iOS 下拉视图
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iOS drop down view
提问by IssacZH.
I have been searching for drop down view (expand & collapse view) that basically expand when user clicked on it or collapse.
我一直在寻找下拉视图（展开和折叠视图），当用户点击它或折叠时，它基本上会展开。
The drop down is basically use to include textview/textfield. Till now I could not manage to find how to create this drop down view. What I managed to find is drop down menu which is sort of like an option picker that allows you to select an option. I just wanted to include text only. Is it possible to ask for some pointers regarding this?
下拉菜单主要用于包含 textview/textfield。直到现在我无法找到如何创建这个下拉视图。我设法找到的是下拉菜单，它有点像一个选项选择器，允许您选择一个选项。我只想包含文本。是否有可能就此提出一些建议？
Thanks.
谢谢。
回答by Darkseal
I also needed a HTML select-like control (single-selection dropdown list) without breaking the XCode legacy GUI interface across past and future iOS releases.
我还需要一个类似 HTML 选择的控件（单选下拉列表），而不会破坏过去和未来 iOS 版本的 XCode 遗留 GUI 界面。
I ended up coding DownPicker, a lightweight control which does just that combining UITextFieldand UIPickerView. It can be used either as custom control (UIDownPicker) or also as control wrapper, upgrading any existing UITextField.
我最终编写了 DownPicker，这是一个轻量级控件，它可以将UITextField和UIPickerView. 它既可以用作自定义控件 ( UIDownPicker)，也可以用作控件包装器，升级任何现有的UITextField.
Here's how it looks like:
这是它的样子：
For more info and download you can check this brief tutorialor the GitHub project page(both wrote by me - the project is open-source).
有关更多信息和下载，您可以查看此简短教程或GitHub 项目页面（均由我编写 - 该项目是开源的）。
回答by ayniam
Yes. There is no dropdown component available in ios. And its really frustrating to build a basic component. However, VPPDropDown is there to solve your problem. https://github.com/vicpenap/VPPDropDown
是的。ios 中没有可用的下拉组件。构建一个基本组件真的很令人沮丧。但是，VPPDropDown 可以解决您的问题。https://github.com/vicpenap/VPPDropDown
回答by rahul
There is no dropdown available in iOS. You should create it with text field and tableview. Use below links for references:
iOS 中没有可用的下拉菜单。您应该使用文本字段和 tableview 创建它。使用以下链接作为参考：
iOS-Examples--UITableView-Combo-Box
iOS-Examples--UITableView-Combo-Box
回答by Seungyoun Yi
you can see this one too. This library is written with Swift 3
你也可以看到这个。这个库是用 Swift 3 编写的
https://github.com/younatics/YNDropDownMenu
https://github.com/younatics/YNDropDownMenu
回答by manish
http://gabriel-tips.blogspot.in/2011/10/uitableview-display-and-hide-cells-as.htmlyou can take it as reference, table view is good and efficient way for dropdown. if you got any other way then please let me know..
http://gabriel-tips.blogspot.in/2011/10/uitableview-display-and-hide-cells-as.html你可以把它作为参考，表格视图是下拉菜单的好方法。如果您有任何其他方式，请告诉我..
回答by Vishal Singh
Adding more options here. People looking for dropdown in iOS can also give VSDropdown a try:
在此处添加更多选项。在 iOS 中寻找下拉菜单的人也可以试试 VSDropdown：
It automatically controls many stuffs like frame, direction, appearance and dismissal when tapped outside bounds.
当在边界外轻敲时，它会自动控制许多东西，如框架、方向、外观和解除。
