旋转UIButton并保持其大小

时间:2013-04-18 14:24:47

标签: ios objective-c cocoa-touch uiviewanimation cgaffinetransform

我正在尝试旋转按钮,形状为正方形(65 x 65)。旋转后,按钮会改变尺寸。有没有办法,轮换并保持大小?

代码:

[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];

3 个答案:

答案 0 :(得分:3)

尝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"];

在项目中添加以下框架。

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

答案 1 :(得分:0)

它们不会改变它们的大小。它们改变了框架的大小。

添加:

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

但是:通过这样做,你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。

答案 2 :(得分:0)

确保将内容视图设置为居中。

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