如何呈现半屏模态视图？
我有一个 UIViewController，当按下按钮时，我想要一个半屏视图向上滑动，其中有一个 UIPicker。
我在 IB 中使用 UIPicker 和带有“完成/取消”按钮的 UIToolBar 制作了一个 UIView。
我怎样才能做到这一点，只有这个半视图向上滑动，背景视图仍然显示，但变暗或无法播放。
到目前为止我正在使用这段代码：
- (void)showModalView
{
[self.popupView setFrame:CGRectMake(0, self.view.frame.size.height, self.view.frame.size.width, self.view.frame.size.height)];
[self.view addSubview:self.popupView];
[UIView animateWithDuration:.2 animations:^{
[self.popupView setFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
}];
}
这是一张图片： http://www.box .net/shared/static/08ji4s0f6i1b8qubrtz6.png
I have a UIViewController and when a button is pressed, I want a half screen view to slide up with a UIPicker in it.
I made a UIView in IB with the UIPicker along with a UIToolBar with Done/Cancel buttons.
How can I make it so that just this half view slides up and the background view is still showing but dimmed or cant be played with.
I'm using this code so far:
- (void)showModalView
{
[self.popupView setFrame:CGRectMake(0, self.view.frame.size.height, self.view.frame.size.width, self.view.frame.size.height)];
[self.view addSubview:self.popupView];
[UIView animateWithDuration:.2 animations:^{
[self.popupView setFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
}];
}
Here is a pic: http://www.box.net/shared/static/08ji4s0f6i1b8qubrtz6.png
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评论（2）
@Jon：
METHOD-1：
通过将其 alpha 值设置为 0 并将子视图添加到仅占主屏幕一半的主视图并保持其不透明（alpha 值为1) 与默认情况一样。
然后简单地使用当前的模态视图控制器来呈现视图控制器。
请记住，由于透明，您将能够看到前一个视图的一半，但无法触摸它，因为存在透明视图。
方法-2：
另一种解决方法是对大小为现有视图一半的 UIView 进行动画处理。
然后你必须简单地遵循 UIView 的动画。
这里，由于它只是一个 UIView，将作为子视图添加到现有视图中，因此您将能够触摸屏幕的其余部分。
因此，您可以根据您的要求采用其中一种方法。
希望这对您有帮助。
@Jon:
METHOD-1:
Make your main view transperant by setting its alpha value to 0 and add a subview to the main view which is only half of the main screen and keep it opaque (alpha value as 1) as it would be by default.
Then simply present the view controller using present Modal View Controller.
Keep in mind that because of the transperancy you would be able to see half of the previous view, but wont be able to touch it as there is a transperant view.
METHOD-2:
Another work around is to animate a UIView which is of size half of the existing view.
Then you have to simply follow animation of the UIView.
Here as it is just a UIView that will be added as subview to existing view, you will be able to touch the rest of the screen.
So you can follow either of the methods as per your requirement.
Hope this helps you.
这是您需要的 github
TDSemiModalView上的开源代码，具有半视图日期选择器。检查代码中的演示项目。这是链接..希望它能解决您的问题。TDSemiModalClass
Here is what u need its an open source code on github
TDSemiModalViewhaving a half view date picker. Check the demo project inside the code. Here is the link.. Hope it solves your problem.TDSemiModalClass