Swift:如何在模式设置为仅时间的情况下调整日期选择器的宽度 [英] Swift: How to adjust width of Date Picker with mode set to Time Only

问题描述

日期选择器组件右侧似乎有一些浪费的空间:

There seems to be some wasted space towards the right of the date picker component:

并且我是否增加或减少其框架的宽度/高度值都没有关系；它保持标准尺寸.

And it doesn't matter if I increase or decrease the value of width/height of its frame; it stays the standard size.

    let datePicker = UIDatePicker(frame: CGRect(x: 20, y: 100, width: 500, height: 200))
    datePicker.datePickerMode = .date
    view.addSubview(datePicker)
    

我的问题是，可以调整吗?

My question is, can it be adjusted?

所以我设法找到了它的简短形式，但只能通过故事板添加.

edit: So I managed to find its short form but thats only addable through the storyboard.

视图如下:

顶部的第一个选择器以编程方式添加，第二个选择器通过故事板添加.出于某种原因，我无法使以编程方式创建的选择器变小...

The top first picker is added programmatically and the second via storyboard. For some reason, I'm unable to make the programmatically created picker smaller...

推荐答案

你可以问问日期选择器哪个尺寸足够了 ;)

You can just ask the date picker which size is sufficient ;)

选项 A

let datePicker = UIDatePicker()
datePicker.datePickerMode = .date

// Let it size itself to its preferred size
datePicker.sizeToFit()
// Set the frame without changing the size
datePicker.frame = .init(x: 20, y: 100, width: datePicker.bounds.size.width, height: datePicker.bounds.size.height)

view.addSubview(datePicker)

选项 B

let datePicker = UIDatePicker()
datePicker.datePickerMode = .date

// Ask the picker for its preferred size
let datePickerPreferredSize = datePicker.systemLayoutSizeFitting(view.bounds.size)
// Set the frame using that size
datePicker.frame = .init(x: 20, y: 100, width: datePickerPreferredSize.width, height: datePickerPreferredSize.height)

view.addSubview(datePicker)

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