IOS8 to set the status bar to hide in

1. Add key to Info.plist: "Status bar is initially hidden", set to Yes to hide the status bar from the Launchscreen interface displayed when the app is launched, not display.
2. Add key to Info.plist: "View controller-based status bar Appearance" is set to Yes to display the status bar while the app is running, not display it. If you want to set the status bar display or hide under different VC can be implemented by the following code:

This line of code only works in the second step of the operation
[[UIApplication sharedapplication] setstatusbarhidden:no];

IOS8 to set the status bar to hide in