我已经开发了对你很有帮助的包装类。
首先下载Facebook最新的SDK。
创建一个名为“FacebookHelper”的类
在 .h 文件中添加以下代码：
#import <Foundation/Foundation.h>
#import "FBConnect.h"
@protocol FBApiCallDelegate;
typedef enum FBApiCallType
{
FBApiCallNone = 0,
FBApiCallGetUserInfo = 1,
FBApiCallGetUserFriend = 2,
FBApiCallPostMessage = 3,
FBApiCallPostPicture = 4,
FBApiCallShareLink = 5,
FBApiCallPostAll = 6,
FBApiCallPostMessageFriendWall = 7
} FBApiCallType;
@interface FacebookHelper : NSObject<FBRequestDelegate, FBDialogDelegate, FBSessionDelegate> {
Facebook *objFacebook;
NSArray *arrPermission;
id<FBApiCallDelegate> apiCallDelegate;
FBApiCallType currentApiCallType;
NSString *strMessage;
NSString *strUrlTitle;
NSString *strUrl;
NSString *strCaption;
NSString *strPictureUrl;
UIImage *image;
}
@property(readonly) Facebook *objFacebook;
@property (nonatomic, assign) id<FBApiCallDelegate> apiCallDelegate;
@property (nonatomic, assign) FBApiCallType currentApiCallType;
@property (nonatomic, retain) NSString *strMessage;
@property (nonatomic, retain) NSString *strUrlTitle;
@property (nonatomic, retain) NSString *strUrl;
@property (nonatomic, retain) NSString *strCaption;
@property (nonatomic, retain) NSString *strPictureUrl;
@property (nonatomic, retain) UIImage *image;
+ (FacebookHelper *) sharedInstance;
- (void)releaseObjects;
//Store Authentication
- (void)storeAuthData:(NSString *)accessToken expiresAt:(NSDate *)expiresAt;
- (void)removeAuthData;
//Public Methods
-(BOOL)isLoggedIn;
-(void)loginToFacebook;
-(void)logoutFromFacebook;
//Facebook Methods
-(void)getUserInfo; //Get User Info
-(void)getUserFriends; //Get User's Friend List
-(void)postMessageToWall; //Post Message to FB Wall
-(void)postPictureToWall; //Post Picture to FB Wall
-(void)shareLinkOnWall; //Share Link on FB Wall
-(void)postAllToWall; //Post All - Message, Link, Caption, PhotoUrl
-(void)postMessageToFriendWall; //Post Message to Friend Wall
//String Methods
- (BOOL)isEmptyString:(NSString *)strValue;
- (NSString *) trimWhiteSpace:(NSString *)strValue;
// Default AlertView
-(void)showAlertView:(NSString *)pstrTitle withMessage:(NSString *)pstrMessage delegate:(id)pDelegate;
@end
@protocol FBApiCallDelegate <NSObject>
@optional
//Get User Info Delegate
-(void)finishUserInfoResponse:(id)result;
-(void)failedUserInfoResponse:(NSError *)error;
//Get User's Friend List
-(void)finishUserFriendResponse:(id)result;
-(void)failedUserFriendResponse:(NSError *)error;
//Post Message to FB Wall Delegate
-(void)finishPostMessageResponse:(id)result;
-(void)failedPostMessageResponse:(NSError *)error;
//Post Picture to FB Wall
-(void)finishPostPictureResponse:(id)result;
-(void)failedPostPictureResponse:(NSError *)error;
//Share Link on FB Wall
-(void)finishShareLinkResponse:(id)result;
-(void)failedShareLinkResponse:(NSError *)error;
//Post All - Message, Link, Caption, PhotoUrl
-(void)finishPostAllResponse:(id)result;
-(void)failedPostAllResponse:(NSError *)error;
//Post Message to Friend Wall Delegate
-(void)finishPostMsgFriendWallResponse:(id)result;
-(void)failedPostMsgFriendWallResponse:(NSError *)error;
@end
在 .m 文件中添加以下代码：
#import "FacebookHelper.h"
@implementation FacebookHelper
@synthesize objFacebook;
