I have this UIScrollView inside another UIView, not occuping the entire area (all this is initialized via nib file). I added some content to the scroll view, but whenever I scroll it, the UIScrollView content area moves outside the ScrollView frame, over the UIView area not designated for displaying it.
Shouldn't it remain inside its frame even when I scroll it?
It may be that the clipsToBounds property of your UIScrollView is set to NO. Check the setting in IB, or you can set it in code like so:
scrollView.clipsToBounds = YES;
Failing that, double check that your UIScrollView has exactly the bounds you think it does. Is there any autoresizing flag stuff going on that might be changing the scroll view's bounds?
try to set the clipsToBounds to YES, it may be that:
yourViewController.clipsToBounds = YES;
if not... fbreto is right, post your code...
Make sure you have setContentSize. And also set the frame size of the uiviews inside the uiscrollview correctly when you add them.
Here is a sample code of it http://developer.apple.com/library/ios/#samplecode/Scrolling/Introduction/Intro.html
Related
I currently am making an iOS project in which I have a UIScrollView as a direct subview of a UIWindow (using [window addSubview:scrollView];). The window's frame and its content are being set properly, and the contentSize is set to be bigger than the window's frame. When I try to scroll the UIScrollView, it doesn't scroll at all. Both scrollEnabled and pagingEnabled are set to YES, but the scrollview doesn't scroll, which leads me to believe that the touch/scroll events are not even being received by the scroll view. The window has a UITapGestureRecognizer added to it if it makes any difference. Do I need to somehow forward the swipe events to the UIScrollView, or is there a different reason that it's not scrolling?
EDIT: Here's some code.
float count=ceil([self.msgArray count]/2); //msgArray has length of 3+, NSLog()'d and confirmed.
float contentHeight=97.5 * count;
[dataScrollView setContentSize:CGSizeMake(320,contentHeight)];
dataScrollView.userInteractionEnabled=YES;
dataScrollView.pagingEnabled=YES;
dataScrollView.scrollEnabled=YES;
dataScrollView.clipsToBounds=YES; //Have also tried with this set to NO, or not set at all.
//Add subviews to dataScrollView.
EDIT: Here's some more info.
contentHeight is 195.00 when logged. I've removed the delegate method and I am back to using direct subviews of the scroll view. The window's height is 97.50.
EDIT: I've also removed the UITapGestureRecognizer from the UIWindow, but the scrollview still doesn't scroll.
Ah, the UITapGestureRecognizer! This might be a bug that took me hours to figure out in my own project. Is its cancelsTouchesInView property set to NO like it should be? (YES is the default... It can really throw you off if you're not expecting it.)
Just log the scrollview bounds width/height. The content height you are setting should be greater than the scrollview height. If its more then the scroll view automatically enables its scrolling.
I'm adding a cameraOverlay to my UIImagePickerController, it shows and all but it doesn't register touches. I init a button in the viewDidLoad and a one via IB.
Is there some rule that prohibits me from adding a UIButton to a cameraOverlayView and register touches?
Thanks
I had a similar problem, and it turned out that my overlay UIView's frame was not large enough. The clipsToBounds property for a UIView is by default set to NO, which means its subviews are still visible even if they are outside the parent's frame.
So essentially, make sure your overlay's frame is large enough, or that your subviews of the overlay are positioned within its bounds.
I'm experiencing something considered a bug in my situation. Probably this is not a bug but a feature ;).
Here's my case:
I load a UIScrollView with my content. A part of my content is loaded asynchrone after the view is already loaded. This works great and without issue.
Some of these controls however are UITextView controls. Once I set the content (text property) of these controls after the viewDidLoad my UIScrollView scrolls down to the last UITextView that was set. I want to prevent this and want the UIScrollView to maintain it's top scrolled position.
In summary:
If I set the Text property in the viewDidLoad method no scroll occurs. If I set the Text property on the UITextView after the viewDidLoad method (because I load the data asynchronous) the UIScrollView will scroll to the last UITextView that was set. I want to prevent this scroll.
How do I achieve this ? I have a feeling this is just a property which is set wrong but I can't seem to find it.
Thanks in advance.
EDIT:
I've tried setting the "scrollEnabled" property to NO before setting the values and to YES after but this didn't have any effect. The ScrollView will still scroll when the text property of the UITextView is set.
I Fixed the issue with a work-around:
I set the scroll view content size to something small, like 320 x 300 or whatever the height of the scrollview frame is, then did my work, then put the content size back to normal.
This prevents the scrolling while the data is loaded and enables it as soon as the loading is finished.
This would not change the scrolling problem but maybe make it "hidden" for the user:
yourTextView.text = #"Eat more bananas!";
yourScrollView.contentOffset = CGPointMake(0.0, 0.0);
Some snippets of your code would help to face the problem more specific.
EDIT:
Or try to add the UITextViews to a UIView, then add the UIView to the UIScrollView. Make sure that the UIScrollView's contentSize is the same as the Size of the UIView.
This worked for me too :p but i had to set the height to something less then 300 (in my case i just used 10).
Basically the idea is to make the text view not part of the visible area of the UIScrollView wile you are changing the text of th UITextView.
so I have a UIImageView in a UIView but when I run it in the iPhone Simulator, the image goes beyond the boundaries of the UIView. What's wrong...?
Have a look at the clipsToBounds property of UIView. If you set this to YES on your view the UIImageView shouldn't extend outside of that view any more.
You may also benefit from using the Content Mode property in which you can specify how the content is drawn to fit the view. You can set it to fill, fit-to-scale, etc.
I have built a view for an iPhone app in Interface Builder. It is a UIScrollview with a UIView and a UIButton on the UIView. The only code I have is setting the scroll view's contentSize to 320x550 in the viewDidLoad method of the xib's File Owner class. When the button is within the normal view area (320x480) the button responds as normal, but if is placed outside of those boundaries in Interface Builder the button will not respond when I scroll to it and click the button.
What am I missing? I figure it might be something I need to set on the UIView. But I am not sure what that is.
Your UIButton won't response even it's visible because it's not in the boundary of parent view. You can see object outside the boundary of its parent view because it's a default behavior of UIView to draw all subview (clipsToBounds = NO)
To see the truth, try this code.
UIView *yourUIView = ...
yourUIView.clipsToBounds = YES;
yourUIView.backgroundColor = [UIColor cyanColor];
You will no longer see your UIButton.
To fix this, enlarge your UIView.
I had the same problem as the person who posted the question. Thanks to the first answer, I had a hint as to what to do. I increased the height of the view by adjusting the frame. This, apparently must be done in code. Once this was done, however, the toolbar at the bottom was no longer visible. So before I adjust the height of the view, I grab the position of the tool bar. Then after adjusting the height of the view, I reset the position of the tool bar. Now all is good.