+ (UIImage *)imageWithimage:(UIImage *)image content:(NSString *)content frame:(CGRect)frame;

+ (UIImage *)imageWithimage:(UIImage *)image content:(NSString *)content frame:(CGRect)frame {
 // 開啟圖形'上下文'
 UIGraphicsBeginImageContextWithOptions(image.size, NO, 0);
 // 繪制原生圖片
 [image drawAtPoint:CGPointZero];
 // 在原生圖上繪制文字
 NSString *str = content;
 // 創(chuàng)建文字屬性字典
 NSDictionary *dictionary = @{NSForegroundColorAttributeName: [UIColor blackColor], NSFontAttributeName: [UIFont systemFontOfSize:20]};
 // 繪制文字屬性
 [str drawInRect:frame withAttributes:dictionary];
 // 從當(dāng)前上下文獲取修改后的圖片
 UIImage *imageNew = UIGraphicsGetImageFromCurrentImageContext();
 // 結(jié)束圖形上下文
 UIGraphicsEndImageContext();
 return imageNew;
}

 double device = [[UIDevice currentDevice].systemVersion doubleValue];
 if (device >= 7.0f) {
  // do something
 }

 // 調(diào)用方法傳入一個(gè)image對象,想要添加的文字和文字所在位置
 UIImage *image = [UIImage imageWithimage:[UIImage imageNamed:@"3"] content:@"伊利丹" frame:      CGRectMake(20, 500, 100, 100)];
 UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, kScreenWidth, kScreenHeight)];
 imageView.image = image;
 [self.view addSubview:imageView];