如何使用Facebook图形API获取Facebook照片的源URL？

问题描述

你能告诉我如何使用图形API来获取照片的源URL吗？因为我有照片ID，似乎我应该可以打电话来获取源URL。

作为我正在尝试做的一个例子，以下代码工作：

   - （IBAction）showPicture：（UIButton *）sender; 
 {
 //检索图片的代码
 
 id path = @http://photos-e.ak.fbcdn.net/photos-ak-snc1/v5041/ 89 /40796308305分之51/ a40796308305_1960517_6704612.jpg; 
 NSURL * url = [NSURL URLWithString：path]; 
 NSData * data = [NSData dataWithContentsOfURL：url]; 
 UIImage * img = [[UIImage alloc] initWithData：data]; 
 [self.label setText：（NSString *）path]; 
 imageView.image = img; 
 [img release]; 
 
} 
  

但是，当我有源网址时，这可以工作。有没有办法使用图形API，以便我可以将 id path = @http：// ...替换为 id路径= [_facebook requestWithGraphPath：@98423808305 / sourceandDelegate：self]; ???

---

更新以包含请求didLoad方法

   - （void）请求：（FBRequest *）请求didLoad：（id）result { 
 
 
 if（[request.params objectForKey：@picture]）{
 //从结果中获取照片ID 
 NSString * photoId =（NSString *） [result objectForKey：@id]; 
 shitStorm = photoId; 
} 
 
 
 if（[result isKindOfClass：[NSArray class]]）{
 result = [result objectAtIndex：0]; 
} 
 if（[result objectForKey：@owner]）{
 [self.label setText：@Photo upload Success]; 
} else {
 [self.label setText：[result objectForKey：@name]]; 
} 
}; 
  

解决方案

  requestWithGraphPath：@YOUR_PHOTO_IDandDelegate：self]; 
  

然后在请求响应中，您将获得有关图片的所有信息。见这里的一个例子：



抓取您所需的信息，可能会对关键的源，并按需要使用它。 这是在FB开发过程中学习的好地方。

   - （void）request：（FBRequest *）request didLoad：（id）result {
 NSLog ％@，结果）; 
 NSArray * keys = [result allKeys]; 
 NSLog（@％@，keys）; 
 NSString * imageURL = [result objectForKey：@source]; 
 //这里可以使用此imageURL获取图像数据并在imageView中显示
} 
  

可能会让您了解如何排序不同的请求。

   - （void）请求：（FBRequest *）请求didLoad：（id）result {
 NSLog（@％@，result）; 
 NSString * requestType = [request.url stringByReplacingOccurrencesOfString：@https://graph.facebook.com/withString：@]; 
 if（[requestType isEqualToString：@me]）{
 //请求获取用户的资料信息
} 
 else if（[requestType isEqualToString：@me / picture ]）{
 //这是获取用户个人资料图片的请求
} 
} 
  

同样，您可以排序不同的请求，从而执行不同的请求特定任务。

Could you tell me how to use graph api to get the source url for a photo? Because I have the photo id and it seems like I should be able to make a call to get the source url.

As an example of what I'm trying to do, the following code works:

-(IBAction)showPicture:(UIButton *)sender;
{
    //code to retrieve picture

    id path = @"http://photos-e.ak.fbcdn.net/photos-ak-snc1/v5041/89/51/40796308305/a40796308305_1960517_6704612.jpg";
    NSURL *url = [NSURL URLWithString:path];
    NSData  *data = [NSData dataWithContentsOfURL:url];
    UIImage *img = [[UIImage alloc] initWithData:data];
    [self.label setText: (NSString *)path];
    imageView.image = img;
    [img release];

}

However that works when I have the source url. Is there a way to use graph api so that I can substitute id path = @"http://..." for something like id path = [_facebook requestWithGraphPath:@"98423808305/source" andDelegate:self]; ???

---

Updated to include request didLoad method

- (void)request:(FBRequest *)request didLoad:(id)result {


    if ([request.params objectForKey:@"picture"]) {
        // Get photo ID from result
        NSString *photoId = (NSString *)[result objectForKey:@"id"];
        shitStorm = photoId;
    }


  if ([result isKindOfClass:[NSArray class]]) {
    result = [result objectAtIndex:0];
  }
  if ([result objectForKey:@"owner"]) {
    [self.label setText:@"Photo upload Success"];
  } else {
    [self.label setText:[result objectForKey:@"name"]];
  }
};

解决方案

[_facebook requestWithGraphPath:@"YOUR_PHOTO_ID" andDelegate:self];

then in the request response you'll get every information about the picture. See an example here:
https://graph.facebook.com/98423808305
Grab your required info, might against the key "source", and use it as you want. http://developers.facebook.com/docs/reference/api/ this is a very good place to learn while developing with FB.

- (void)request:(FBRequest*)request didLoad:(id)result {
    NSLog(@"%@",result);
    NSArray *keys=[result allKeys];
    NSLog(@"%@",keys);
    NSString *imageURL=[result objectForKey:@"source"];
    //here you can use this imageURL to get image-data and display it in imageView
}

Might this will give you idea how to sort different requests.

- (void)request:(FBRequest*)request didLoad:(id)result{
    NSLog(@"%@",result);
    NSString *requestType =[request.url stringByReplacingOccurrencesOfString:@"https://graph.facebook.com/" withString:@""];
    if ([requestType isEqualToString:@"me"]) {
        //Request to get User's Profile info
    }
    else if ([requestType isEqualToString:@"me/picture"]) {
        //this is the request to get User's Profile Picture
    }
}

Similarly you can sort different requests and hence perform different request specific tasks.

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