在iOS上使用Facebook的图形API [英] Using Facebook Graph API on iOS
问题描述
这是我的第一个计算器后，但我用这个很长一段时间...
This is my first post on StackOverflow but i use this for a long time...
我的问题是基本的简单，我想分享一个 UITextView的（mShareText）的含量用户的墙上没有任何提示对话框。基本上，用户必须填写在的UITextView 的消息，然后点击一个<大骨节病>后的UIButton。简单是不是？
My problem is basically simple, I want to share the content of a UITextView(mShareText) on the user's wall without prompting any Dialog. Basically, the user has to fill its message on the UITextView and then click on a "post" UIButton. Simple isn't it ?
我已经下载了Facebook的iOS版SDK并将它复制到我的项目。我已经包括了 FBConnect.h ，并在我的控制器的头文件 Facebook.h ，并创建了一个变种： Facebook的Facebook的* ;,该控制器还实现了以下代表：FBSessionDelegate，FBRequestDelegate
I've downloaded the Facebook iOS SDK and copied it into my project. I've included "FBConnect.h" and "Facebook.h" on my controller's header file and created a var : Facebook* facebook;, the controller also implements the following delegates : FBSessionDelegate, FBRequestDelegate.
在我的控制器的实现文件中，我有一个IBAction为触发，当用户点击发布的UIButton。
On my controller's implementation file, I've a IBAction triggered when the user clicks on the "post" UIButton.
- (IBAction)onShareByFBPressed:(id)sender {
NSLog(@"onShareByFBPressed");
// Facebook settings
NSMutableDictionary* params = [[NSMutableDictionary alloc] initWithCapacity:3];
[params setObject:mShareText.text forKey:@"message"];
[params setObject:@"http://www.mysite.com" forKey:@"link"];
[params setObject:@"https://www.mysite.com/myImg.jpg" forKey:@"picture"];
[facebook requestWithGraphPath:@"me/feed"
andParams:params
andHttpMethod:@"POST"
andDelegate:self];
[params release];
}
我已经在我的viewDidLoad中实现这一点：
I've implemented this on my viewdidload:
- (void)viewDidLoad
{
NSLog(@"viewDidLoad");
[super viewDidLoad];
(...)
// Test facebook
facebook = [[Facebook alloc] initWithAppId:@"XXXXXXXXXXX" andDelegate:self];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"]) {
facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
NSLog(@"AccessToken: %@ ExpirationDate: %@", facebook.accessToken, facebook.expirationDate);
}else{
NSLog(@"No AccessToken or ExpirationDate");
}
if (![facebook isSessionValid]) {
[facebook authorize:[NSArray arrayWithObjects:@"publish_stream", nil]];
}
}
下面是由于代表不同的方法，我不得不实施
Here are different methods I had to implement due to the delegates :
// Pre 4.2 support
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
return [facebook handleOpenURL:url];
}
// For 4.2+ support
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
return [facebook handleOpenURL:url];
}
- (void)fbDidLogin {
NSLog(@"fbDidLogin");
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:[facebook accessToken] forKey:@"FBAccessTokenKey"];
[defaults setObject:[facebook expirationDate] forKey:@"FBExpirationDateKey"];
[defaults synchronize];
}
- (void)fbSessionInvalidated{
NSLog(@"fbSessionInvalidated");
}
- (void)fbDidLogout{
NSLog(@"fbDidLogout");
}
- (void)fbDidExtendToken:(NSString*)accessToken expiresAt:(NSDate*)expiresAt{
NSLog(@"fbDidExtendToken");
}
- (void)fbDidNotLogin:(BOOL)cancelled{
NSLog(@"fbDidNotLogin");
}
- (void)request:(FBRequest *)request didReceiveResponse:(NSURLResponse *)response{
NSLog(@"didReceiveResponse: %@", response);
}
- (void)request:(FBRequest *)request didFailWithError:(NSError *)error{
NSLog(@"didFailWithError: %@", [error description]);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Share on Facebook"
