I have a scrollview that is subview of view, and has the subviews. The problem is this: the scrollView came with the black background (as I have set transparent) and also does not work. The scrollView is connected with an IBOutlet. I redid the XIB 2 times, what needs fixing? When I add the scrollView as subview of view:
[self.view addSubview:self.scrollView];
I get this error during runtime:
0x132b61: calll 0x132b66; CA::Layer::ensure_transaction_recursively(CA::Transaction*) + 14
EXC_BAD_ACCESS(code=2 address=0xbf7ffffc)
If I do not add it as a subview in the code, the view controller opens and the scrollview is black and does not scroll.
You are probably doing somewhere, something like:
[myScrollView addSubview:myAnotherView];
[myAnotherView addSubview:myScrollView];
which kicks an unwanted recursion. Check your code.
Check if you init with your scrollView with frame:
self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 280, 360)];
Remember also to set contentSize bigger than frame, for example:
self.scrollView.contentSize = CGSizeMake(2*280, 360);
Also add delegate in your interface:
<UIScrollViewDelegate>
And delegate it:
self.scrollView.delegate = self;
In my situation I had a UIView that was receiving the same error. In my case I had forgotten to create an IBOutlet for my view. Once I did this, the error went away.
Related
Note:Both Horizontal and vertical scrollers are visible on the screen and work fine.But I cant make them move Programatically.
I am working on a cocoa desktop application.I am using the NSScrollview in my Mainmenu.xib file and I am creating an outlet in its owner which is Appdelegate.h .
Here is the outlet
#property(nonatomic,retain) IBOutlet NSScrollView* scrollview;
When I try to set a new referencing outlet of my NSScrollview from the interface builder and take the line to file's owner I only see one option "delegate".I dont see the outlet scrollview.
So I connect the scrollview to the delegate in file's owner (As I cant see the scrollview outlet).
Now I am trying to do auto scrolling in my code.Here is the code
for(int a=0;a<10000;a++)
{
NSPoint pointToScrollTo = NSMakePoint ( 100+a,100+a ); // Any point you like.
[[self.scrollview contentView] scrollToPoint: pointToScrollTo];
[self.scrollview reflectScrolledClipView: [self.scrollview contentView]];
}
This code does not work and The scroller does not scroll automatically.
I am trying to make a slow scrolling animation with this code.
NSClipView has a scrollToPoint: method which can be used to scroll programmatically:
- (IBAction)scrollToMid:(id)sender
{
CGFloat midYPoint = [self.scrollView contentView].frame.size.height/2.0;
[[self.scrollView contentView] scrollToPoint:NSMakePoint(0.0, midYPoint)];
[self.scrollView reflectScrolledClipView:[self.scrollView contentView]];
}
If you want animated scrolling, you have to set the boundsOrigin via animator proxy. (Because neither NSScrollView nor NSClipView expose an animatable scroll point property)
- (IBAction)scrollToMidAnimated:(id)sender
{
[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:2.0];
NSClipView* clipView = [self.scrollView contentView];
NSPoint newOrigin = [clipView bounds].origin;
newOrigin.y = [self.scrollView contentView].frame.size.height/2.0;
[[clipView animator] setBoundsOrigin:newOrigin];
[NSAnimationContext endGrouping];
}
Better way to get this, flip the view. I have worked on this to get the scroll view to top.
-(void)scrollToTop:(NSScrollView *)scrollView
{
NSPoint newScrollOrigin;
if ([[scrollView documentView] isFlipped]) {
newScrollOrigin=NSMakePoint(0.0,0.0);
} else {
newScrollOrigin=NSMakePoint(0.0,NSMaxY([[scrollView documentView] frame]) -NSHeight([[scrollView contentView] bounds]));
}
[[scrollView documentView] scrollPoint:newScrollOrigin];
}
That should be called in windowDidLoad to get the position .
-(void)windowDidLoad
{
[super windowDidLoad];
[self scrollToTop:_myScroll];
}
In the identity inspector of your File's Owner, check its class. It must be set to NSApplication. You have to change it to AppDelegate to get the outlet scrollview to which you can connect your scrollview.
But the better option is to have a NSObject in your xib and set its class to AppDelegate. (However xcode create it by default, check if a item "AppDelegate" is present in the box "objects" below "Placeholders" where FileOwner is present). Now drag a Referencing outlet line from your scrollview to that object. It will show the IBOutlet object name of your Appdelegate class.
UPDATE:
You cannot create a slow animation using a for loop. The for loop is so fast that you will see only the final result, not the complete scrolling. You need to use core animation for slow animation or NSTimer to delay scrolling to make it slow.
