I am having trouble adding a subview above the CALayer of its parent view.
I tried to attach an image to show what i mean but i dont have enough reputation so here is a link to the image:
http://imageshack.us/photo/my-images/843/img0219u.png/
Part of the subview is obscured by the parent views border.
How can i make the subview appear over the top of the parent views layer?
Any help is appreciated.
Here is my code if it helps:
Code for adding layer:
UIView *student = [[UIView alloc] initWithFrame:CGRectMake(50, 50, 100, 100)];
student.backgroundColor = [UIColor grayColor];
CALayer *studentLayer = [[CALayer alloc] init];
studentLayer.borderColor = [UIColor grayColor].CGColor;
studentLayer.borderWidth = 5;
student.layer.borderColor = studentLayer.borderColor;
student.layer.borderWidth = studentLayer.borderWidth;
Code for adding subview:
UILabel *ilp = [[UILabel alloc] initWithFrame:(CGRectMake(-20, -10, 40, 20))];
ilp.text = #"ILP";
ilp.backgroundColor = [UIColor yellowColor];
ilp.textColor = [UIColor blackColor];
ilp.textAlignment = NSTextAlignmentCenter;
[student addSubview:ilp];
Thats not possible so far, The best solution i can think of is that add both the subview and its parent view inside another view than its just a matter of reordering two subviews, so that your subview is above the other and its border.
Hope that help!
Related
I have a UIView in which I define it's border in the following manner:
self.layer.borderColor = [UIColor blackColor].CGColor;
self.layer.borderWidth = 3;
I attach a subview to this UIView, and when I move the subview over the border, it goes underneath it. Is this the intended behavior? Is there anyway to make the subview go on top of it?
According to the Apple specification: It is composited above the receiver’s contents and sublayers.
So, the border will always be above of all your subviews, even if you bring your subview to the front and so on.
So I make a background view to fake the border.
E.g.:
UIView *backgroundView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
backgroundView.backgroundColor = [UIColor blackColor];
backgroundView.clipsToBounds = NO;
UIView *bView = [[UIView alloc] initWithFrame:CGRectInset(backgroundView.bounds, 3, 3)];
bView.backgroundColor = [UIColor redColor];
UIView *cView = [[UIView alloc] initWithFrame:CGRectMake(-50, -50, 100, 100)];
cView.backgroundColor = [UIColor yellowColor];
[bView addSubview:cView];
[backgroundView addSubview:bView];
[self.window addSubview:backgroundView];
and the effect:
Depending on your view structure, it might be easier to add the subview to the parent of your main view. It can then overlap the main view and will overlay the border as you requested.
Did you try setting the superview's 'clipsToBounds' property to YES? This is set to NO by default for performance reasons, but setting it to yes might give you the effect you are looking for.
Insert layer at specific position that suits you:
self.layer.insertSublayer(sublayer, at: 0)
I am facing a really strange issue:
I am instantiating multiple UIImageView inside a for loop with the method CGRectMake, the y origin I am giving seems to be totally wrong on the screen:
Here is my code:
- (void)makeTheView
{
self.view.backgroundColor = [UIColor whiteColor];
UIScrollView *header = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 64, self.view.frame.size.width, 100)];
header.backgroundColor = [UIColor colorWithRed:254/255.0f green:255/255.0f blue:213/255.0f alpha:1.0f];
[self.view addSubview:header];
for (int i = 0; i < 10; i++) {
UIImageView *avatar = [[UIImageView alloc] initWithFrame:CGRectMake(5 + i * 75, 5, 70, 70)];
avatar.image = [UIImage imageNamed:#"bo_pic_baby5.jpg"];
[avatar.layer setCornerRadius:8.0];
avatar.layer.masksToBounds = YES;
NSLog(#"%f", avatar.frame.origin.y);
UILabel *title = [[UILabel alloc] initWithFrame:CGRectMake(0, 50, avatar.frame.size.width, 20)];
title.backgroundColor = [UIColor colorWithRed:148/255.0f green:148/255.0f blue:148/255.0f alpha:0.5f];
title.font = [UIFont fontWithName:#"Arial" size:15];
title.text = #"崔健";
title.textAlignment = NSTextAlignmentCenter;
title.textColor = [UIColor whiteColor];
[avatar addSubview:title];
[header addSubview:avatar];
}
}
According to this code avatar is within header at 5px from the top of header.
But the following is what I obtain visually:
note: when the white area begin, the header view stopped
This is not a real issue since I can reevaluate my frames like this :
CGRectMake(5 + i * 75, - 20, 70, 70)
but it looks really weird, and I am quite sure I am missing something totally trivial here...
I think this will be fixed by:
self.automaticallyAdjustsScrollViewInsets = NO;
Since iOS 7, view controllers automatically adjust scroll view insets so that the scroll view content is not hidden behind the navigation bar because it expects scroll views to start at the top of the screen.
However, the usual solution is to just set the scrollview frame.origin.y to 0.
