只是为了测试它,我启用了状态栏的活动指示器,如下所示:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible: TRUE];
//...
}
我从不禁用指示器,因此它应该始终可见,但事实并非如此。它在 iPhone 模拟器中可见,但在设备上不可见。为什么?