傳遞Facebook朋友名稱到文本字段中的問題

Question

我正在選擇一個Facebook朋友。我想在啓動facebook朋友選擇器的文本框中顯示Facebook朋友的名字。

謝謝！

另外，是否有區別抓住用戶的字符串名稱和選擇朋友發送對象？因爲這就是用戶將要做的事情。所以，我需要顯示用戶名的字符串值，但我也必須將一個對象與該用戶關聯起來。

-(IBAction)cancelList; 
-(IBAction)submitList; 
-(IBAction)datePicker; 

@property (strong, nonatomic) IBOutlet UITextField *listFieldText; 
@property (strong, nonatomic) IBOutlet UITextField *dateFieldText; 
@property (strong, nonatomic) IBOutlet UITextField *wallPostText; 
@property (strong, nonatomic) IBOutlet UITextField *friendsName; 
@property (retain, nonatomic) UIDatePicker *pick; 
@property (strong, nonatomic) UIImage *profilePic; 

@property (retain, nonatomic) PF_FBFriendPickerViewController *friendPickerController; 

實現：

- (void)textFieldDidBeginEditing:(UITextField *)sender 
{ 
    sender.delegate = self; 
    if([sender isEqual:dateFieldText]) 
    { 
     UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] 
             initWithTitle:@"Save Date" 
             style:UIBarButtonItemStyleDone 
             target:self 
             action:@selector(datePicker)]; 
     self.navigationItem.rightBarButtonItem = doneButton; 
     pick = [[UIDatePicker alloc] init]; 
     [pick setFrame:CGRectMake(0,200,320,120)]; 
     //[pick addTarget:self action:@selector(done) forControlEvents:UIControlEventValueChanged]; 
     dateFieldText.delegate = self; 
     dateFieldText.inputView = pick; 
    } 
    else if ([sender isEqual:friendsName]) 
    { 
     NSLog(@"Pick a friend!"); 

     if (self.friendPickerController == nil) { 
      // Create friend picker, and get data loaded into it. 
      self.friendPickerController = [[PF_FBFriendPickerViewController alloc] init]; 
      self.friendPickerController.title = @"Select Friends"; 
      self.friendPickerController.delegate = self; 
      self.friendPickerController.allowsMultipleSelection = NO; 
     } 
     [self.friendPickerController loadData]; 
     [self.friendPickerController clearSelection]; 
     [self presentModalViewController:self.friendPickerController animated:YES]; 

    } 
    else{ 
     UIBarButtonItem *submitButton = [[UIBarButtonItem alloc] 
             initWithTitle:@"Done" 
             style:UIBarButtonItemStyleDone 
             target:self 
             action:@selector(submitList)]; //change this 


      self.navigationItem.rightBarButtonItem = submitButton; 

     } 
    } 

-(void)updateFriendTextField:(NSString*)subtitle 
{ 
    friendsName.text = subtitle; 
} 

/* 
-(void)updateSelections 
{ 
    NSString* friendsSubtitle = @"Selected friends"; 
    id<PF_FBGraphUser> friend = [self.selectedFriends objectAtIndex:0]; 
    friendsSubtitle = friend.name; 
    [self updateFriendTextField:friendsSubtitle]; 

    //[self handlePickerDone]; 
} 
*/ 

-(void)friendPickerViewControllerDataDidChange:(PF_FBFriendPickerViewController *)friendPicker { 
    NSLog(@"Current friend selections: %@", friendPicker.selection); 

} 

- (void)dealloc 
{ 
    friendPickerController.delegate = nil; 
} 

- (void)facebookViewControllerCancelWasPressed:(id)sender 
{ 
    [self.presentingViewController dismissViewControllerAnimated:YES completion:nil]; 
    NSLog(@"Friend selection cancelled."); 
    //[self handlePickerDone]; 
} 

- (void)facebookViewControllerDoneWasPressed:(id)sender 
{ 

    NSLog(@"Done was pressed."); 
    //[self updateSelections]; 
    [self.presentingViewController dismissViewControllerAnimated:YES completion:nil]; 
} 

Answer 1

您可以將其從friendPicker.selection保存在您的某個代理方法（friendPickerViewControllerSelectionDidChange或friendPickerViewControllerDataDidChange）中。

數組中的項目是PF_FBGraphUser對象，所以無論你從PF_FBGraphUser需要你可以將它們保存和使用：

@property (retain, nonatomic) NSString *id; 
@property (retain, nonatomic) NSString *name; 
@property (retain, nonatomic) NSString *first_name; 
@property (retain, nonatomic) NSString *middle_name; 
@property (retain, nonatomic) NSString *last_name; 
@property (retain, nonatomic) NSString *link; 
@property (retain, nonatomic) NSString *username; 
@property (retain, nonatomic) NSString *birthday; 
@property (retain, nonatomic) id<PF_FBGraphPlace> location; 

Answer 2

對於這個答案多種解決方案。

就我個人而言，我喜歡使用全局標題，因爲它從我的角度來看是最高效的。

我將創建一個頭文件，並將其命名爲「global.h」

在該頭文件，我將創建以下文件：

NSString* friendsName;
NSString* wallPostText;
NSString* dateFieldText;
NSString* listFieldText;


接下來，我將在初始化這些對象應用程序的委託時，應用程序首先通過簡單地調用friendsName = @"friend";

後來，當你真正從選擇收到朋友的名字，保存名字到是全局變量，frien剛剛推出DSNAME！

記得#import「global.h」到需要訪問這些變量的所有類中！

第二種方法是在你希望訪問這些變量的類中創建一個局部變量。

@property(nonatomic) NSString *friendsName;

當你正在推動新的UIViewController，可以通過正確的初始化後通過它像這樣：

ViewControllerB *viewControllerB = [[ViewControllerB alloc] initWithNib:@"ViewControllerB" bundle:nil];
viewControllerB.friendsName = "Mark";
[self pushViewController:viewControllerB animated:YES];


希望這有助於！