IOS开发之截图(snapshot picture)

最近要实现一个截图分享的功能，开始是丈二和尚摸不着头脑，后来一查还挺简单的。

写个函数就搞定：

- (UIImage *) captureScreen { UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow]; CGRect rect = [keyWindow bounds]; UIGraphicsBeginImageContext(rect.size); CGContextRef context = UIGraphicsGetCurrentContext(); [keyWindow.layer renderInContext:context]; UIImage *img = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return img; }

如果要保存到相册:

- (void)saveScreenshotToPhotosAlbum:(UIView *)view { UIImageWriteToSavedPhotosAlbum([self captureScreen], nil, nil, nil); }