In actual development of iOS, if we put a picture with a special shape, especially a picture with rounded corners, in UIButton, when the UIButton changes the size, the picture may be stretched and deformed, we can use it through-(UIImage *)resizableImageWithCapInsets:resizingMode:Method (called this method through the UIImage object and passing the name of the image to be stretched as a parameter) returns a stretchable and undeformable image. Here we write this method into the UIImage class classification to encapsulate it. In the future, we can use it directly in iOS development:
UIImage+
#import <UIKit/> @interface UIImage (Extension) /** * The name of the image is passed, and a picture that can be stretched and not deformed * * @param imageName Image Name * * @return stretchable pictures */ + (UIImage *)resizableImageWithName:(NSString *)imageName; @end
UIImage+
#import "UIImage+"
@implementation UIImage (Extension)
+ (UIImage *)resizableImageWithName:(NSString *)imageName
{
// Load the original picture UIImage *norImage = [UIImage imageNamed:imageName];
// Get half of the width and height of the original picture CGFloat w = * 0.5;
CGFloat h = * 0.5;
// Generate a picture that can stretch the specified position UIImage *newImage = [norImage resizableImageWithCapInsets:UIEdgeInsetsMake(h, w, h, w) resizingMode:UIImageResizingModeStretch];
return newImage;
}
@end
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