截屏代码

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();