iOS 截屏方法

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//获取屏幕截屏
- (UIImage*)getScreenShotsOfView:(UIView *)view{
    CGSize size = view.frame.size;
    UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);
    CGContextRef context = UIGraphicsGetCurrentContext();
    [view.layer renderInContext:context];
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return img;
}