objective-c - 如何拍摄屏幕截图并将该屏幕截图保存在相册中

Question

我正在处理贺卡的应用，我已经拍摄了屏幕截图并保存在图库中，因此请提供适用于我的代码的任何建议和源代码

Answer 1

Like so:

- (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;
}

Then save the image to camera roll using the following tutorial http://mobiledevelopertips.com/camera/save-an-image-to-camera-roll.html