小编May*_*iya的帖子

我想将我当前的项目从iOS 6转换为iOS 7.在iOS 6中我的项目工作正常,但在iOS 7中导航栏图像显示不正常.

我在iOS 6中使用了这段代码片段,

UIImage *imgNav = [UIImage imageNamed:@"navigation.png"];
self.navigationController.navigationBar.frame = CGRectMake(0, 0, 320, 44);
[self.navigationController.navigationBar setBackgroundImage:imgNav forBarMetrics:
     UIBarMetricsDefault];

如何在iOS 7中设置导航栏图像？

我想获得所有新增加的联系人标识符.

这是我的代码:

-(void)viewWillAppear:(BOOL)animated {

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(addressBookDidChange:) name:CNContactStoreDidChangeNotification object:nil];
}

-(void)addressBookDidChange:(NSNotification*)notification
{
    //Handle event here...
    NSDictionary *dict = notification.userInfo;
    NSLog(@"Notification - %@",dict);

}

CNNotificationSaveIdentifiersKey数组始终为空.

 Notification - {
    CNNotificationOriginationExternally = 1;
    CNNotificationSaveIdentifiersKey =     (
    );
    CNNotificationSourcesKey =     (
    );
}