我在我的AppDelegate中定义了两个过程:saveSettings和loadSettings。我在AppDidFinishLaunching方法中调用我的loadSettings过程,在设置视图中点击保存按钮后调用saveSettings过程。
这两种方法似乎都是在正确的时间、正确的次数(一次)和使用正确的数据进行调用的。我的设置对象获取了正确的数据,但数据似乎并没有真正保存。当我运行加载代码时,返回的变量为空(不是nil)。
我尝试将相同的加载代码放在另一个视图中,它可以正常工作,但由于某些原因,我在appDelegate中无法获得结果。
- (void)applicationDidFinishLaunching:(UIApplication *)application {
[window addSubview:navigationController.view];
[window makeKeyAndVisible];
[self loadSettings];
[self setDefaults];
}
-(void)loadSettings{
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
settings.masterLocation = [prefs objectForKey:@"masterLocation"];
settings.masterPort = [prefs objectForKey:@"masterPort"];
settings.userName = [prefs objectForKey:@"userName"];
settings.passWord = [prefs objectForKey:@"passWord"];
settings.autoLogin=[prefs objectForKey:@"autoLogin"];
if (settings.autoLogin == nil)
settings.autoLogin=@"N";
}
-(void)saveSettings:(SharedData *)d{
settings=d;
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setObject:settings.masterLocation forKey:@"masterLocation"];
[prefs setObject:settings.masterPort forKey:@"masterPort"];
[prefs setObject:settings.userName forKey:@"userName"];
[prefs setObject:settings.passWord forKey:@"passWord"];
[prefs setObject:settings.autoLogin forKey:@"autoLogin"];
}