FBFriendPickerViewController - Documentazione

FBFriendPickerViewController

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The FBFriendPickerViewController class creates a controller object that manages the user interface for displaying and selecting Facebook friends.

Discussion:

When the FBFriendPickerViewController view loads it creates a UITableView object where the friends will be displayed. You can access this view through the tableView property. The friend display can be sorted by first name or last name. Friends' names can be displayed with the first name first or the last name first.

The friend data can be pre-fetched and cached prior to using the view controller. The cache is setup using an FBCacheDescriptor object that can trigger the data fetch. Any friend data requests will first check the cache and use that data. If the friend picker is being displayed cached data will initially be shown before a fresh copy is retrieved.

The delegate property may be set to an object that conforms to the FBFriendPickerDelegate protocol. The delegate object will receive updates related to friend selection and data changes. The delegate can also be used to filter the friends to display in the picker.

Inherits from:	`FBViewController`
Declared in:	`FBFriendPickerViewController.h`

Proprietà

allowsMultipleSelection

A Boolean value that specifies whether multi-select is enabled.

@property (nonatomic) BOOL allowsMultipleSelection;

Tipo dichiarato in: FBFriendPickerViewController.h

displayOrdering

The order in which friends' names are displayed.

@property (nonatomic) FBFriendDisplayOrdering displayOrdering;

Tipo dichiarato in: FBFriendPickerViewController.h

fieldsForRequest

Addtional fields to fetch when making the Graph API call to get friend data.

@property (nonatomic,
    copy) NSSet *fieldsForRequest;

Tipo dichiarato in: FBFriendPickerViewController.h

itemPicturesEnabled

A Boolean value that indicates whether friend profile pictures are displayed.

@property (nonatomic) BOOL itemPicturesEnabled;

Tipo dichiarato in: FBFriendPickerViewController.h

selection

The list of friends that are currently selected in the veiw. The items in the array are FBGraphUser objects.

@property (nonatomic,
    copy) NSArray *selection;

Discussion:

You can set this this array to pre-select items in the picker. The objects in the array must be complete idFBGraphUser objects (i.e., fetched from a Graph query or from a previous picker's selection, with id and appropriate name fields).

Tipo dichiarato in: FBFriendPickerViewController.h

session

The session that is used in the request for friend data.

@property (nonatomic,
    retain) FBSession *session;

Tipo dichiarato in: FBFriendPickerViewController.h

sortOrdering

The order in which friends are sorted in the display.

@property (nonatomic) FBFriendSortOrdering sortOrdering;

Tipo dichiarato in: FBFriendPickerViewController.h

spinner

Returns an outlet for the spinner used in the view controller.

@property (nonatomic,
    retain) IBOutlet UIActivityIndicatorView *spinner;

Tipo dichiarato in: FBFriendPickerViewController.h

tableView

Returns an outlet for the table view managed by the view controller.

@property (nonatomic,
    retain) IBOutlet UITableView *tableView;

Tipo dichiarato in: FBFriendPickerViewController.h

userID

The profile ID of the user whose friends are being viewed.

@property (nonatomic,
    copy) NSString *userID;

Tipo dichiarato in: FBFriendPickerViewController.h

Metodi di classe

cacheDescriptor

Creates a cache descriptor based on default settings of the FBFriendPickerViewController object.

+ (FBCacheDescriptor *) cacheDescriptor;

Discussion:

An FBCacheDescriptor object may be used to pre-fetch data before it is used by the view controller. It may also be used to configure the FBFriendPickerViewController object.

Tipo dichiarato in: FBFriendPickerViewController.h

cacheDescriptorWithUserID:fieldsForRequest:

Creates a cache descriptor with additional fields and a profile ID for use with the FBFriendPickerViewController object.

Parametro	Descrizione
`userID`	The profile ID of the user whose friends will be displayed. A nil value implies a "me" alias.
`fieldsForRequest`	The set of additional fields to include in the request for friend data.

+ (FBCacheDescriptor *)

`cacheDescriptorWithUserID:`	`(NSString *)userID`
`fieldsForRequest:`	`(NSSet *)fieldsForRequest;`

Discussion:

An FBCacheDescriptor object may be used to pre-fetch data before it is used by the view controller. It may also be used to configure the FBFriendPickerViewController object.

Tipo dichiarato in: FBFriendPickerViewController.h

Metodi di istanza

clearSelection

Clears the current selection, so the picker is ready for a fresh use.

- (void) clearSelection;

Tipo dichiarato in: FBFriendPickerViewController.h

configureUsingCachedDescriptor:

Configures the properties used in the caching data queries.

Parametro	Descrizione
`cacheDescriptor`	The containing the cache query properties.

- (void) configureUsingCachedDescriptor:(FBCacheDescriptor *)cacheDescriptor;

Discussion:

Cache descriptors are used to fetch and cache the data used by the view controller. If the view controller finds a cached copy of the data, it will first display the cached content then fetch a fresh copy from the server.

Tipo dichiarato in: FBFriendPickerViewController.h

initWithCoder:

Initializes a friend picker view controller.

Parametro	Descrizione
`aDecoder`	An unarchiver object.

- (instancetype) initWithCoder:(NSCoder *)aDecoder;

Tipo dichiarato in: FBFriendPickerViewController.h

initWithNibName:bundle:

Used to initialize the object

Parametro	Descrizione
`nibNameOrNil`	The name of the nib file to associate with the view controller. The nib file name should not contain any leading path information. If you specify nil, the nibName property is set to nil.
`nibBundleOrNil`	The bundle in which to search for the nib file. This method looks for the nib file in the bundle's language-specific project directories first, followed by the Resources directory. If nil, this method looks for the nib file in the main bundle.

- (instancetype)

`initWithNibName:`	`(NSString *)nibNameOrNil`
`bundle:`	`(NSBundle *)nibBundleOrNil;`

Tipo dichiarato in: FBFriendPickerViewController.h

loadData

Initiates a query to get friend data.

- (void) loadData;

Discussion:

A cached copy will be returned if available. The cached view is temporary until a fresh copy is retrieved from the server. It is legal to call this more than once.

Tipo dichiarato in: FBFriendPickerViewController.h

updateView

Updates the view locally without fetching data from the server or from cache.

- (void) updateView;

Discussion:

Use this if the filter or sort properties change. This may affect the order or display of friend information but should not need require new data.

Tipo dichiarato in: FBFriendPickerViewController.h

Typedef

NS_ENUM (NSUInteger, FBFriendDisplayOrdering)

Indicates whether friends should be displayed first-name-first or last-name-first.

typedef NS_ENUM(NSUInteger, FBFriendDisplayOrdering) { 
    FBFriendDisplayByFirstName = 0, 
    FBFriendDisplayByLastName, 
};

Costante	Descrizione
`FBFriendDisplayByFirstName`	Display friends as First Middle Last.
`FBFriendDisplayByLastName`	Display friends as Last First Middle.

Tipo dichiarato in: FBFriendPickerViewController.h

NS_ENUM (NSUInteger, FBFriendSortOrdering)

Indicates the order in which friends should be listed in the friend picker.

typedef NS_ENUM(NSUInteger, FBFriendSortOrdering) { 
    FBFriendSortByFirstName = 0, 
    FBFriendSortByLastName 
};

Costante	Descrizione
`FBFriendSortByFirstName`	Sort friends by first, middle, last names.
`FBFriendSortByLastName`	Sort friends by last, first, middle names.

Tipo dichiarato in: FBFriendPickerViewController.h