ios - Rotate UIButton and preserve its size

Question

I am trying to rotate buttons, that are shaped as a square (65 x 65). After I rotate them, the buttons change their sizes. Is there any way, to make a rotation and keep the size?

Code:

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.5];

self.stealthButton.transform = CGAffineTransformMakeRotation(radians);
self.recButton.transform = CGAffineTransformMakeRotation(radians);
self.toggleButton.transform = CGAffineTransformMakeRotation(radians);
[UIView commitAnimations];

Answer 1

试试这样可能对你有帮助，

CABasicAnimation *fullRotation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    fullRotation.fromValue = [NSNumber numberWithFloat:0];
    fullRotation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)];
    fullRotation.duration = 1;
    fullRotation.repeatCount = 1;
    [button.layer addAnimation:fullRotation forKey:@"360"];

在您的项目中添加以下框架。

#import <QuartzCore/QuartzCore.h>
#import "QuartzCore/CALayer.h"

Answer 2

他们不会改变他们的大小。他们改变框架的大小。

添加：

CGFrame oldFrame = self.stealthButton.frame;
//Do that for all the buttons
//Do your rotation
self.stealthButton.frame = oldFrame;

但是：这样做实际上会缩小按钮的大小。从用户的角度来看，它会显得更小。

Answer 3

确保您将内容视图设置为居中。

self.stealthButton.contentMode = UIViewContentModeCenter;
self.recButton.contentMode = UIViewContentModeCenter;
self.toggleButton.contentMode = UIViewContentModeCenter;