UIGraphicsBeginImageContextWithOptions(CGSizeMake(CGRectGetWidth(self.view.frame),
CGRectGetHeight(self.view.frame)), NO,
[UIScreen mainScreen].scale);
// UIGraphicsBeginImageContextWithOptions(CGSizeMake(300, 300), NO, [UIScreen mainScreen].scale);
//
[self.view
drawViewHierarchyInRect:CGRectMake(0,
0,
self.view.frame.size.width, self.view.frame.size.height)
afterScreenUpdates:YES];
_waterImage=
UIGraphicsGetImageFromCurrentImageContext();
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