ios - 方法已弃用 authenticateWithCompletionHandler

Question

我知道，有一些关于这方面的线索，但我并没有真正明白我必须为我的类(class)做些什么。

- (void)authenticateLocalUser {

if (!gameCenterAvailable) return;

NSLog(@"Authenticating local user...");
if ([GKLocalPlayer localPlayer].authenticated == NO) {
    [[GKLocalPlayer localPlayer]
     authenticateWithCompletionHandler:nil];
} else {
    NSLog(@"Already authenticated!");
}
}

我该如何解决这个问题，它说“authenticateWithCompletionHandler”已被弃用。

有人可以帮帮我吗？

编辑:

使用新代码

- (void)authenticateLocalUser {

if (!gameCenterAvailable) return;

NSLog(@"Authenticating local user...");

if ([GKLocalPlayer localPlayer].authenticated == NO) {

    GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];
    [localPlayer setAuthenticateHandler:(^(UIViewController* viewcontroller, NSError *error) {
        //[localPlayer authenticateWithCompletionHandler:^(NSError *error) { OLD CODE!
        if(localPlayer.isAuthenticated) {
            //do some stuff
        }else {
            // not logged in
        }
    })];
} else {
    NSLog(@"Already authenticated!");
}   
}

错误是:在此 block 中强烈捕获“localPlayer”很可能会导致保留循环。它在 if(localPlayer.isAuthenticated) 中。

此外，游戏中心不再弹出。如果我想让它用这段代码再次弹出:

localPlayer.authenticateHandler = ^(UIViewController *viewController,NSError *error) {
if (localPlayer.authenticated) { 
//already authenticated
} else if(viewController) {
[self presentViewController:viewController];//present the login form
} else {
//problem with authentication,probably bc the user doesn't use Game    Center
} 
};

同样的错误。

这里是 img:

Answer 1

你用这个方法替换了这个方法:

-(void)authenticateLocalUser {


NSLog(@"Authenticating local user ...");
if(!gameCenterAvailable) {
    return;
}

    GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];
    localPlayer.authenticateHandler = ^(UIViewController *viewController, NSError *error){
    NSLog(@"authenticateHandler");
    if (viewController != nil)
    {
        NSLog(@"viewController != nil");
    }
    else if (localPlayer.isAuthenticated)
    {
        NSLog(@"localPlayer already authenticated");
        //do some stuff
    }
    else
    {
        NSLog(@"local player not authenticated");
        // not logged in
    }
   };
}