为什么我要延迟加载 NSBundle 移动核心服务.框架？

Question

当我从主viewController重定向到另一个viewController时，我得到了这个。

错误：

Lazy 加载 NSBundle MobileCoreServices.framework，

已加载MobileCoreServices.framework，

system group . com . apple . configuration profiles的系统组容器路径为/Users/develop/Library/Developer/core simulator/Devices/083 c 0102-C85F-463 a-96 F4-ca 1b 9 AC 7919d/data/Containers/Shared/system group/system group . com . apple . configuration profiles

我的代码是...

Appdelegate.m

if (![[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"]) {
    [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasLaunchedOnce"];
    [[NSUserDefaults standardUserDefaults] synchronize];
    NSLog(@"Launched first time");
} else {
    NSLog(@"Already launched");
    [self getData];
}

查看下载

if ([[NSUserDefaults standardUserDefaults] boolForKey:@"HasLaunchedOnce"]) {

    dispatch_async(dispatch_get_main_queue(), ^{
        LoginPageViewController *lpvc = [self.storyboard instantiateViewControllerWithIdentifier:@"LPVC"];
        [self.navigationController pushViewController:lpvc animated:NO];
    });
} else {
    // My code...
}

Answer 1

更新应用委托中的代码。

if (![[NSUserDefaults standardUserDefaults] boolForKey:"HasLaunchedOnce"]){
       LoginPageViewController *lpvc = [self.storyboard instantiateViewControllerWithIdentifier:@"LPVC"];
       self.window.rootViewController = lpvc;
       NSLog(@"Launched first time");
      [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"HasLaunchedOnce"];
      [[NSUserDefaults standardUserDefaults] synchronize];

}else {
      MainViewController *mainVC = [self.storyboard instantiateViewControllerWithIdentifier:@"MainVC"];
      self.window.rootViewController = mainVC;
     NSLog(@"Already launched");
     [self getData];
}

Answer 2

您收到的消息来自 Xcode 9。Xcode 8 中的等效消息是：

[MC] 系统组的系统组容器.com.apple.配置配置文件路径为 /用户/开发/库/开发人员/核心仿真器/设备/083C0102-C85F-463A-96F4-CA1B9AC7919D/数据/容器/共享/系统组/系统组.com.apple.configurationprofiles

请注意[MC]：这是一条系统消息。可以安全地忽略此消息。

要隐藏此类消息，请遵循以下解决方案https://stackoverflow.com/a/42140442/1033581:

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