首先
當然是要加上FB的SDK
然後在.h檔設定如下
#import "FBConnect.h"
@interface AppDelegate : UIResponder <UIApplicationDelegate,FBDialogDelegate, FBSessionDelegate, FBLoginDialogDelegate,FBRequestDelegate>
{
}
// Facebook
@property (nonatomic, retain) Facebook *facebook;
接下來到.m檔
MyAppId是自己在FaceBook申請的應用程式id
-(void)initFacebook
{
// 初始化facebook
facebook = [[Facebook alloc] initWithAppId:MyAppId andDelegate:self];
// 記錄facebook登入的token
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"])
{
facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
}
}
接下來修改AppDelegate的三個函式
-(void)applicationDidBecomeActive:(UIApplication *)application
{
[self extendAccessTokenIfNeeded];
}
-(BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url
{
[self handleOpenURL:url];
return NO;
}
-(BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
[self handleOpenURL:url];
return NO;
}
補上其中呼叫的兩個函式handleOpenURL跟extendAccessTokenIfNeeded
-(void)extendAccessTokenIfNeeded
{
[[self facebook] extendAccessTokenIfNeeded];
}
-(BOOL)handleOpenURL:(NSURL *)url
{
return [self.facebook handleOpenURL:url];
}
取得授權跟login
-(void)loginFacebook
{
if(![facebook isSessionValid])
{
//取得相關授權
NSArray *permissions = [[NSArray alloc] initWithObjects:
@"user_likes",
@"read_stream",
@"user_birthday",
@"publish_stream",
@"offline_access",
@"user_status",
nil];
[self.facebook authorize:permissions];
}
else
{
[self fbDidLogin];
}
}
login跟logout的內容
- (void)fbDidLogin
{
NSLog(@"fbDidLogin");
[self storeAuthData:[[self facebook] accessToken] expiresAt:[[self facebook] expirationDate]];
}
- (void)fbDidLogout
{
NSLog(@"fbDidLogout");
// 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:@"FBAccessTokenKey"];
[defaults removeObjectForKey:@"FBExpirationDateKey"];
[defaults synchronize];
}
接下來重頭戲來了,將文章跟照片post上FB
-(void)postFacebook
{
NSLog(@"fbDidLogin");
[self storeAuthData:[[self facebook] accessToken] expiresAt:[[self facebook] expirationDate]];
currentAPICall = kAPIGraphUserPost;
NSString *sMessage = [[NSString alloc] initWithString:[NSString stringWithFormat:@"3我要潑的訊息"]];
NSMutableDictionary * params2 = [NSMutableDictionary dictionaryWithObjectsAndKeys:
g_FBPostImage, @"picture",sMessage,@"message",
nil];
[facebook requestWithGraphPath:@"me/photos"
andParams:params2
andHttpMethod:@"POST"
andDelegate:self];
}
如果不要潑圖片,只要潑訊息,可以將me/photos改成me/feed,然後g_FBPostImage, @"picture",這段拿掉即可
最後補上一些FB預設的函式,用以捕捉訊息
- (void)apiFQLIMe
{
// Using the "pic" picture since this currently has a maximum width of 100 pixels
// and since the minimum profile picture size is 180 pixels wide we should be able
// to get a 100 pixel wide version of the profile picture
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
@"SELECT uid, name, pic FROM user WHERE uid=me()", @"query",
nil];
[[self facebook] requestWithMethodName:@"fql.query"
andParams:params
andHttpMethod:@"POST"
andDelegate:self];
}
- (NSDictionary *)parseURLParams:(NSString *)query {
NSArray *pairs = [query componentsSeparatedByString:@"&"];
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
for (NSString *pair in pairs) {
NSArray *kv = [pair componentsSeparatedByString:@"="];
NSString *val =
[[kv objectAtIndex:1]
stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
[params setObject:val forKey:[kv objectAtIndex:0]];
}
return params;
}
- (void)storeAuthData:(NSString *)accessToken expiresAt:(NSDate *)expiresAt {
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:accessToken forKey:@"FBAccessTokenKey"];
[defaults setObject:expiresAt forKey:@"FBExpirationDateKey"];
[defaults synchronize];
}
- (void)fbSessionInvalidated
{
NSLog(@"fbSessionInvalidated");
UIAlertView *alertView = [[UIAlertView alloc]
initWithTitle:@"Auth Exception"
message:@"Your session has expired."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil,
nil];
[alertView show];
[self fbDidLogout];
}
#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");
}
- (void)request:(FBRequest *)request didLoad:(id)result
{
NSLog(@"request:didLoad");
haveFbRequest = false;
if ([result isKindOfClass:[NSArray class]] && ([result count] > 0))
{
result = [result objectAtIndex:0];
}
UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:@"成功分享到facebook了!" message:nil delegate:self cancelButtonTitle:@"確定" otherButtonTitles:nil, nil];
[alertView show];
}
- (void)request:(FBRequest *)request didFailWithError:(NSError *)error
{
NSLog(@"request fail");
NSLog(@"Error message: %@", [[error userInfo] objectForKey:@"error_msg"]);
}
#pragma mark - FBDialogDelegate Methods
/**
* Called when a UIServer Dialog successfully return. Using this callback
* instead of dialogDidComplete: to properly handle successful shares/sends
* that return ID data back.
*/
- (void)dialogCompleteWithUrl:(NSURL *)url
{
NSLog(@"dialogCompleteWithUrl.");
if (![url query])
{
NSLog(@"User canceled dialog or there was an error");
return;
}
}
