Judgment iOS development of horizontal and vertical screen

Analyzing horizontal screen
 IF ([the UIApplication sharedApplication] == .statusBarOrientation UIDeviceOrientationLandscapeRight || 
[the UIApplication sharedApplication] == .statusBarOrientation UIDeviceOrientationLandscapeLeft) {
     // this landscape 
} the else {
    // this portrait 
}

Analyzing vertical screen
 IF ([the UIApplication sharedApplication] == .statusBarOrientation UIDeviceOrientationPortrait ||  
[the UIApplication sharedApplication] .statusBarOrientation == UIDeviceOrientationPortraitUpsideDown) {
     // this portrait 
} the else {
    // this landscape 
}