ios – 在转换期间不隐藏/显示的子视图

我写了一个函数来翻转视图.在动画期间,我想要隐藏一个视图并显示其他视图. @H_675_5@ @H_675_5@这不起作用.但是如果我在转换完成后尝试移动此视图,它会向我显示我所需的结果.

@H_675_5@下面是我写的代码.

@H_675_5@

func tapped() {
    if (showingBACk) {
        UIView.transitionWithView(self.contentView!,duration: 1,options: .TransitionFlipFromRight,animations: {
            self.contentView?.viewWithTag(1)?.hidden = false
            self.contentView?.viewWithTag(2)?.hidden = true
        },completion: { complete in
        })

     } else {


        UIView.transitionWithView(self.contentView!,animations: {
            self.contentView?.viewWithTag(1)?.hidden = true
            self.contentView?.viewWithTag(2)?.hidden = false
        },completion: { complete in
        })
    }

    showingBACk = !showingBACk

}

UIView.animateWithDuration(0.7,delay: 1.0,options: UIViewAnimationCurveEaSEOut,animations: {
                        self.myView.frame = /* set the frame here */
  },completion: { finished in
println("Done!")
  })