Question

我创建了一个自定义日期选择器。我想从下到上显示它。但它没有显示它从上到下显示。

这是代码。

let frame:CGRect = CGRect(x: 0, y: 600, width: self.view.frame.width, height: self.view.frame.height/3)
        self.datePicker = CustomDatePicker.instanceFromNib(frame: frame) as? CustomDatePicker
        self.datePicker?.configureDatePicker()
        datePicker?.customPickerDelegate = self
        UIView.animate(withDuration: 1.5, animations: {

            DILog.print(items: "Updated Y is \(self.view.frame.height - self.view.frame.height/3)")
            let frame:CGRect = CGRect(x: 0, y: 300, width: self.view.frame.width, height: self.view.frame.height/3)
            self.datePicker = CustomDatePicker.instanceFromNib(frame: frame) as? CustomDatePicker

        }, completion: { (value) in

        })
        self.view.addSubview(self.datePicker!)

Answer 1

首先必须在动画之前添加动画选择器，其次你不能在动画内再次从笔尖加载选择器

this.state = {
          region: {
            latitude: LATITUDE,
            longitude: LONGITUDE,
            latitudeDelta: LATITUDE_DELTA,
            longitudeDelta: LONGITUDE_DELTA,
          },
<MapView
      provider={ PROVIDER_GOOGLE }
      style={ styles.map }
      initialRegion={this.state.region}
      onPress={this.onMapPress}
      minZoomLevel={10}  //to zoom map to my location
      />

Answer 2

首先：在动画制作之前，在父视图中添加datePicker。除非你这样做，否则它不可见秒：您的选择器y在动画块中不是动态的。它应该是原始y - 选择器的高度。

总代码：

let frame:CGRect = CGRect(x: 0, y: 600, width: self.view.frame.width, height: self.view.frame.height/3)
self.datePicker = CustomDatePicker.instanceFromNib(frame: frame) as? CustomDatePicker
self.datePicker?.configureDatePicker()
datePicker?.customPickerDelegate = self
self.view.addSubview(self.datePicker!)
UIView.animate(withDuration: 1.5, animations: {

    DILog.print(items: "Updated Y is \(self.view.frame.height -        self.view.frame.height/3)")
    let frame:CGRect = CGRect(x: 0, y: 600 - self.view.frame.height/3, width: self.view.frame.width, height: self.view.frame.height/3)
    self.datePicker = CustomDatePicker.instanceFromNib(frame: frame) as? CustomDatePicker

        }, completion: { (value) in

        })

Answer 3

使用一些很酷的动画，您可以执行以下操作...

 //configure date picker and add it

//animate it in this way
    UIView.animate(withDuration: 1.5, delay: 0, usingSpringWithDamping: 0.5, initialSpringVelocity: 1, options: .curveEaseIn, animations: {

        self.datePicker.frame = CGRect(x: 0, y: 300, width: self.view.frame.width, height: self.view.frame.height/3)

    }) { (isDone) in

    }

无法从上到下显示日期选择器？

3 个答案: