https://github.com/520coding/ftroulette

ios轮盘，圆形指示器
https://github.com/520coding/ftroulette

cocoapods demo ios objective-c roulette xcode

Last synced: 3 months ago
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ios轮盘，圆形指示器

• Host: GitHub
• URL: https://github.com/520coding/ftroulette
• Owner: 520coding
• License: mit
• Created: 2020-07-27T09:10:02.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-08-31T07:09:07.000Z (almost 5 years ago)
• Last Synced: 2025-04-11T02:03:22.258Z (3 months ago)
• Topics: cocoapods, demo, ios, objective-c, roulette, xcode
• Language: Objective-C
• Homepage:
• Size: 9.04 MB
• Stars: 12
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# FTroulette

[![CI Status](https://img.shields.io/travis/[email protected]/FTroulette.svg?style=flat)](https://travis-ci.org/[email protected]/FTroulette)

[![Version](https://img.shields.io/cocoapods/v/FTroulette.svg?style=flat)](https://cocoapods.org/pods/FTroulette)

[![License](https://img.shields.io/cocoapods/l/FTroulette.svg?style=flat)](https://github.com/520coding/FTroulette/blob/master/LICENSE)

[![Platform](https://img.shields.io/cocoapods/p/FTroulette.svg?style=flat)](https://cocoapods.org/pods/FTroulette)

## Example

To run the example project, clone the repo, and run `pod install` from the Example directory first.

## Requirements

## Installation

FTroulette is available through [CocoaPods](https://cocoapods.org). To install

it, simply add the following line to your Podfile:

```ruby

pod 'FTroulette'

```

## Principle

1.以触碰点P与圆心O1为起始边，对±θ角范围内的刻度线进行偏移。角θ可根据三角形O1O2A，利用余弦定理，已知三边求角：a=r，b=R，c=R-d 代入即可求得α，即θ

![Image text](https://github.com/520coding/FTroulette/blob/master/ScreenShots/%E4%BD%99%E5%BC%A6%E5%AE%9A%E7%90%86.svg)




2.原刻度线ab，偏移后得到新刻度线a'b'，新刻度线的位置L，可根据三角形O1O2a'，利用余弦定理结合完全平方公式，已知两边和一角求第三边：∠γ=∠α-∠β，a=R-d，c=r 代入即可求得b，即L

![Image text](https://github.com/520coding/FTroulette/blob/master/ScreenShots/%E4%BD%99%E5%BC%A6%E5%AE%9A%E7%90%862.svg)




## Demo

![Image text](https://github.com/520coding/FTroulette/blob/master/ScreenShots/demo.gif)

注意：如遇到图片加载缓慢或失败，请参照——[解决办法](https://blog.csdn.net/u011583927/article/details/104384169?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-1.channel_param)


## Author

[email protected], [email protected]

## License

FTroulette is available under the MIT license. See the LICENSE file for more info.