Facebook 信息未填充 Parse 数据库
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【中文标题】Facebook 信息未填充 Parse 数据库【英文标题】:Facebook information not populating Parse database 【发布时间】:2013-07-26 17:12:55 【问题描述】:当用户在我的应用程序中通过 facebook 登录时,我会查询他们的照片和姓名,并使用该信息来填充 Core Data 和我的 Parse.com 后端。但是,它不起作用。这是做所有事情的代码:
#pragma mark - ()
- (IBAction)authButtonAction:(id)sender
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
// If the person is authenticated, log out when the button is clicked.
// If the person is not authenticated, log in when the button is clicked.
if (FBSession.activeSession.isOpen)
[appDelegate closeSession];
else
// The person has initiated a login, so call the openSession method
// and show the login UX if necessary.
[appDelegate openSessionWithAllowLoginUI:YES];
self.authButton.hidden = YES;
- (IBAction)toQuadAction:(id)sender
// Query to fetch the users name and picture
NSString *query = @"SELECT name, username FROM user WHERE uid=me() ";
// Set up the query parameter
NSDictionary *queryParam = [NSDictionary dictionaryWithObjectsAndKeys:query, @"q", nil];
// Make the API request that uses FQL
[FBRequestConnection startWithGraphpath:@"/fql" parameters:queryParam HTTPMethod:@"GET"
completionHandler:^(FBRequestConnection *connection,
id result,
NSError *error)
if (error)
NSLog(@"Error: %@", [error localizedDescription]);
else
NSLog(@"My name: %@", result[@"data"][0][@"name"]);
NSLog(@"My username: %@", result[@"data"][0][@"username"]);
//SAVE TO CORE DATA
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
NSEntityDescription *user = [NSEntityDescription entityForName:@"User" inManagedObjectContext:appDelegate.managedObjectContext];
NSFetchRequest *getName = [[NSFetchRequest alloc] init];
[getName setReturnsObjectsAsFaults:NO];
[getName setEntity:user];
NSError *error;
NSMutableArray *currentUser = [[appDelegate.managedObjectContext executeFetchRequest:getName error:&error] mutableCopy];
//SAVE THE NAME TO CORE DATA
[currentUser[0] setName:result[@"data"][0][@"name"]];
//SAVE NAME AND PICTURE TO PARSE
PFQuery *query = [PFQuery queryWithClassName:@"Student"];
[query whereKey:@"email" equalTo:[currentUser[0] valueForKey:@"email"]];
[query getFirstObjectInBackgroundWithBlock:^(PFObject *users, NSError *error)
if (!users)
NSLog(@"The first object request failed");
else
NSLog(@"grabbed the object");
//SET THE NAME IN PARSE
[users setObject:result[@"data"][0][@"name"] forKey:@"name"];
//SET THE IMAGE IN PARSE
NSString *URLString = [NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?width=235&height=385", result[@"data"][0][@"username"]];
NSURL *picURL = [NSURL URLWithString:URLString];
NSData *picData = [NSData dataWithContentsOfURL:picURL];
PFFile *picture = [PFFile fileWithData:picData ];
[users setObject:picture forKey:@"picture"];
[users saveInBackground];
];
[self performSegueWithIdentifier:@"facebookToQuad" sender:sender];
];
所以,有一个身份验证按钮。用户点击它并使用 Facebook 登录。然后出现另一个按钮,允许他们进入应用程序。当他们点击它时,我们会在他们的 Facebook 个人资料中查询图片和姓名,并将其添加到核心数据中,然后进行解析。但是,目前,这些存储系统都没有被填充。
【问题讨论】:
【参考方案1】:使用更多的空格,并声明更多的实例变量。打开您的代码,以便您更轻松地找到问题。
例如,取出值
result[@"data"][0][@"name"]
并将其分配给它自己的局部变量。
在 CoreData 中对您的实体进行子类化,因此使用 setter 和 getter 更容易管理属性分配。
然后设置断点并检查代码的每一步。
【讨论】:
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