在iOS 5中，使用“情节串连板”（storyboard）从屏幕底部飞入的按钮设置自定义子视图的动画

我正在尝试模拟键盘显示动画，只使用一个自定义子视图来显示用户的三个按钮。是否有任何方法可以通过脚本实现这一点（即不必以编程方式创建子视图）？

快速回答 是的，不过您必须以编程方式设置一些子视图属性。您要做的是让UIViewController调用：

[UIView animateWithDuration:animations:completion:]

---

详细示例 在使用键盘的任何方法的一侧，请尝试以下操作：

CGFloat windowWidth = self.mainView.frame.size.width;
CGFloat windowHeight = self.mainView.frame.size.height;

// center myCustomSubview along the x direction, and put myCustomSubview just below the screen when UIViewController initially gets onto the screen
CGPoint offScreenBelow = CGPointMake(windowWidth/2, windowHeight + (myCustomView.frame.size.y/2));
CGPoint onScreen = CGPointMake(windowWidth/2,windowHeight/2); 
// change the second argument of the CGPointMake function to alter the final height of myCustomSubview

// start myCustomSubview offscreen
myCustomSubview.center = offScreenBelow;
// make sure to add myCustomSubview to the UIViewController's view's subviews
[self.view addSubview:myCustomSubview];
float duration = 1.0; // change this value to make your animation slower or faster. (units in seconds)

// animate myCustomSubview onto the screen
[UIView animateWithDuration:duration
                 animations:^{
                     myCustomSubview.center = onScreen;
                 }
                 completion:^(BOOL finished){
                     // add anything you want to be done as soon as the animation is finished here
                 }];

确保在“ViewDidDisplay:”之后或其内部调用您的方法。 当您想让myCustomSubview动画返回屏幕外时，请确保在UIViewController中执行以下操作：

// set offscreen position same way as above
CGFloat windowWidth = self.mainView.frame.size.width;
CGFloat windowHeight = self.mainView.frame.size.height;

CGPoint offScreenBelow = CGPointMake(windowWidth/2, windowHeight + (myCustomView.frame.size.y/2));

// myCustomSubview is on screen already. time to animate it off screen
[UIView animateWithDuration:duration // remember you can change this for animation speed
                 animations:^{
                     myCustomSubview.center = offScreenBelow;
                 }
                 completion:^(BOOL finished){
                     [myCustomSubview removeFromSuperView];
                 }];

---

如果您的子视图未显示 与处理子视图时一样，请确保帧设置正确，子视图已添加到带有

addSubview:

的superview，子视图不为零（并且已正确初始化），并且子视图的alpha和不透明属性均未设置为0。

快速回答 是的，不过您必须以编程方式设置一些子视图属性。您要做的是让UIViewController调用：

[UIView animateWithDuration:animations:completion:]

---

详细示例 在使用键盘的任何方法的一侧，请尝试以下操作：

CGFloat windowWidth = self.mainView.frame.size.width;
CGFloat windowHeight = self.mainView.frame.size.height;

// center myCustomSubview along the x direction, and put myCustomSubview just below the screen when UIViewController initially gets onto the screen
CGPoint offScreenBelow = CGPointMake(windowWidth/2, windowHeight + (myCustomView.frame.size.y/2));
CGPoint onScreen = CGPointMake(windowWidth/2,windowHeight/2); 
// change the second argument of the CGPointMake function to alter the final height of myCustomSubview

// start myCustomSubview offscreen
myCustomSubview.center = offScreenBelow;
// make sure to add myCustomSubview to the UIViewController's view's subviews
[self.view addSubview:myCustomSubview];
float duration = 1.0; // change this value to make your animation slower or faster. (units in seconds)

// animate myCustomSubview onto the screen
[UIView animateWithDuration:duration
                 animations:^{
                     myCustomSubview.center = onScreen;
                 }
                 completion:^(BOOL finished){
                     // add anything you want to be done as soon as the animation is finished here
                 }];

确保在“ViewDidDisplay:”之后或其内部调用您的方法。 当您想让myCustomSubview动画返回屏幕外时，请确保在UIViewController中执行以下操作：

// set offscreen position same way as above
CGFloat windowWidth = self.mainView.frame.size.width;
CGFloat windowHeight = self.mainView.frame.size.height;

CGPoint offScreenBelow = CGPointMake(windowWidth/2, windowHeight + (myCustomView.frame.size.y/2));

// myCustomSubview is on screen already. time to animate it off screen
[UIView animateWithDuration:duration // remember you can change this for animation speed
                 animations:^{
                     myCustomSubview.center = offScreenBelow;
                 }
                 completion:^(BOOL finished){
                     [myCustomSubview removeFromSuperView];
                 }];

---

如果您的子视图未显示

---

与处理子视图时一样，请确保帧设置正确，子视图已添加到带有

addSubview:

的superview，子视图不为零（并且已正确初始化），并且子视图的alpha和不透明属性均未设置为0。

这可能会起作用，但我在找一张单子。谢谢佩德罗！这可能行得通，但我在找一张UIAlertSheet。谢谢佩德罗！