iPhone下载图片并显示正确比例

Question

I'm downloading a bunch of images from a server and displaying them on the screen. I have about 320x450 to work with. Each image size has a different size, how do i correctly resize images so that they fit on the iphone screen and retain the correct ratio and the same time?

Answer 1

使用您可以适合的任何大小的UIImageView ，并将其设置为与contentMode缩放：

myUIImageView.contentMode = UIViewContentModeScaleAspectFit;

Answer 2

Try this:

UIImage *img = [UIImage imageNamed:@"image.png"];
imageview.frame=CGRectMake(x,y,img.size.width,img.size.height);
[self.view addSubView imageview];

Answer 3

尝试一下，以适应您的图像文件类型：

UIImage *img = [[UIImage imageNamed:@"image.png"] _imageScaledToSize:CGSizeMake(32.0f, 32.0f) interpolationQuality:1];