iOS 同时设置view的 center 跟 size 的注意细节

    _showImageView.center = self.center;

    _showImageView.size = _showImage.size;

    

    NSLog(@"第一种: _showImageView.frame ===  %@", NSStringFromCGRect(_showImageView.frame));

    

    _showImageView.center = self.center;

    

    _showImageView.bounds = (CGRect){CGPointZero, _showImage.size};

    NSLog(@"第二种: _showImageView.frame ===  %@", NSStringFromCGRect(_showImageView.frame));

2014-09-23 10:41:59.311 NeiHanShe[6205:60b] 第一种: _showImageView.frame ===  {{160, 284}, {265, 146.13971}}

2014-09-23 10:41:59.311 NeiHanShe[6205:60b] 第二种: _showImageView.frame ===  {{27.5, 210.93015}, {265, 146.13971}}

所有正确设置,应该选择第二种,否则不会居中, 第一种的self.center 会当做_showImageView.frame 的 x y