Plus please try using [scrollview documentView] , everywhere in place of [scrollview contentView] . Although i haven't given it a try.
Ok I worked on it, and this is the final result
If your scroll bar is on top, the following will move it to end:
[scroll.contentView scrollToPoint:NSMakePoint(0, ((NSView*)scroll.contentView).frame.size.height - scroll.contentSize.height)];
[scroll reflectScrolledClipView: [scroll contentView]];
You may modify the above as per your need.
Also even your code is working, but you need to take the relative points in place of any point.
So instead of placing your code in the for loop, test it by dragging a button on your xib, and in its button action write:
NSPoint pointToScrollTo = NSMakePoint ( 100,100 ); // Any point you like.
[[scrollview contentView] scrollToPoint: pointToScrollTo];
[scrollview reflectScrolledClipView: [scrollview contentView]];
Now run the application, set the scroll of scrollview to some random position. Then click the button and check if scroll moved somewhere.
If it works then your code is fine, your only need to set the points accordingly. It worked for me.
I found that if you are using NSViewController, you need to do the 'scrollPoint' in your viewWillAppear method, rather than in viewWillLoad. FYI.
I've put a UIButton inside a custom UIView and the button is not receiving any touch events (it doesn't get into the highlighted state, so my problem is not about being unable to wire up a touch inside up handler). I've tried both putting it into the XIB in Interface Builder, and also tried programatically adding the UIButton into the UIView seperately, both ended with no luck. All my views are inside a UIScrollView, so I first though UIScrollView may be blocking them, so I've also added a button programatically exactly the same way I add my custom view into UIScrollView, and the button worked, elimination the possibility of UIScrollView could be the cause. My View's hiearchy is like this:
The button is over the image view, and the front layer isn't occupying my button completely, so there's no reason for me not be physically interacting with the button. At my custom view's code side, I'm creating my view as such:
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
UIView *sub = [[[NSBundle mainBundle] loadNibNamed:#"ProfileView" owner:self options:nil] objectAtIndex:0];
[self addSubview:sub];
[sub setUserInteractionEnabled:YES];
[self setUserInteractionEnabled:YES];
CALayer *layer = sub.layer;
layer.masksToBounds = YES;
layer.borderWidth = 5.0;
layer.borderColor = [UIColor whiteColor].CGColor;
layer.cornerRadius = 30.0;
/*layer.shadowOffset = CGSizeZero;
layer.shadowRadius = 20.0;
layer.shadowColor = [[UIColor blackColor] CGColor];
layer.shadowOpacity = 0.8;
*/
}
return self;
}
I've tried all combinations of setUserInteractionsEnabled, and had no luck. (Yes, also set them to checked in Interface Builder too). I've also read in another question with a similar problem that I should try overriding 'canBecomeFirstResponder' to return 'YES' and I've also done that too. But the problem persists, I can't click the button. I've not given any special properties, settings to the button, it's just a regular one. My other objects in the view (labels below, image view behind the button etc.) are working properly without problems. What could be possibly wrong here?
Thanks,
Can.
UPDATE: Here is a quick reproduction of the problem: https://dl.dropbox.com/u/79632924/Test.zip
Try to run and click the button.
Looking at the test project, I believe your problem in the way you create TestView, you do not specify the frame for it, so basically the parent view is 0 size, and the subviews you see from XIB extending out of the parent view and thus do not get anything in responder chain.
You should either specify the frame when creating TestView, or adjust the frame after loading XIB file.
I have had this problem as well. The cause for me was that the UIButton superview frame was of height 0, so I believe that even though a touch was happening, it was not being passed down to the button.
After making sure that the button's superview took a larger rectangle as a frame the button actions worked.
The root cause for this problem on my side was a faulty auto layout implementation (I forgot to set the height constraint for the button's superview).
I've found the solution. I was initializing my custom view as:
MyView *view = [[MyView alloc] init];
I've initialized it instead with a frame of my view's size, and it started responding to events:
CGRect rect = CGRectMake(0,0,width,height);
MyView *view = [[MyView alloc] initWithFrame:rect];
Storyboard Solution
Just for anyone wanting a solution to this when using storyboards and constraints.
Add a constraint between the superview (containing the button) and the UIButton with an equal heights constraint.
In my case, I had selected embed UIButton in a UIView with no inset on the storyboard. Adding the additional height constraint between the UIButton and the superview allowed the UIButton to respond to touches.
You can confirm the issue by starting the View Debugger and visually confirm that the superview of the UIButton is not selectable.