message:@"An error occured"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
}
可惜的是，每次我尝试触发我的onShareByFB pressed的方法，我在日志中出现以下错误：
Unfortunatelly, everytime I try to trigger my "onShareByFBPressed" method, I got the following error on the log:
2012-02-17 13:02:06.401 Mixtapes[935:707] didFailWithError: Error Domain=facebookErrDomain Code=10000 "The operation couldn’t be completed. (facebookErrDomain error 10000.)" UserInfo=0x1f6f60 {error=<CFBasicHash 0x1f6660 [0x3ec6d630]>{type = mutable dict, count = 3,
entries =>
2 : <CFString 0x1f64a0 [0x3ec6d630]>{contents = "type"} = <CFString 0x1f6b10 [0x3ec6d630]>{contents = "OAuthException"}
3 : <CFString 0x1f6ab0 [0x3ec6d630]>{contents = "message"} = <CFString 0x1f6a10 [0x3ec6d630]>{contents = "An active access token must be used to query information about the current user."}
6 : <CFString 0x1f6e60 [0x3ec6d630]>{contents = "code"} = 2500
}
}
谁能告诉我有什么错我的执行？
Can anyone tell me what's wrong with my implementation ??
非常感谢。
最好的问候。
编辑：
@Adil
@Adil
谢谢你的建议。它的实际工作somethimes。
Thanks for your proposal. It actually works somethimes.
有时候，我得到了以下错误：
Sometimes i got the following error :
didFailWithError: Error Domain=facebookErrDomain Code=10000 "The operation couldn’t be completed. (facebookErrDomain error 10000.)" UserInfo=0xa17e0d0 {error=<CFBasicHash 0xa171e10 [0x3ec6d630]>{type = mutable dict, count = 3,
entries =>
2 : <CFString 0xa179d10 [0x3ec6d630]>{contents = "type"} = <CFString 0xa17a280 [0x3ec6d630]>{contents = "OAuthException"}
3 : <CFString 0x6127710 [0x3ec6d630]>{contents = "message"} = <CFString 0xa178db0 [0x3ec6d630]>{contents = "Error validating access token: Session is invalid. This could be because the application was uninstalled after the session was created."}
6 : <CFString 0xa17e020 [0x3ec6d630]>{contents = "code"} = 190
}
}
感谢您的帮助。
推荐答案
这里的问题是：
这是authororized Facebook的是的AppDelegate 的Facebook对象，而不是你的的ViewController 的Facebook。
The facebook which is authororized is AppDelegate's facebook object, not your ViewController's facebook.
解决方案：
而不是分配每的ViewController 或你需要新的的Facebook 对象。
你应该让你的应用程序委托的属性。像这样的：
Instead allocating new Facebook object for every ViewController or where you needed.
you should make a property of your application delegate. like this:
在appDelegate.h
in appDelegate.h
@property(nonatomic, retain) Facebook *facebook;
和合成它在appDelegate.m现在把Facebook的初始化在
and synthesize it in appDelegate.m and now put initialization of Facebook in
- (BOOL)application:(UIApplication *)ap didFinishLaunchingWithOptions:(NSDictionary *)op
{
// other code....
facebook = [[Facebook alloc] initWithAppId:@"XXXXXXXXXXX" andDelegate:self];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"]) {
facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
NSLog(@"AccessToken: %@ ExpirationDate: %@", facebook.accessToken, facebook.expirationDate);
}else{
NSLog(@"No AccessToken or ExpirationDate");
}
return true;
}
现在你想使用它，这样写在哪里：
now where do you want to use it, write something like this:
- (void)viewDidLoad
{
[super viewDidLoad];
//...
AppDelegate *app = (AppDelegate *)[[UIApplication sharedApplication] delegate];
facebook = app.facebook;
if (![facebook isSessionValid]) {
[facebook authorize:[NSArray arrayWithObjects:@"publish_stream", nil]];
}
}
这篇关于在iOS上使用Facebook的图形API的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