@synthesize apiCallDelegate, currentApiCallType;
@synthesize strMessage, strUrlTitle, strUrl, strCaption, strPictureUrl, image;
#pragma mark -
#pragma mark Singleton Variables
static FacebookHelper *singletonHelper = nil;
#pragma mark -
#pragma mark Singleton Methods
- (id)init {
if (!g_kFacebookAppId) {
NSLog(@"%@", msgFBAppIDMissing);
exit(1);
return nil;
}
if ((self = [super init])) {
arrPermission = [[NSArray arrayWithObjects: @"read_stream", @"publish_stream", @"offline_access", @"email", @"read_friendlists", @"friends_birthday",nil] retain];
}
return self;
}
+ (FacebookHelper *)sharedInstance {
@synchronized(self) {
if (singletonHelper == nil) {
[[self alloc] init]; // assignment not done here
}
}
return singletonHelper;
}
+ (id)allocWithZone:(NSZone *)zone {
@synchronized(self) {
if (singletonHelper == nil) {
singletonHelper = [super allocWithZone:zone];
// assignment and return on first allocation
return singletonHelper;
}
}
// on subsequent allocation attempts return nil
return nil;
}
- (id)copyWithZone:(NSZone *)zone {
return self;
}
- (id)retain {
return self;
}
- (unsigned)retainCount {
return UINT_MAX; // denotes an object that cannot be released
}
//- (void)release {
- (void)dealloc {
[self releaseObjects];
[super dealloc];
}
- (id)autorelease {
return self;
}
- (void)releaseObjects {
[self.strMessage release];
[self.strUrlTitle release];
[self.strUrl release];
[self.strCaption release];
[self.strPictureUrl release];
[self.image release];
[objFacebook release];
objFacebook = nil;
}
#pragma mark -
#pragma mark FBDelegate(FBSessionDelegate) Methods
/**
* Called when the user has logged in successfully.
*/
- (void)fbDidLogin {
NSLog(@"FB login OK");
[self storeAuthData:objFacebook.accessToken expiresAt:objFacebook.expirationDate];
switch(currentApiCallType)
{
case FBApiCallGetUserInfo:
[self getUserInfo];
break;
case FBApiCallGetUserFriend:
[self getUserFriends];
break;
case FBApiCallPostMessage:
[self postMessageToWall];
break;
case FBApiCallPostPicture:
[self postPictureToWall];
break;
case FBApiCallShareLink:
[self shareLinkOnWall];
break;
case FBApiCallPostAll:
[self postAllToWall];
break;
case FBApiCallPostMessageFriendWall:
[self postMessageToFriendWall];
break;
}
}
/**
* Called when the user canceled the authorization dialog.
*/
-(void)fbDidNotLogin:(BOOL)cancelled {
NSLog(@"FB did not login");
[self removeAuthData];
}
/**
* Called when the request logout has succeeded.
*/
- (void)fbDidLogout {
NSLog(@"FB logout OK");
[self removeAuthData];
}
-(void)fbDidExtendToken:(NSString *)accessToken expiresAt:(NSDate *)expiresAt {
NSLog(@"token extended");
[self storeAuthData:accessToken expiresAt:expiresAt];
}
/**
* Called when the session has expired.
*/
- (void)fbSessionInvalidated {
[self showAlertView:msgFBSessionInvalidateTitle withMessage:msgFBSessionInvalidateMessage delegate:nil];
[self fbDidLogout];
}
#pragma mark -
#pragma mark FBRequestDelegate Methods
/**
* Called when the Facebook API request has returned a response. This callback
* gives you access to the raw response. It's called before
* (void)request:(FBRequest *)request didLoad:(id)result,
* which is passed the parsed response object.
