settings crash when click my app
NSUserDefaults  *defaults=[NSUserDefaults standardUserDefaults];

NSString  *serverURL;
BOOL       useSSL;
BOOL       needAuth;

if (defaults!=nil) {
    serverURL=[defaults stringForKey:@"serverUrl"];
    useSSL=[defaults boolForKey:@"useSSL"];
    needAuth=[defaults boolForKey:@"needAuth"];
}

NSLog(@"serverURL:%@ class:%@",serverURL,[serverURL class]);
NSLog(@"useSSL:%d",useSSL);
NSLog(@"needAuth:%d",needAuth);
if ( defaults == nil || serverURL == nil) {
    [self registerDefaultsFromSettingsBundle];
    serverURL=[defaults stringForKey:@"serverUrl"];
}

NSLog(@"url:%@ class:%@",serverURL,[serverURL class]);

- (void)viewWillAppear:(BOOL)animated
 {
  [super viewWillAppear:animated];
   NSUserDefaults  *defaults=[NSUserDefaults standardUserDefaults];

  NSString  *serverURL;
  BOOL       useSSL;
  BOOL       needAuth;

  if (defaults!=nil) {
    serverURL=(NSString*) [defaults stringForKey:@"serverUrl"];
    useSSL=[defaults boolForKey:@"useSSL"];
    needAuth=[defaults boolForKey:@"needAuth"];
  }
    NSLog(@"serverURL:%@ class:%@",serverURL,[serverURL class]);
    if (serverURL==nil) {
        serverURL=@"ioa.bingosoft.net/test";
    }

    NSLog(@"useSSL:%d",useSSL);
    NSLog(@"needAuth:%d",needAuth);
    self.itemsDictionary =[[NSMutableDictionary alloc]initWithCapacity:3];

    self.keys=[[NSArray alloc]initWithObjects:@"服务器地址",@"是否安全登录",@"验证服务器端证书",@"清空缓存", nil];

    [self.itemsDictionary setObject:serverURL forKey:@"服务器地址"];
    [self.itemsDictionary setObject:[NSNumber numberWithBool:useSSL] forKey:@"是否安全登录"];
    [self.itemsDictionary setObject:[NSNumber numberWithBool:needAuth] forKey:@"验证服务器端证书"];

    NSLog(@"itemDictionary %@",itemsDictionary);
}