getting at a UIButton with the tag property IPhone

问题

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;

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

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

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

回答1:

Try:

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

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

来源：https://stackoverflow.com/questions/2802802/getting-at-a-uibutton-with-the-tag-property-iphone