*/
- (void)request:(FBRequest *)request didReceiveResponse:(NSURLResponse *)response {
NSLog(@"received response");
}
/**
* Called when a request returns and its response has been parsed into
* an object. The resulting object may be a dictionary, an array, a string,
* or a number, depending on the format of the API response. If you need access
* to the raw response, use:
*
* (void)request:(FBRequest *)request
* didReceiveResponse:(NSURLResponse *)response
*/
- (void)request:(FBRequest *)request didLoad:(id)result {
NSLog(@"FB request OK");
switch(currentApiCallType)
{
case FBApiCallGetUserInfo:
if([self.apiCallDelegate respondsToSelector:@selector(finishUserInfoResponse:)])
[self.apiCallDelegate finishUserInfoResponse:result];
break;
case FBApiCallGetUserFriend:
if ([self.apiCallDelegate respondsToSelector:@selector(finishUserFriendResponse:)])
[self.apiCallDelegate finishUserFriendResponse:result];
break;
case FBApiCallPostMessage:
if ([self.apiCallDelegate respondsToSelector:@selector(finishPostMessageResponse:)])
[self.apiCallDelegate finishPostMessageResponse:result];
break;
case FBApiCallPostPicture:
if ([self.apiCallDelegate respondsToSelector:@selector(finishPostPictureResponse:)])
[self.apiCallDelegate finishPostPictureResponse:result];
break;
case FBApiCallShareLink:
if ([self.apiCallDelegate respondsToSelector:@selector(finishShareLinkResponse:)])
[self.apiCallDelegate finishShareLinkResponse:result];
break;
case FBApiCallPostAll:
if ([self.apiCallDelegate respondsToSelector:@selector(finishPostAllResponse:)])
[self.apiCallDelegate finishPostAllResponse:result];
break;
case FBApiCallPostMessageFriendWall:
if ([self.apiCallDelegate respondsToSelector:@selector(finishPostMsgFriendWallResponse:)])
[self.apiCallDelegate finishPostMsgFriendWallResponse:result];
break;
}
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
currentApiCallType = FBApiCallNone;
}
/**
* Called when an error prevents the Facebook API request from completing
* successfully.
*/
/*- (void)request:(FBRequest *)request didFailWithError:(NSError *)error {
NSLog(@"FB error: %@", [error localizedDescription]);
}*/
- (void)request:(FBRequest *)request didFailWithError:(NSError *)error {
NSLog(@"Err message: %@", [[error userInfo] objectForKey:@"error_msg"]);
/*NSLog(@"Err code: %@", [error code]);
NSLog(@"Err desc: %@", [error description]);
NSLog(@"FB error: %@", [error localizedDescription]);*/
switch(currentApiCallType)
{
case FBApiCallGetUserInfo:
if ([self.apiCallDelegate respondsToSelector:@selector(failedUserInfoResponse:)])
[self.apiCallDelegate failedUserInfoResponse:error];
break;
case FBApiCallGetUserFriend:
if ([self.apiCallDelegate respondsToSelector:@selector(failedUserFriendResponse:)])
[self.apiCallDelegate failedUserFriendResponse:error];
break;
case FBApiCallPostMessage:
if ([self.apiCallDelegate respondsToSelector:@selector(failedPostMessageResponse:)])
[self.apiCallDelegate failedPostMessageResponse:error];
break;
case FBApiCallPostPicture:
if ([self.apiCallDelegate respondsToSelector:@selector(failedPostPictureResponse:)])
[self.apiCallDelegate failedPostPictureResponse:error];
break;
case FBApiCallShareLink:
if ([self.apiCallDelegate respondsToSelector:@selector(failedShareLinkResponse:)])
[self.apiCallDelegate failedShareLinkResponse:error];
break;
case FBApiCallPostAll:
if ([self.apiCallDelegate respondsToSelector:@selector(failedPostAllResponse:)])
[self.apiCallDelegate failedPostAllResponse:error];
case FBApiCallPostMessageFriendWall:
if ([self.apiCallDelegate respondsToSelector:@selector(failedPostMsgFriendWallResponse:)])
[self.apiCallDelegate failedPostMsgFriendWallResponse:error];
break;
}
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
currentApiCallType = FBApiCallNone;
}
/**
* Called when a UIServer Dialog successfully return.