Your Code is Absolutely Correct , As you are Adding the scrollview on (0,64) Position , So 64 will be count from Bottom of the Navigation Bar, If you want it on top (Just Below the Navigation bar), Change this declaration to as below :
UIScrollView *header = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 100)];
I am trying to add view's content to LAyer's content, IS it possible?
v1=[[UIView alloc]initWithFrame:CGRectMake(10, 10, 30, 30)];
v1.backgroundColor=[UIColor redColor];
UILabel *lbl = [[UILabel alloc]initWithFrame:CGRectMake(05, 05, 20, 20)];
lbl.text=#"ABC";
[v1 addSubview:lbl];
CALayer *iconImageLayer = [[CALayer alloc] init];
iconImageLayer.contents=?????? //Try to add view
Help me solve this
Thank you,
Use the layer property of UIView.
CALayer *iconImageLayer = v1.layer
or just simply use v1.layer wherever you would have used iconImageLayer.
So, when I do this with a regular old view:
UIView *topBlock = [[UIView alloc] initWithFrame:CGRectMake(0,-frameSize.height, frameSize.width, frameSize.height/2)];
[viewController.view addSubview:topBlock];
topBlock.autoresizesSubviews = NO;
topBlock.clipsToBounds = YES;
UIImage *topImage = [UIImage imageNamed:#"BloktLayout"];
UIImageView *topImageView = [[UIImageView alloc] initWithImage:topImage];
topImageView.frame = viewController.view.frame;
[topBlock addSubview:topImageView];
I get the nice old image where I want it, in the top view. But the middle view is a UILabel, and when I try the same thing:
UILabel *midBar = [[UILabel alloc] initWithFrame:CGRectMake(midBarOrigin.x, midBarOrigin.y, midBarWidth, midBarHeight)];
midBar.text = #"Blokt";
midBar.textColor = [UIColor blackColor];
midBar.textAlignment = NSTextAlignmentRight;
midBar.font = [UIFont fontWithName:#"HelveticaNeue-UltraLight" size:80.0f];
[viewController.view addSubview:midBar];
midBar.autoresizesSubviews = NO;
midBar.clipsToBounds = YES;
UIImage *midImage = [UIImage imageNamed:#"BloktLayout"];
UIImageView *midImageView = [[UIImageView alloc] initWithImage:midImage];
midImageView.frame = viewController.view.frame;
[midBar addSubview:midImageView];
I don't see any image at all in the UILabel. Any help?
Seems like the issue is related to your frames.
Tough to say without additional info. Can you post viewController.view.frame, frameSize, and midBarOrigin / midBarWidth / midBarHeight?
In the second codeblock, midBar.clipsToBounds == YES, but it looks like the midImageView.frame is likely very different / outside of midBar.frame in which case it wouldn't be visible.
Edit Some screenshots would help but aren't necessary
Edit 2 Note that subviews' origin points are always relative to the coordinate system of their superview, never relative to the coordinate system of any other view in the view heierarchy. This is likely the heart of the issue here. If you do want to convert CGPoints or CGRects from one coordinate system to another there are methods on UIView such as convertRect: and convertPoint: etc.
Interface Builder doesn't even let you add a control inside of a UILabel.
Instead, if you wish to group multiple controls, you can add them both as subviews of a UIView.
In other words, your image view and label can share the same superview, but the image view cannot be a subview of the label.
If they share the same superview, you can position the image view behind the label, and it should appear "through" the label as long as the label's background is clear.
Simple Way to do.....
You can add UIImageView, UILabel as subview of cell.textLabel
UIImageView *statusImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 4, 8, 8)];<br/>statusImage.backgroundColor = [UIColor redColor];<br/>
statusImage.layer.cornerRadius = 4;<br/>
statusImage.clipsToBounds = YES;<br/>
[cell.textLabel addSubview:statusImage];<br/>
UILabel *Lbl = [[UILabel alloc] initWithFrame:CGRectMake(15, 0, cell.textLabel.frame.size.width - 15, cell.textLabel.frame.size.height)];<br/>
Lbl.text = #"xyz";<br/>
[cell.textLabel addSubview:Lbl];<br/>
I just had this problem as well.
I found that ImageView was behind the label.
When I replaced label with UIView, it works properly.
I'm developing a iOs app for iPad and I'm implementing a UIImageView inside a UIView. The problem is that if the position of the image view has a position out of the UIView that it is inside, you can see it. The code:
UIView *vistafunda = [[UIView alloc] initWithFrame:CGRectMake(512/2, 48, 525, 651)];
[self.view addSubview:vistafunda];
vistafunda.backgroundColor = [UIColor darkGrayColor];
UIImageView *img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"hola.png"]];
img.center = CGPointMake(12, 200);
[vistafunda addSubview:img];
I would like that the image view was always under the view, so if the image is outside the view you could not see it.
Thanks!
Just make the containing view clip it's children
vistafunda.clipsToBounds = YES;