(Xcode 11, *- Should also work in earlier versions)
I have created a scroll(width 320, height 420) in 'Interface Builder'.
and in class:
-(void)viewWillAppear:(BOOL)animated {
[scroll setContentSize:CGSizeMake(scroll.frame.size.width, 1000)];
}
but the scroll view is not scrolling?
See the print screens
http://imageshack.us/photo/my-images/832/scrollo.png
http://imageshack.us/photo/my-images/203/capturadetela20121103s2.png
http://img802.imageshack.us/img802/889/capturadetela20121103s2.png
I think maybe you have not successfully added the images or have not successfully set the scrollView's contentSize. And I suggest you to set the contentSize after you add the image view to your scrollView. viewDidLoad is good idea. Most of the time don't do much work in viewWillAppear. The view will not be shown until this method finish.
Check if you init with your scrollView with frame:
self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 280, 360)];
Remember also to set contentSize bigger than frame, for example:
self.scrollView.contentSize = CGSizeMake(2*280, 360);
Also add delegate in your interface:
<UIScrollViewDelegate>
And delegate it:
self.scrollView.delegate = self;
Problem resolved: "Auto layout" was on ... must to be off.
I have only been working in iOS for a few months but I have been banging my head against the wall for hours and hours for something that seems like it should be pretty straightforward. I used the master detail template in Xcode for an iPad app. I want the detail portion to be scrollable to show content below what is visible in the frame, in either orientation. I have tried numerous combinations of adding scrollviews in the DetailViewController in viewWillAppear, viewDidLoad, loadView...and the best I can come up with is what looks like a scrollable view on the top layer as it does show scroll bars and shows me that I did the scrollView.contentSize correctly as I can pan around, but the actual view with the fields and stuff doesn't move and the fields are unable to be edited. Here is my viewDidAppear as it stands at the moment. As you can see in the NSLogs I am trying to understand the view stack. If I uncomment the line before the logs, I lose the scroll bars altogether.
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 768, 1024)];
scrollView.contentSize = CGSizeMake(2048, 2048);
UIView *parentView = [[UIView alloc] init];
parentView = [[self view] superview];
[[parentView superview] addSubview:scrollView];
//[scrollView addSubview:[self view]];
NSLog(#"%#", [parentView superview]);
NSLog(#"%#", parentView);
NSLog(#"%#", [super view]);
NSLog(#"%#", [self view]);
[scrollView setDelegate:self];
}
I would sincerely appreciate any guidance or tips on how to properly implement UIScrollView for this scenario.
You should add the UIScrollView in IB. Be sure to move all of your existing views and controls to be subviews of the scroll view. And you'll have to link the scroll view to an IBOutlet so you can set the content size in your view controller.
Instead of trying to wrap a uiscrollview around your main view's superview (which you have incorrectly tried to take ownership of (it should be NULL anyways)), why not herd your UI elements into a full-sized subview and wrap the scrollview around that? It would be much much easier.
Your hierarchy would look like this:
Self.view -> ScrollView (with contentSize set) -> UIView containing elements that need to be scrolled -> various UI elements
When using UISplitViewController on the iPad there's a black vertical divider line between the root and detail view. Is there any way to remove this line?
Thanks
Excellent answer by #bteapot. I tested this and it works, even gets rid of the line between master/detail nav bars.
You can do this in storyboard by adding the "gutterWidth" key path and the value 0 to the USplitViewController runtime attributes.
Actuly I have some modification to answer of (Dylan)'s answer
in the appDelegate we need to add image in spliteview controller rather then window
self.splitViewController.view.opaque = NO;
imgView = [[UIImageView alloc] initWithImage:
[UIImage imageNamed:#"FullNavBar.png"]];
[imgView setFrame:CGRectMake(0, 0, 1024, 44)];
[[self.splitViewController view] insertSubview:imgView atIndex:0];
[[self.splitViewController view] setBackgroundColor:[UIColor clearColor]];
here self is object of AppDelegate.
now Apply the answer of this thread : iPhoneOS SDK - Remove Corner Rounding from views (iPad problem) answer by (abs)
edit in above post's answer is
-(void) fixRoundedSplitViewCorner {
[self explode:[[UIApplication sharedApplication] keyWindow] level:0];
}
-(void) explode:(id)aView level:(int)level
{
if ([aView isKindOfClass:[UIImageView class]]) {
UIImageView* roundedCornerImage = (UIImageView*)aView;
roundedCornerImage.hidden = YES;
}
if (level < 2) {
for (UIView *subview in [aView subviews]) {
[self explode:subview level:(level + 1)];
}
}
imgView.hidden = FALSE;
}
** make imgView.hidden to FALSE
declare imgView to the AppDelegate.h file**
and dont forget to call this
-(void)didRotateFromInterfaceOrientation:
UIInterfaceOrientation)fromInterfaceOrientation
{
[yourAppDelegate performSelector:#selector(fixRoundedSplitViewCorner)
withObject:NULL afterDelay:0];
}
chintan adatiya answer covers only the corners and the navigation bar, but I found an trick how to cover the line between the Master and the Detail view.
