1、分类：UIImage (GJ)
+ (instancetype)captureWithView:(UIView *)view{
// 1.开启上下文
UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, 0.0);
// 2.将控制器view的layer渲染到上下文
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
// 3.取出图片
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
// 4.结束上下文
UIGraphicsEndImageContext();
return newImage;
}
2、//保存操作
- (IBAction)save {
// 1.截图
UIImage *image = [UIImage captureWithView:self.paintView];
// 2.保存到图片
UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
}
3、保存图片操作之后就会调用
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo
{
if (error) { // 保存失败
[MBProgressHUD showError:@"保存失败"];
} else { // 保存成功
[MBProgressHUD showSuccess:@"保存成功"];
}
}