1. 全屏截圖
+ (UIImage *)snapshotScreen {
UIWindow *window = [UIApplication sharedApplication].keyWindow;
UIGraphicsBeginImageContextWithOptions(window.bounds.size, NO, [UIScreen mainScreen].scale);
[window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
2. view生成圖片
+ (UIImage *)snapshotWithView:(UIView *)view {
UIGraphicsBeginImageContextWithOptions(view.bounds.size, NO, [UIScreen mainScreen].scale);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
2. scrollView生成長圖
+ (UIImage *)snapshotWithScrollView:(UIScrollView *)scrollView {
CGPoint savedContentOffset = scrollView.contentOffset;
CGRect savedFrame = scrollView.frame;
scrollView.contentOffset = CGPointZero;
scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);
UIGraphicsBeginImageContextWithOptions(scrollView.contentSize, NO, [UIScreen mainScreen].scale);
[scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
scrollView.contentOffset = savedContentOffset;
scrollView.frame = savedFrame;
return image;
}
