我怎么能做一个水平选择器？

问题描述

我想为我的应用程序制作一个水平选择器，但我一直都很新。

I want to make a horizontal picker for my app, but I'm kinda new at all this. Could someone provide an easy to follow guide on how I'd make this?

推荐答案

iOS开源水平选择器组件刚刚在上发布。

An open-source horizontal picker component for iOS has just been released on GitHub.

它可以添加到UITableViewCell如下（在 tableView：cellForRowAtIndexPath：）：

It can be added to a UITableViewCell as follows (in tableView:cellForRowAtIndexPath:):

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
STHorizontalPicker *horizontalPickerView = [[STHorizontalPicker alloc] initWithFrame:cell.frame];
horizontalPickerView.name = @"myPicker";
[horizontalPickerView setMinimumValue:0.0];
[horizontalPickerView setMaximumValue:100.0];
[horizontalPickerView setSteps:100];
[horizontalPickerView setDelegate:self];
[horizontalPickerView setValue:50.0];

它没有以任何方式拥有UIPickerView的所有功能，方法来实现一个控件（UIScrollView包含一个UIView与多个CATextLayers的标记），并有一些很好的功能，如捕捉到标记。

It doesn't have all of the features of a UIPickerView by any means, but it illustrates one possible way to implement a control (a UIScrollView containing a UIView with multiple CATextLayers for the markers) and has a couple of nice features like snapping to markers.

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