我想创建一个登录按钮。当我点击它启动facebook时,我接受我的应用程序,Facebook应用程序关闭,我的应用程序重新加载。我的问题是我的应用程序第二次启动,在Facebook上接受后,我找不到禁用登录按钮的位置。
我写了这段代码:
-(IBAction) login:(id)sender;
{
AutoAppDelegate *delegate = (AutoAppDelegate *) [[UIApplication sharedApplication] delegate];
// Check and retrieve authorization information
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"FBAccessTokenKey"]
&& [defaults objectForKey:@"FBExpirationDateKey"]) {
[delegate facebook].accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
[delegate facebook].expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
}
if (![[delegate facebook] isSessionValid]) {
[delegate facebook].sessionDelegate = self;
NSArray *permissions = [[NSArray alloc] initWithObjects:
@"user_likes",
@"read_stream",
nil];
[[delegate facebook] authorize:permissions];
} else {
logIn.hidden=YES;
lbl.text=@"";
lbl.text=@"Connected";
[self showLoggedIn];
}
}
- (void) showLoggedIn {
NSLog(@"11 Logged In ");
lbl.text=@"";
lbl.text=@"Connected";
}
- (void) showLoggedOut {
NSLog(@"11 Not Logged In ");
lbl.text=@"";
lbl.text=@"Not Connected";
}
- (void) viewWillAppear:(BOOL)animated
{
//[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
AutoAppDelegate *delegate = (AutoAppDelegate *) [[UIApplication sharedApplication] delegate];
// Check and retrieve authorization information
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if ([defaults objectForKey:@"FBAccessTokenKey"]
&& [defaults objectForKey:@"FBExpirationDateKey"]) {
[delegate facebook].accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
[delegate facebook].expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
}
if (![[delegate facebook] isSessionValid]) {
// [self showLoggedOut];
NSLog(@"Not Connected");
} else {
// [self showLoggedIn];
NSLog(@"Connected");
}
}
viewWillAppear
第一次运行,但是当我在Facebook应用程序中授予权限时,我的应用程序重新启动,但不是viewWillAppear
方法!
答案 0 :(得分:0)
在Facebook事情完成后,您是否尝试在视图上调用setNeedsDisplay?
答案 1 :(得分:0)
您需要将代码放在应用程序委托(applicationWillEnterForeground
)中,因为这是在重新打开应用程序时自动获得通知的唯一方法(您的视图不一定会被重新绘制)。