如何在视图中调整FBLoginView的位置？

Question

我以图形方式添加了facebook登录按钮，但是当用户使用不同的语言时，我发现它的高度可变。

这就是它的样子：

我希望能够将facebook登录视图与其他视图之间的距离设置为始终相同，但问题是当您使用英语时，facebook按钮本身的高度小于60（我的情况），但它在其他语言中更大。怎么实现呢？是否可以让按钮本身始终位于视图的底部？或者通过自动布局？不知何故？谢谢你的帮助。

这就是ios模拟器中的样子：

Answer 1

如果您想坚持使用自己的设计，请使用自定义按钮进行Facebook登录，并在点击按钮时调用以下代码。

@property (strong, nonatomic) IBOutlet  UIButton *LoginLogout;

FBSession session;
NSDictionary *permissions;

- (void)updateView {
    // get the app delegate, so that we can reference the session property

    if (self.session.isOpen) {
        // valid account UI is shown whenever the session is open

        [self.LoginLogout setText:@"Log out" ];


    } 
     else {
        // login-needed account UI is shown whenever the session is closed
        [self.LoginLogout setText:@"Login with Facebook" ];

    }
}
// handler for button click, logs sessions in or out
- (IBAction)buttonClickHandler:(id)sender {
    // get the app delegate so that we can access the session property

    // this button's job is to flip-flop the session from open to closed
    if (self.session.isOpen) {
        // if a user logs out explicitly, we delete any cached token information, and next
        // time they run the applicaiton they will be presented with log in UX again; most
        // users will simply close the app or switch away, without logging out; this will
        // cause the implicit cached-token login to occur on next launch of the application
        [self.session closeAndClearTokenInformation];


    } else {
       if (self.session.state != FBSessionStateCreated) {
            // Create a new, logged out session.
          self.session = [[FBSession alloc] init];
        }

        // if the session isn't open, let's open it now and present the login UX to the user
        [[self.session  initWithPermissions:self.permissions]openWithCompletionHandler:^(FBSession *session,
                                                                                                        FBSessionState status,
                                                                                                        NSError *error) {
            // recurse here, in order to update buttons and labels

            [self updateView];
        }];


    }
}

应在Appdelegate中处理登录响应。所以在Appdelegate.m中包含以下函数

- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation {



    // Call FBAppCall's handleOpenURL:sourceApplication to handle Facebook app responses
    BOOL wasHandled =NO;


    wasHandled=[FBAppCall handleOpenURL:url sourceApplication:sourceApplication withSession:self.session];


    return wasHandled;

}