*/
- (void)dialogDidComplete:(FBDialog *)dialog {
NSLog(@"Published successfully on FB");
}
#pragma mark -
#pragma mark Store/Remove Authentication
- (void)storeAuthData:(NSString *)accessToken expiresAt:(NSDate *)expiresAt {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:accessToken forKey:g_kFacebookAccessToken];
[defaults setObject:expiresAt forKey:g_kFacebookExpirationDate];
[defaults synchronize];
}
- (void)removeAuthData{
// Remove saved authorization information if it exists and it is
// ok to clear it (logout, session invalid, app unauthorized)
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults removeObjectForKey:g_kFacebookAccessToken];
[defaults removeObjectForKey:g_kFacebookExpirationDate];
[defaults synchronize];
/*
[[NSUserDefaults standardUserDefaults] setObject:@"" forKey:g_kFacebookAccessToken];
[[NSUserDefaults standardUserDefaults] setObject:@"" forKey:g_kFacebookExpirationDate];
[[NSUserDefaults standardUserDefaults] synchronize];*/
/*
[[NSUserDefaults standardUserDefaults] setObject:nil forKey:g_kFacebookAccessToken];
[[NSUserDefaults standardUserDefaults] setObject:nil forKey:g_kFacebookExpirationDate];
[[NSUserDefaults standardUserDefaults] synchronize];*/
}
#pragma mark -
#pragma mark Public Methods
-(BOOL)isLoggedIn
{
if(objFacebook == nil)
objFacebook = [[[Facebook alloc] initWithAppId:g_kFacebookAppId andDelegate:self] retain];
NSString *strAccessToken = [[NSUserDefaults standardUserDefaults] stringForKey:g_kFacebookAccessToken];
NSLog(@"Access Token = %@", strAccessToken);
//if(![strAccessToken isEmptyString])
if(![self isEmptyString:strAccessToken])
{
objFacebook.accessToken = [[NSUserDefaults standardUserDefaults] stringForKey:g_kFacebookAccessToken];
objFacebook.expirationDate = (NSDate *) [[NSUserDefaults standardUserDefaults] objectForKey:g_kFacebookExpirationDate];
}
if([objFacebook isSessionValid])
return YES;
else
return NO;
return NO;
}
-(void)loginToFacebook
{
if(![self isLoggedIn])
[objFacebook authorize:arrPermission];
}
-(void)logoutFromFacebook {
[objFacebook logout:self];
[self removeAuthData];
[self releaseObjects];
}
#pragma mark -
#pragma mark Facebook Methods
-(void)getUserInfo
{
currentApiCallType = FBApiCallGetUserInfo;
if([self isLoggedIn])
{
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"name,picture",@"fields",nil];
[objFacebook requestWithGraphPath:@"me" andParams:params andDelegate:self];
}
else
[self loginToFacebook];
}
-(void)getUserFriends
{
currentApiCallType = FBApiCallGetUserFriend;
if([self isLoggedIn])
{
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"picture,id,name,birthday,link,gender,last_name,first_name",@"fields",nil];
[objFacebook requestWithGraphPath:@"me/friends" andParams:params andDelegate:self];
}
else
[self loginToFacebook];
}
-(void)postMessageToWall
{
currentApiCallType = FBApiCallPostMessage;
if([self isLoggedIn])
{
NSMutableDictionary *params = [[[NSMutableDictionary alloc] init] autorelease];
[params setObject:@"status" forKey:@"type"];
[params setObject:self.strMessage forKey:@"message"];
[objFacebook requestWithGraphPath:@"me/feed" andParams:params andHttpMethod:@"POST" andDelegate:self];
}
else
[self loginToFacebook];
}
-(void)postPictureToWall
{
currentApiCallType = FBApiCallPostPicture;
if([self isLoggedIn])
{
NSMutableDictionary *params = [[[NSMutableDictionary alloc] init] autorelease];
[params setObject:self.image forKey:@"source"];
[params setObject:self.strMessage forKey:@"message"];
