UIImage stretchableImage

[Kilopound]

Ok, once I have my UIImage that has been initialized as stretchable and have added it to my UIImageView that I am using, how do I go about stretching it?

[RickMaddy]

Set the image view's frame to the size you want.

[Kilopound]

I may be doing something wrong here. When I tried setting the UIImageView's frame, it resizes the UIImageView but the UIImage stays the same size.

[RickMaddy]

Then you must be creating the stretchable image incorrectly. Post your code.

[Kilopound]

IBOutlet UIIageView *balloonView;
UIImage* balloon = [[UIImage imageNamed:@"balloon.png"] stretchableImageWithLeftCapWidth:25 topCapHeight:25];

balloonView.image = balloon;
balloonView.frame = CGRectMake(0,0,320,320);

[RickMaddy]

What is the size of the balloon.png? If it's not at least 51 x 51 then you need to change the numbers for the stretchable image. The cap width and the cap height must be less than half the width and height of the image respectively.

Just to be sure - do you really want a stretchable image or do you just want to scale this image?

[Kilopound]

My image I am working with is 77x77.

I assume I want a stretchable image seeing that my goal is to have a dynamic balloon that can contain text and either a button or a tableview.

[RickMaddy]

For a stretchable image to work the image must be cap width * 2 + 1 pixels wide and cap height * 2 + 1 pixels tall.

Read the docs on the 'stretchableImage' method. It talks about how the image is used.

[abc123miguel]

Old post but I thought I'd add what I found:

This worked for me:
UIImage *labelImage=[[UIImage imageNamed:@"myRoundedRect.png"] stretchableImageWithLeftCapWidth:140 topCapHeight:30];
//My image is 280 wide and 63 high, using just less than half size seems to look best

//In previous posted code, UIImageView was not initialized, this may have been the problem
UIImageView *labelImageView = [[UIImageView alloc] init];

labelImageView.image = labelImage; //see alternative
labelImageView.frame = CGRectMake(0,0,290,360); //I wanted this big


As alternative could have done:

UIImage *labelImage=[[UIImage imageNamed:@"myRoundedRect.png"] stretchableImageWithLeftCapWidth:140 topCapHeight:30];
UIImageView *labelImageView = [[UIImageView alloc] initWithImage:labelImage]; //set image here
labelImageView.frame = CGRectMake(0,0,290,360);

[cmezak]

@OP

Is your imageview's contentmode set to uiviewcontentmodescaletofill, or something else that will actually link the image's size to the size of the imageview's frame?

- Charlie