使用动画修改 UIButton 宽度

Question

这是我的代码，

-(IBAction)casser{
     oeuf1.contentMode       =   UIViewContentModeScaleAspectFit;
    [UIView animateWithDuration:1.0 animations:^{ 
         CGRect newRect      =   oeuf1.frame;
         newRect.size.width *=   5;
         oeuf1.frame         =   newRect;
         [oeuf1 release];
    }];
}

“oeuf1”是一个 UIButton 当我触摸按钮时，我想将其宽度乘以五，但是当我这样做时，按钮会向右移动，并且其宽度不会改变。我该如何解决这个问题？

Answer 1

经过测试的代码 100% 有效

将每个方法与指定的方法连接起来

-(IBAction)expand{//touch down


    NSLog(@"expand");

    [UIView transitionWithView:but duration:0.0 options:UIViewAnimationOptionTransitionNone animations:^(void) {


        CGRect newRect = but.frame;

        CGPoint ce= but.center;
        newRect.size.width *= 5;

        but.frame = newRect;    

        but.center=ce;



    } completion:^(BOOL finished) {



    }];


}

 -(IBAction)shrink{//touch up inside
    NSLog(@"shrink");


    [UIView transitionWithView:but duration:0.0 options:UIViewAnimationOptionTransitionNone animations:^(void) {


        CGRect newRect = but.frame;

        CGPoint ce= but.center;
        newRect.size.width /= 5;

        but.frame = newRect;    

        but.center=ce;



    } completion:^(BOOL finished) {



    }];


}

Answer 2

有效答案：

删除 [oeuf1 release];

Answer 3

你为什么不直接使用

[oeuf1 setFrame:CGRectMake(oeuf1.frame.origin.x, oeuf1.frame.origin.y, oeuf1.frame.size.width*2, oeuf1.frame.size.height)];