[objFacebook requestWithGraphPath:@"me/photos" andParams:params andHttpMethod:@"POST" andDelegate:self];
}
else
[self loginToFacebook];
}
-(void)shareLinkOnWall
{
currentApiCallType = FBApiCallShareLink;
if([self isLoggedIn])
{
NSMutableDictionary *params = [[[NSMutableDictionary alloc] init] autorelease];
[params setObject:@"link" forKey:@"type"];
[params setObject:self.strUrl forKey:@"link"];
[params setObject:self.strMessage forKey:@"description"];
[objFacebook requestWithGraphPath:@"me/feed" andParams:params andHttpMethod:@"POST" andDelegate:self];
}
else
[self loginToFacebook];
}
-(void)postAllToWall
{
currentApiCallType = FBApiCallPostAll;
if([self isLoggedIn])
{
NSMutableDictionary *params = [[[NSMutableDictionary alloc] init] autorelease];
[params setObject:self.strMessage forKey:@"description"];
[params setObject:self.strUrlTitle forKey:@"name"];
[params setObject:self.strUrl forKey:@"link"];
[params setObject:self.strCaption forKey:@"caption"];
[params setObject:self.strPictureUrl forKey:@"picture"];
[objFacebook requestWithGraphPath:@"me/feed" andParams:params andHttpMethod:@"POST" andDelegate:self];
}
else
[self loginToFacebook];
}
-(void)postMessageToFriendWall
{
currentApiCallType = FBApiCallPostMessageFriendWall;
if([self isLoggedIn])
{
NSString *strGraphPath = [NSString stringWithFormat:@"%@/feed", @"100002305497328"];
//NSString *strGraphPath = [NSString stringWithFormat:@"%@/feed", @"100002560928461"];
NSMutableDictionary *params = [[[NSMutableDictionary alloc] init] autorelease];
[params setObject:self.strMessage forKey:@"message"];
[objFacebook requestWithGraphPath:strGraphPath andParams:params andHttpMethod:@"POST" andDelegate:self];
}
else
[self loginToFacebook];
}
#pragma mark -
#pragma mark String Methods
- (BOOL)isEmptyString:(NSString *)strValue
{
NSString *copy;
if (strValue == nil)
return (YES);
if ([strValue isEqualToString:@""])
return (YES);
if ([strValue isEqualToString:@"(null)"])
return (YES);
copy = [[strValue copy] autorelease];
//if ([[copy trimWhiteSpace] isEqualToString: @""])
if ([[self trimWhiteSpace:copy] isEqualToString: @""])
return (YES);
return (NO);
} /*stringIsEmpty*/
- (NSString *) trimWhiteSpace:(NSString *)strValue
{
NSMutableString *s = [[strValue mutableCopy] autorelease];
CFStringTrimWhitespace ((CFMutableStringRef) s);
return (NSString *) [[s copy] autorelease];
} /*trimWhiteSpace*/
#pragma mark -
#pragma mark Default AlertView
-(void)showAlertView:(NSString *)pstrTitle withMessage:(NSString *)pstrMessage delegate:(id)pDelegate
{
UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:pstrTitle message:pstrMessage delegate:pDelegate cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alertView show];
[alertView release];
}
@end
就是这样。现在我们的 Facebook 包装类已经准备好了。
在班级下面创建 3 个以便更好地组织。
FacebookGlobal.h
添加以下数据：
#define g_kFacebookAppId @"<Your AppID>"
#define g_kFacebookAppSecret @"<Your Secret>"
#define g_kPostMessage @"<Message>"
#define g_kPostUrlTitle @"<Title>"
#define g_kPostUrl @"<Url>"
#define g_kPostCaption @"<Caption>"
#define g_kPostPictureUrl @"<Image Url>"
FacebookKey.h
添加以下数据：
#define g_kFacebookAccessToken @"FBAccessTokenKey"
#define g_kFacebookExpirationDate @"FBExpirationDateKey"
FacebookMessage.h
添加以下数据：
//AppID Missing
#define msgFBAppIDMissing @"Missing AppID"
//Session Invalidated
#define msgFBSessionInvalidateTitle @"Auth Exception"
#define msgFBSessionInvalidateMessage @"Your session has expired."
