为什么分配图像后我的UIButton更改大小和位置？ 如何保持相同？

Question

my UIButton size and position changes after I assign an image to it. I am not sure why. Does anyone know?

I tried repositioning the button to its original position but it doesnt work.

CGRect buttonFrame = _subscribeButton.frame;
CGAffineTransform transform = _subscribeButton.transform;

[_subscribeButton setTitle:@"Subscribe" forState:UIControlStateNormal];

[_subscribeButton setImage:[UIImage imageNamed:@"bigButton.png"] forState:UIControlStateNormal];

[_subscribeButton setFrame:buttonFrame];
[_subscribeButton setTransform:transform];

Answer 1

I should be setting backgroundImage not image. this was the problem the whole time. aspect fill only effects the background image as this is scaled by the frame.

answer: [button setBackgroundImage:[UIImage imageNamed:@"blah.png"]];

Answer 2

change this

CGAffineTransform transform = _subscribeButton.transform;

to

CGAffineTransform transform = CGAffineTransformIdentity;

Update:

CGRect buttonFrame = _subscribeButton.frame;

CGAffineTransform transform = CGAffineTransformIdentity;

[_subscribeButton setTitle:@"Subscribe" forState:UIControlStateNormal];

[_subscribeButton setImage:[UIImage imageNamed:@"bigButton.png"] forState:UIControlStateNormal];

[_subscribeButton setContentMode:UIViewContentModeScaleToFill];

_subscribeButton.autoresizingMask = UIViewAutoresizingNone;

_subscribeButton.autoresizesSubviews = NO;



[_subscribeButton setFrame:buttonFrame];

[_subscribeButton setTransform:transform];

Answer 3

try this

 CGRect buttonFrame = _subscribeButton.frame;
    CGAffineTransform transform = CGAffineTransformIdentity;

    [_subscribeButton setTitle:@"Subscribe" forState:UIControlStateNormal];

    [_subscribeButton setImage:[UIImage imageNamed:@"bigButton.png"] forState:UIControlStateNormal];

    [_subscribeButton setFrame:buttonFrame];
    [_subscribeButton setTransform:transform];