得到一个UIButton与标记属性IPhone [英] getting at a UIButton with the tag property IPhone

问题描述

我在使用标记属性访问UIButton时遇到了一些麻烦

I'm having a little trouble using the tag property to access a UIButton

UIButton   *randomButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect ]];    
    randomButton.frame = CGRectMake(205, 145, 90, 22); // size and position of button
    [randomButton setTitle:@"Random" forState:UIControlStateNormal];
    randomButton.backgroundColor = [UIColor clearColor];
    randomButton.adjustsImageWhenHighlighted = YES; 
    [randomButton addTarget:self action:@selector(getrandom:) 
           forControlEvents:UIControlEventTouchUpInside];
    randomButton.reversesTitleShadowWhenHighlighted=YES;
    randomButton.toggleButton

    [self.view addSubview:randomButton];

    randomButton.tag=333;

然后稍后在代码中，我尝试按以下方式获取按钮，

Then later on in code I try to get at the button in the following manner which gives me an error saying

不兼容的Objective-C类型
初始化'struct UIView *'，
expected'struct UIButton *'

Incompatible Objective-C types initializing 'struct UIView *', expected 'struct UIButton *'

UIButton *random = [self.view viewWithTag:333];
    random.highlighted=NO;

推荐答案

尝试：

UIButton *random = (UIButton *)[self.view viewWithTag:333];

此外，您为什么在释放按钮后分配标签？

Also, why are you assigning the tag after you have released the button?

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