根据xcode 7.1中的屏幕方向使用不同的图像

你的问题不是第一个。通过调用[[UIApplication sharedApplication]statusBarOrientation]可以找到方向。您可以更新uiimageview,您想在代码uiimge->中更新该视图;imagenamed方法。它们是在运行时检测方向变化的两种方法,

1.加速计

2.[[UIDevice currentDevice]开始生成设备定向通知];

您可以使用didRotateFromInterfaceOrientation更改图像值: 重写func didRotateFromInterfaceOrientation(fromInterfaceOrorient:UIInterfaceOrrientation){

    switch UIDevice.currentDevice().orientation{
    case .Portrait:
        image_1.image = UIImage(named: "image_1")
    case .PortraitUpsideDown:
        image_1.image = UIImage(named: "image_1")
    case .LandscapeLeft:
        image_1.image = UIImage(named: "image_1_land")
    case .LandscapeRight:
        image_1.image = UIImage(named: "image_1_land")
    default:
        image_1.image = UIImage(named: "image_1")
    } 
}