僅在ios中旋轉視圖

Question

我的應用程序僅在縱向模式下受支持。 我要求僅根據設備方向旋轉特定的UIView 。

你能幫我么？

Answer 1

在您的viewdidload或init中添加以下代碼

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

[[NSNotificationCenter defaultCenter] addObserver: self selector:   @selector(deviceOrientationDidChange:) name: UIDeviceOrientationDidChangeNotification object: nil];

在deviceOrientationDidChange函數中，您將獲得設備方向，據此您可以更新視圖

- (void)deviceOrientationDidChange:(NSNotification *)notification {
     //Obtain current device orientation
     UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];

      //Do my thing
 }

Answer 2

if (interfaceOrientation == UIInterfaceOrientationPortrait) {
    // set your view frame work for portrait mode

}
else {
// set new frame of view for landscape mode.
}

希望你能明白。 謝謝

Answer 3

經過長時間的嘗試，我使用CGAffineTransform找到了答案。

- (void)deviceOrientationDidChange:(NSNotification *)notification {
    //Obtain current device orientation
    UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];

    CGFloat angle;
    switch (orientation) {
        case UIDeviceOrientationPortraitUpsideDown:
            angle = M_PI;
            break;
        case UIDeviceOrientationLandscapeRight:
            angle = - M_PI_2;
            break;
        case UIDeviceOrientationLandscapeLeft:
            angle = M_PI_2;
            break;
        case UIDeviceOrientationPortrait:
        default:
            angle = 0.f;
            break;
    }
    animationView.transform= CGAffineTransformMakeRotation(angle);
    animationView.frame = self.view.frame;
}