.x = btnRect.size.width - 42;
btnRect.size.height = 42;
btnRect.size.width = 42;
UIButton* btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setBackgroundImage:someimage forState:UIControlStateNormal];
[[btn layer] setFrame:btnRect];
[self.view addSubview:btn];
}
But it always show me that detailView frame has 1024*748 dimensions. When in landscape mode i think it must be 703*748. What i need to do to get actual detailView frame?
You should want to change the frame of the view in the shouldAutorotateToInterfaceOrientation method.
An example:
(This one will adjust scrollView2 to fit its new orientation (88 pixels lower then the mainview))
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
if (interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) {
// Portrait
self.scrollView2.frame = CGRectMake(0, 88, [UIScreen mainScreen].bounds.size.width, self.view.frame.size.height - 88);
[self drawContent];
}
else {
// Landscape
self.scrollView2.frame = CGRectMake(0, 88, [UIScreen mainScreen].bounds.size.height, self.view.frame.size.width);
[self drawContent];
}
return YES;
}
I have several UIViews added as subViews to my main view controller. The way I have the views laid out looks fine in portrait mode, however, when it is tilted in to landscape mode, the bottom parts of the subviews gets cut off. I figured if I set the height of the frame, it would allow the screen to scroll and thus reveal the parts of the subViews that were cut off - but it doesn't.
- (void)didRotate:(NSNotification *)notification {
UIDeviceOrientation orientation = [[notification object] orientation];
if (orientation == UIDeviceOrientationLandscapeLeft) {
self.view.frame = CGRectMake(0.0, 0.0, 1024.0, maxHeight);
} else if (orientation == UIDeviceOrientationLandscapeRight) {
self.view.frame = CGRectMake(0.0, 0.0, 1024.0, maxHeight);
}
}
I also tried adding a UIScrollView to the main view, then adding the afore mentioned subViews to the scrollView
- (void)viewDidLoad
{
scrollView = [[UIScrollView alloc] initWithFrame:self.view.frame];
[self.view addSubview:scrollView];
//add views to scrollView
[super viewDidLoad];
}
How can I make the main view "scroll" if the sub-views exceed the screen size?
After you add your views to the scroll view, you must set the contentSize property of the scroll view so that the scroll view knows there's content to be scrolled to.
This site really is awesome.
I have what is hopefully a simple question this time. I would like to pass any scrolling input from the user (could be wheel, touchpad, etc) to an NSScrollView which contains my own subviews.
At the moment if the user scrolls just on the documentView (outside of my subviews' frames) the scroll works normally but if they scroll while the cursor is over a subview nothing happens. So basically I'd like to have the subview recognise the scroll event and pass it back to the scroll view.
Any help is greatly appreciated.
Cheers.
EDIT:
Here is the code I'm using to add the subviews to the documentView
_milestoneView and _activityView are both NSView subclasses which have a corresponding nib (created with instantiateNibWithOwner and objects hooked up accordingly) they contain a NSTextField, PXListView and some have a NSProgressIndicator.
-(void)useProject:(NSNumber *)projectId
{
[self resetView];
NSRect bounds = [[self view] bounds];
NSRect defaultFrame = NSMakeRect(20, NSMaxY(bounds)-93, NSMaxX(bounds)-20, 50);
//Prepare the milestone view
if (_milestoneView == nil)
_milestoneView = [MilestoneView milestoneViewFromNibWithFrame:defaultFrame withProject:[BCLocalFetch projectForId:projectId]];
[_milestoneView reloadList];
//Prepare the activity view
if (_activityView == nil)
_activityView = [ActivityView activityViewFromNibWithFrame:defaultFrame withProject:[BCLocalFetch projectForId:projectId]];
[self refresh];
}
I then use the refresh method to reposition them as the content sizes vary so I wanted to have a separate method.
-(void)refresh
{
//Position the milestones first
[_milestoneView setFrameOrigin:NSMakePoint(20, NSMaxY([[self view] bounds])-[_milestoneView frame].size.height-60)];
if ([[_milestoneView milestones] count] > 0)
[[self view] addSubview:_milestoneView];
//Now the activity view
[_activityView setFrameOrigin:NSMakePoint(20, [_milestoneView frame].origin.y-[_activityView frame].size.height-20)];
[[self view] addSubview:_activityView];
[self autosizeView];
}
-(void)autosizeView
{
//Resize the view to accommodate all subviews
NSRect oldFrame = [[self view] frame];
CGFloat lastY = [_activityView frame].origin.y;
if (lastY < 0) {
CGFloat newHeight = oldFrame.size.height + (-lastY);
[[self view] setFrameSize:NSMakeSize(oldFrame.size.width, newHeight)];
}
[[NSNotificationCenter defaultCenter] postNotificationName:#"BBContentDidResizeNotification" object:self];
}
Ok so I came back to the issue and finally got it worked out. The implementation was actually quite simple.
I added a property to PXListView to point to the NSScrollView that is to be scrolled.
I then implemented NSResponder's scrollWheel: method like this:
-(void)scrollWheel:(NSEvent *)theEvent
{
//Pass scrolling to the superview
[_scrollHandler scrollWheel:theEvent];
}
And all is well!
I've created an NSScrollView which itself contains a NSClippedView as content view (this is all default, created by IB). Inside the contents view there is the (default) document view.
This NSScrollView has horizontal scroller disabled and vertical enabled and, most importantly auto hide scrollers enabled.
When I add new views (via code, runtime) to the document view the scroller does not unhide automatically, until the moment I vertically resize the window (and which in turn resizes the scrollview as well). 1px is enough. Just the new painting of the window seems enough.
What I am looking for is triggering this by code: so when I add views to the scrollviews' content view I would like the scrollbar to appear.
int numberOfChildViews = 10; //hard coded for example here
int childViewHeight = 80; //same as above
NSRect rect = NSMakeRect(0, 0, [[self.scrollView contentView] bounds].size.width, [numberOfChildViews*childViewHeight);
[[self.scrollView documentView] setFrame:rect];
[[self.scrollView documentView] setBounds:rect]; //just added to make sure
Then I added the custom views to the document view, like:
for (int i=0; i<numberOfChildViews; i++) {
NZBProgressViewController *item = [nzbProgressArray objectAtIndex:i];
int y=i*[[item view] bounds].size.height;
rect= NSMakeRect(0, y, [[scrollView contentView] frame].size.width, [[item view] bounds].size.height);
[[item view] setFrame:rect];
currentPosition++;
}
I am using a FlippedView so the origin will be displayed in left-top, like so:
#interface NSFlippedClipView : NSClipView {
}
#implementation NSFlippedClipView
- (BOOL)isFlipped {
return YES;
}
- (BOOL)isOpaque {
return YES;
}
#end
And added the following code to the awakeFromNib
NSFlippedClipView *documentView = [[NSFlippedClipView alloc] init];
[documentView setAutoresizingMask:NSViewWidthSizable];
[documentView setBackgroundColor:[self.scrollView backgroundColor]];
[self.scrollView setDocumentView:documentView];
[documentView release];
The scrollbars should become visible as soon as the document view is resized to be larger than the current viewport of the scroll view. Are you resizing the document view when you add your subviews to it?
Ahh, it's my own bad. For future reference: if you want to move the origin (0,0) to left-top use a NSView instead of NSClippedView extended class with IsFlipped method overriden to YES.
Thanks irsk for answering.