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标题: HMSegmentedControl源代码解析（1） [打印本页]

作者: look_w 时间: 2019-2-19 17:33 标题: HMSegmentedControl源代码解析（1）

HMSegmentedControl是一款选项卡的三方框架，github上有3000星左右。
研究了一下源码，并添加了一点注释。

HMSegmentedControl基于UIControl，上面有一个UIScrollView。
文字，图片，指示器都是用CALayer,UIBezierPath处理创建的。

//
//  HMSegmentedControl.h
//  HMSegmentedControl
//
//  Created by Hesham Abd-Elmegid on 23/12/12.
//  Copyright (c) 2012-2015 Hesham Abd-Elmegid. All rights reserved.
//

#import <UIKit/UIKit.h>

@class HMSegmentedControl;

//点击按钮的block
typedef void (^IndexChangeBlock)(NSInteger index);

//Title富文本
typedef NSAttributedString *(^HMTitleFormatterBlock)(HMSegmentedControl *segmentedControl, NSString *title, NSUInteger index, BOOL selected);

//指示器的样式
typedef NS_ENUM(NSInteger, HMSegmentedControlSelectionStyle) {
      //指示器和文字同宽
      HMSegmentedControlSelectionStyleTextWidthStripe, // Indicator width will only be as big as the text width
      //指示器和segment同宽
      HMSegmentedControlSelectionStyleFullWidthStripe, // Indicator width will fill the whole segment
      //矩形指示器
      HMSegmentedControlSelectionStyleBox, // A rectangle that covers the whole segment
      //箭头指示器
      HMSegmentedControlSelectionStyleArrow // An arrow in the middle of the segment pointing up or down depending on `HMSegmentedControlSelectionIndicatorLocation`
};

//指示器位置样式
typedef NS_ENUM(NSInteger, HMSegmentedControlSelectionIndicatorLocation) {
      //上
      HMSegmentedControlSelectionIndicatorLocationUp,
      //下
      HMSegmentedControlSelectionIndicatorLocationDown,
      //无
      HMSegmentedControlSelectionIndicatorLocationNone // No selection indicator
};

typedef NS_ENUM(NSInteger, HMSegmentedControlSegmentWidthStyle) {
      //宽度fix
      HMSegmentedControlSegmentWidthStyleFixed, // Segment width is fixed
      //segment的宽度和text的宽度一致
      HMSegmentedControlSegmentWidthStyleDynamic, // Segment width will only be as big as the text width (including inset)
};

//边框类型
typedef NS_OPTIONS(NSInteger, HMSegmentedControlBorderType) {
      HMSegmentedControlBorderTypeNone = 0,
      HMSegmentedControlBorderTypeTop = (1 << 0),
      HMSegmentedControlBorderTypeLeft = (1 << 1),
      HMSegmentedControlBorderTypeBottom = (1 << 2),
      HMSegmentedControlBorderTypeRight = (1 << 3)
};

enum {
      HMSegmentedControlNoSegment = -1 // Segment index for no selected segment
};

//segment类型
typedef NS_ENUM(NSInteger, HMSegmentedControlType) {
      //文本
      HMSegmentedControlTypeText,
      //图片
      HMSegmentedControlTypeImages,
      //图文
      HMSegmentedControlTypeTextImages
};

@interface HMSegmentedControl : UIControl

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