新浪微博

    //保存认证的数据到本地

- (void)sinaweiboDidLogIn:(SinaWeibo *)sinaweibo {
    NSDictionary *authData = [NSDictionary dictionaryWithObjectsAndKeys:
                              sinaweibo.accessToken, @"AccessTokenKey",
                              sinaweibo.expirationDate, @"ExpirationDateKey",
                              sinaweibo.userID, @"UserIDKey",
                              sinaweibo.refreshToken, @"refresh_token", nil];
    [[NSUserDefaults standardUserDefaults] setObject:authData forKey:@"SinaWeiboAuthData"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

//初始化微博对象
- (void)_initSinaWeibo {
    _sinaweibo = [[SinaWeibo alloc] initWithAppKey:kAppKey appSecret:kAppSecret appRedirectURI:kAppRedirectURI andDelegate:_mainCtrl];
    
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    NSDictionary *sinaweiboInfo = [defaults objectForKey:@"SinaWeiboAuthData"];
    if ([sinaweiboInfo objectForKey:@"AccessTokenKey"] && [sinaweiboInfo objectForKey:@"ExpirationDateKey"] && [sinaweiboInfo objectForKey:@"UserIDKey"])
    {
        _sinaweibo.accessToken = [sinaweiboInfo objectForKey:@"AccessTokenKey"];
        _sinaweibo.expirationDate = [sinaweiboInfo objectForKey:@"ExpirationDateKey"];
        _sinaweibo.userID = [sinaweiboInfo objectForKey:@"UserIDKey"];
    }
}

//设置导航栏上的标题
- (void)setTitle:(NSString *)title {
    [super setTitle:title];
    
    UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectZero];
    titleLabel.textColor = [UIColor blackColor];
    titleLabel.font = [UIFont boldSystemFontOfSize:18.0f];
    titleLabel.backgroundColor = [UIColor clearColor];
    titleLabel.text = title;
    [titleLabel sizeToFit];
    
    self.navigationItem.titleView = [titleLabel autorelease];
}

//去除微博对象
- (SinaWeibo *)sinaweibo {
    AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    SinaWeibo *sinaweibo = appDelegate.sinaweibo;
    return sinaweibo;
}