在您的 .pch 文件中导入以下文件：
#import "FacebookGlobal.h"
#import "FacebookKey.h"
#import "FacebookMessage.h"
#import "FacebookHelper.h"
现在，您可以使用了。
在您的视图控制器中，添加以下委托：
<FBApiCallDelegate>
在您的视图控制器 .m 文件中，添加以下方法以调用以及委托：
- (void)viewWillAppear:(BOOL)animated {
/*
FacebookHelper *fbHelper = [FacebookHelper sharedInstance];
[fbHelper logoutFromFacebook];
*/
//Get User Info
FacebookHelper *fbHelper = [FacebookHelper sharedInstance];
fbHelper.apiCallDelegate = self;
[fbHelper getUserInfo];
/*
//Get User's Friend List
FacebookHelper *fbHelper = [FacebookHelper sharedInstance];
fbHelper.apiCallDelegate = self;
[fbHelper getUserFriends];
*/
/*
//Post Message to FB Wall
FacebookHelper *fbHelper = [FacebookHelper sharedInstance];
fbHelper.apiCallDelegate = self;
fbHelper.strMessage = g_kPostMessage;
[fbHelper postMessageToWall];
*/
/*
//Post Picture to FB Wall
FacebookHelper *fbHelper = [FacebookHelper sharedInstance];
fbHelper.apiCallDelegate = self;
fbHelper.strMessage = g_kPostMessage;
fbHelper.image = [UIImage imageNamed:@"postPicture.jpg"];
[fbHelper postPictureToWall];
*/
/*
//Share Link on FB Wall
FacebookHelper *fbHelper = [FacebookHelper sharedInstance];
fbHelper.apiCallDelegate = self;
fbHelper.strUrl = g_kPostUrl;
fbHelper.strMessage = g_kPostMessage;
[fbHelper shareLinkOnWall];
*/
/*
//Post All to FB Wall
FacebookHelper *fbHelper = [FacebookHelper sharedInstance];
fbHelper.apiCallDelegate = self;
fbHelper.strMessage = g_kPostMessage;
fbHelper.strUrlTitle = g_kPostUrlTitle;
fbHelper.strUrl = g_kPostUrl;
fbHelper.strCaption = g_kPostCaption;
fbHelper.strPictureUrl = g_kPostPictureUrl;
[fbHelper postAllToWall];
*/
/*
//Post Message to Friend Wall
FacebookHelper *fbHelper = [FacebookHelper sharedInstance];
fbHelper.apiCallDelegate = self;
fbHelper.strMessage = g_kPostMessage;
[fbHelper postMessageToFriendWall];
*/
}
#pragma mark -
#pragma mark Get User Info Delegate
-(void)finishUserInfoResponse:(id)result{
NSLog(@"UserInfo response successed!");
NSLog(@"%@", result);
}
-(void)failedUserInfoResponse:(NSError *)error{
NSLog(@"UserInfo response failed!");
}
#pragma mark -
#pragma mark Get User's Friend List
-(void)finishUserFriendResponse:(id)result{
NSLog(@"User FriendList response successed!");
NSLog(@"%@", result);
}
-(void)failedUserFriendResponse:(NSError *)error{
NSLog(@"User FriendList response failed!");
}
#pragma mark -
#pragma mark Post Message to FB Wall Delegate
-(void)finishPostMessageResponse:(id)result{
NSLog(@"Post message successed!");
NSLog(@"%@", result);
}
-(void)failedPostMessageResponse:(NSError *)error{
NSLog(@"Post message failed!");
}
#pragma mark -
#pragma mark Post Picture to FB Wall
-(void)finishPostPictureResponse:(id)result{
NSLog(@"Post picture successed!");
NSLog(@"%@", result);
}
-(void)failedPostPictureResponse:(NSError *)error{
NSLog(@"Post picture failed!");
}
#pragma mark -
#pragma mark Share Link on FB Wall
-(void)finishShareLinkResponse:(id)result{
NSLog(@"Share link successed!");
NSLog(@"%@", result);
}
-(void)failedShareLinkResponse:(NSError *)error{
NSLog(@"Share link failed!");
}
#pragma mark -
#pragma mark Post All - Message, Link, Caption, PhotoUrl
-(void)finishPostAllResponse:(id)result{
NSLog(@"Post all successed!");
NSLog(@"%@", result);
}
-(void)failedPostAllResponse:(NSError *)error{
NSLog(@"Post all failed!");
}
#pragma mark -
#pragma mark Post Message to Friend Wall Delegate
-(void)finishPostMsgFriendWallResponse:(id)result{
NSLog(@"Post message to friend wall successed!");
NSLog(@"%@", result);
}
-(void)failedPostMsgFriendWallResponse:(NSError *)error{
NSLog(@"Post message to friend wall failed!");
}
快乐编码:)
享受吧。