It is not nice but it works like a charm.
First create an image which is 1 px wide and 704 pixels high.
In the didFinishLaunchingWithOptions add the following code:
UIView *coverView = [[UIView alloc] initWithFrame:CGRectMake(320, 44, 1, 704)];
[coverView setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"divider_cover.png"]]];
[splitViewController.view addSubview:coverView];
And done.
When you want a background image which is continues create 3 images:
Master: width: 320, height: 704
Detail: width: 703, height: 704
Divider:width: 1, height: 704
First post here, hi everyone.
I discovered how to do it accidentally... when I tried to find why I had LOST the divider line. Here's how to hide it, if you're still interested:
1) In your Detail (right-side) view, make sure you have a subview that spans the whole view.
2) Offset this subview view to (-1, 0).
3) Make sure that the Detail View has its "Clip Subviews" option unchecked.
Voilà, enjoy.
You can mostly get rid of it by setting another image behind it in the main window's views. This is from the app delegate didFinishLaunchingWithOptions
// Add the split view controller's view to the window and display.
splitViewController.view.opaque = NO;
splitViewController.view.backgroundColor = [UIColor clearColor];
[window addSubview:splitViewController.view];
[window insertSubview:bgImageView belowSubview:splitViewController.view];
[window makeKeyAndVisible];
But it still leaves two visual artifacts at the top and the bottom that appear to be custom drawn by the splitviewcontroller.
Interestingly, In the app that I'm working on I want a black background color for both views in the UISplitViewController. I'd like to change the color of the divider line to white (so that you can see it). Making both background colors black is one way to get rid of (make invisible) the dividing line but that's probably not a solution for most people.
Tested on iOS10 (probably will work on iOS9 too).
splitviewController.view.backgroundColor = UIColor.white
it removes divider. Apparently divider is just a gap between master and detail container.
I looked around for a while, and came to the conclusion that theres no way to do this, other than to create your own custom split view.
Try the MGSplitViewController by Matt Gammell
http://mattgemmell.com/2010/07/31/mgsplitviewcontroller-for-ipad
I may be late here, but I DO have a solution that works. It even works for the iOS 8+ splitViewController.preferredDisplayMode = UISplitViewControllerDisplayModeAllVisible; and seamlessly slides in and out when you press the Full Screen toggle button.
Here is the trick :
first Subclass UISplitViewController.m
In the header add the follwing :
#property (strong, nonatomic) UIView *fakeNavBarBGView;
In the viewDidLoad method add the following code :
CGFloat fakeNavBarWidth = 321; // It is important to have it span the width of the master view + 1 because it will not move when the split view slides it's subviews (master and detail)
CGFloat navbarHeight = self.navigationController.navigationBar.frame.size.height + 20;
self.fakeNavBarBGView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, fakeNavBarWidth, navbarHeight)];
self.fakeNavBarBGView.backgroundColor = [UIColor redColor];
// Add Fake navbar to back of view
[self.view insertSubview:self.fakeNavBarBGView atIndex:0];
// SplitView Controller
UISplitViewController *splitViewController = self;
DetailViewController *detailVC = [navigationController.viewControllers lastObject];
detailVC.fakeNavBarSubView = self.fakeNavBarBGView;
detailVC.SVView = self.view;
In the DetailViewController.h add the following :
#property (strong, nonatomic) UIView *SVView;
#property (strong, nonatomic) UIView *fakeNavBarSubView;
Now here is the final trick : in the DetailViewController.m, add the following in the viewDidLoad method (called every time you click the Master table) :
[self.SVView sendSubviewToBack:self.fakeNavBarSubView];
[self.SVView bringSubviewToFront:self.view];
Run it and watch the magic ;-)
Private API (can cause App Store rejection):
[splitViewController setValue:#0.0 forKey:#"gutterWidth"];
I did this accidentally by setting the backgroundColor property of the first viewController's view - possibly to clearColor, I don't remember now.
UIManager.put("SplitPaneDivider.draggingColor", new Color(255, 255, 255, 0));