【深入浅出IOS开发】彩票-按钮中图片的拉伸

①UIImaegView的图片拉伸可以通过storyboard或者xib设置

②UIButton不能通过storyboard或者xib设置,必须通过代码

#import <UIKit/UIKit.h>@interface UIImage (Extension)+ (UIImage *)resizableImage:(NSString *)name;@end

#import "UIImage+Extension.h"@implementation UIImage (Extension)/** *  返回一张可以随意拉伸不变形的图片 *  @param name 图片名字 */+ (UIImage *)resizableImage:(NSString *)name{    UIImage *normal = [UIImage imageNamed:name];    CGFloat w = normal.size.width * 0.5;    CGFloat h = normal.size.height * 0.5;    return [normal resizableImageWithCapInsets:UIEdgeInsetsMake(h, w, h, w)];}