调整大小时，UIButton的imageView变为隐藏

Question

Consider the following code. Testing on iOS 7.1

- (void)viewDidLoad {
    [super viewDidLoad];
    UIButton *button = [[UIButton alloc] init];
    [self.view addSubview:button];
    [button setTitle:@"Test" forState:UIControlStateNormal];
    [button setImage:[UIImage imageNamed:@"Default"] forState:UIControlStateNormal];
    button.imageView.hidden = YES;
    [button sizeToFit];
    NSLog(button.imageView.hidden ? @"YES" : @"NO");
    //button's imageView is no longer hidden!
}

Why would sizeToFit unhide the imageView?

Answer 1

Please try to hide the image by changing the setImage property to nil like -

[button setImage:nil forState:UIControlStateNormal];

instead of setting hidden=YES and than resizing the button manually.