我的用户界面生成器来布置我的观点和图像视图。 我把ImageView的视图上，并设置为一个出口。 问题是，不管是什么尺寸图像（768 * 1024,1024 * 700）我在程序中设置：
self.imageView.image = [UIImage imageNamed:self.filename];
要在屏幕上的大小始终是我在Interface Builder中的ImageView的大小。 我怎么能动态地根据图像的大小设置ImageView的大小？ 谢谢！
Answer 1:
就像是：
UIImageView *imageView = [[UIImageView alloc] init];
UIImage *image = [UIImage imageNamed:@"image.png"];
CGSize imageSize = [image size];
imageView.frame = CGRectMake(0, 0, imageSize.width, imageSize.height);
Answer 2:
UIImage *image = [UIImage imageNamed:self.filename];
CGFloat width = image.size.width;
CGFloat height = image.size.height;
self.imageView.frame = CGRectMake(x, y , width, height);
Answer 3:
你可以继承你的形象和做eachTime新的图像设置以下重写：
@interface MyImageSubClass : UIImageView;
@end
@implementation MyImageSubClass
- (void)setImage:(UIImage *)image {
// Let the original UIImageView parent class do its job
[super image];
// Now set the frame according to the image size
// and keeping the original position of your image frame
if (image) {
CGRect r = self.frame;
CGSize imageSize = [image size];
self.frame = (r.origin.x, r.origin.y, imageSize.width, imageSize.height);
}
}
@end
Answer 4:
UIImage *buttonImage2=[UIImage imageNamed:@"blank_button_blue.png"];
oButton=[[UIButton alloc] init];
// [oButton setImage:buttonImage2 forState:UIControlStateNormal];
[oButton setFrame:CGRectMake(0, 0, buttonImage2.size.width, buttonImage2.size.height)];
Answer 5:
UIImage* sourceImage = [UIImage imageNamed:self.filename];;
CGRect rect;
rect.size.width = CGImageGetWidth(sourceImage.CGImage);
rect.size.height = CGImageGetHeight(sourceImage.CGImage);
[ yourimageview setframe:rect];
文章来源: How can I dynamically set the size of the imageView according to the size of the image
