//返回裁剪区域图片
-(UIImage*)clicpViewWithRect:(CGRect)aRect { //arect 想要截图的区域
CGFloat scale = [UIScreen mainScreen].scale;
aRect.origin.x*= scale;
aRect.origin.y*= scale;
aRect.size.width*= scale;
aRect.size.height*= scale;
UIGraphicsBeginImageContextWithOptions(CGSizeMake(self.view.width, self.view.height), YES, scale);
[self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
CGImageRefimageRef = viewImage.CGImage;
CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, aRect);
UIImage*sendImage = [[UIImagealloc]initWithCGImage:imageRefRect];
returnsendImage;
}
