获得UIImageView的高宽值

Question

需要获取图片的尺寸，高*宽。
然后将值传递到下面的代码：

 UIImageView *imgView=[[UIImageView alloc] initWithFrame:CGRectMake(25, 5, imgView.size.width, imgView.size.width)];

但是总是不成功，不知道应该怎么实现？谢谢

Answer 1

UIImageView *imgView=[[UIImageView alloc] initWithFrame:CGRectMake(25, 5, imgView.size.width, imgView.size.width)];

你这样创建，这时的UIImageView还没有width及height.UIImageView 尺寸依据它添加的UIImage

UIImage *img=[UIImage imageNamed:@""];
UIImageView *imgView=[[UIImageView alloc] initWithImage:img];
imgView.frame=CGRectMake(25, 5, imgView.size.width, imgView.size.width);