如何将FBProfilePictureView转换为UIImage？

一切正常FBProfilePictureView工作正常，但我需要从FBProfilePictureView得到的图片，并把它变成一个UIImage。

我应该怎么做？

我试着用这个：

UIGraphicsBeginImageContext(self.profilePictureView.frame.size); [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); self.TestPictureOutlet.image = viewImage; 

但是这不适用于我的解决scheme。

Answer 1

FBProfilePictureView是一个UIView，这个UIView包含一个UIImageView，也就是你的图像，你可以从这个UIImageView获取UIImage：

profilePictureView是一个FBProfilePictureView

 UIImage *image = nil; for (NSObject *obj in [profilePictureView subviews]) { if ([obj isMemberOfClass:[UIImageView class]]) { UIImageView *objImg = (UIImageView *)obj; image = objImg.image; break; } } 

编辑：更快速地添加另一种方式，但做同样的事情

 __block UIImage *image = nil; [self.view.subviews enumerateObjectsUsingBlock:^(NSObject *obj, NSUInteger idx, BOOL *stop) { if ([obj isMemberOfClass:[UIImageView class]]) { UIImageView *objImg = (UIImageView *)obj; image = objImg.image; *stop = YES; } }]; 

Answer 2

上面提到的两个解决scheme都可以很好地从FBProfilePictureView中获取UIImage对象。 唯一的事情是，你需要延迟才能从FBProfilePictureView获取图像。 喜欢：

 [FBRequest requestForMe] startWithCompletionHandler: ^(FBRequestConnection *connection, NSDictionary<FBGraphUser> *user, NSError *error) { if (!error) { myNameLbl.text = user.name; profileDP.profileID = user.id; //NOTE THIS LINE WHICH DOES THE MAGIC [self performSelector:@selector(getUserImageFromFBView) withObject:nil afterDelay:1.0]; }]; - (void)getUserImageFromFBView{ UIImage *img = nil; //1 - Solution to get UIImage obj for (NSObject *obj in [profileDP subviews]) { if ([obj isMemberOfClass:[UIImageView class]]) { UIImageView *objImg = (UIImageView *)obj; img = objImg.image; break; } } //2 - Solution to get UIImage obj // UIGraphicsBeginImageContext(profileDP.frame.size); // [profileDP.layer renderInContext:UIGraphicsGetCurrentContext()]; // img = UIGraphicsGetImageFromCurrentImageContext(); // UIGraphicsEndImageContext(); //Here I'm setting image and it works 100% for me. testImgv.image = img; } 

问候！

Aamir Ali – iOS应用程序开发人员

@时间组（TGD）

Answer 3

这里的解决scheme。

脚步：

请确保您将FB用户标识分配给类“FBProfilePictureView”的对象在我的情况下这个类对象是“userPictureImageView”

 -(void)saveFBUserImage { CGSize imageSize = self.userPictureImageView.frame.size; UIGraphicsBeginImageContext(imageSize); CGContextRef imageContext = UIGraphicsGetCurrentContext(); [self.userPictureImageView.layer renderInContext: imageContext]; UIImage* viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); NSData *imageData = UIImageJPEGRepresentation(viewImage,1); UIImage * img = [UIImage imageWithData:imageData]; NSString *filePath = <specify your path here>; CGSize size = img.size; if(size.height > 50) size.height = 50; if(size.width > 50) size.width = 50; CGRect rect = CGRectMake(0.0f, 0.0f, size.width, size.height); CGSize size2 = rect.size; UIGraphicsBeginImageContext(size2); [img drawInRect:rect]; img = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); NSData *newImageData = UIImageJPEGRepresentation(img, 1.0); [newImageData writeToFile:filePath atomically:YES]; } 

而已。 🙂

Answer 4

我发现上面的解决scheme是相当工作，但这里是更新的代码，我发现它更容易。

  @property FBSDKProfilePictureView *pictureView; if ([FBSDKAccessToken currentAccessToken]) { self.pictureView=[[FBSDKProfilePictureView alloc]init]; [self.pictureView setProfileID:@"me"]; [self.pictureView setPreservesSuperviewLayoutMargins:YES]; [self.pictureView setPictureMode:FBSDKProfilePictureModeNormal]; [self.pictureView setNeedsImageUpdate]; [self performSelector:@selector(getUserImageFromFBView) withObject:nil afterDelay:1.0]; } -(void) getUserImageFromFBView { UIImage *image = nil; for (NSObject *obj in [self.pictureView subviews]) { if ([obj isMemberOfClass:[UIImageView class]]) { UIImageView *objImg = (UIImageView *)obj; image = objImg.image; break; } } [self.profilePic setImage:image forState:UIControlStateNormal]; } 

希望这可以帮助。 在这里，我已经放了1秒的延迟，等待configuration文件图片加载。