让图片不变形

绘制图片到指定的区域切不变形

image是个UIImage类型

[image drawInRect:CGRectMake(10, 50, 300, 450)];

 

或者：

UIImageView *webImgV = [[UIImageView alloc] initWithFrame:CGRectMake(5, 5, 80, 30)];

[webImgV setContentScaleFactor:[[UIScreen mainScreen] scale]];
webImgV.contentMode =  UIViewContentModeScaleAspectFill;
webImgV.autoresizingMask = UIViewAutoresizingFlexibleHeight;
webImgV.clipsToBounds  = YES;