我怎么能做一个水平选择器？ [英] How could I make a horizontal picker?

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 GitHub 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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