If you have comments, just post the code directly

#import  @protocol CJNaviViewDelegate  - (void)D_selectedTag:(NSInteger)tag; @end @interface CJNaviView : UIView - (instancetype)initWithNumberOfTitles:(NSArray *)titles andFrame:(CGRect)frame delegate:(id)delegate; @end CJNaviView.m #import "CJNaviView.h" #define kSelectedColor [UIColor grayColor] #define kNormalColor [UIColor lightGrayColor] // Button进行封装 @interface CJNaviButton:UIButton @property (nonatomic, weak) UIView *lineView; @end @implementation CJNaviButton - (instancetype)initWithFrame:(CGRect)frame{ if (self = [super initWithFrame:frame]) { CGFloat lineWidth = 3; UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, frame.size.height - lineWidth, frame.size.width, lineWidth)]; // 设置初始状态 lineView.backgroundColor = kNormalColor; // lineView.hidden = YES; _lineView = lineView; [self setTitleColor:kNormalColor forState:UIControlStateNormal]; self.titleLabel.font = [UIFont systemFontOfSize:14]; [self setBackgroundColor:[UIColor whiteColor]]; [self addSubview:lineView]; } return self; } @end @interface CJNaviView() @property (nonatomic, weak) id delegate; @property (nonatomic, strong) CJNaviButton *lastClickButton; @end @implementation CJNaviView /** * init方法 * * @param titles title数组 :@[@"选项1",@"选项2"] * @param frame 整个naviView frame * @param delegate 设置代理 * * @return CJNaviView实例 */ - (instancetype)initWithNumberOfTitles:(NSArray *)titles andFrame:(CGRect)frame delegate:(id)delegate{ if (self = [super initWithFrame:frame]) { // 设置代理 self.delegate = delegate; CGFloat buttonWidth = SCREENSIZE.width / titles.count; for (int i = 0; i < titles.count; i ++) { CJNaviButton *button = [[CJNaviButton alloc] initWithFrame:CGRectMake(i *buttonWidth, 0, buttonWidth, frame.size.height)]; // 默认选中第一个 设置状态 if (i == 0) { [button setTitleColor:kSelectedColor forState:UIControlStateNormal]; button.lineView.backgroundColor = kSelectedColor; // 保留为上次选择中的button _lastClickButton = button; } // 设置对应的tag button.tag = i; [button setTitle:titles[i] forState:UIControlStateNormal]; [button addTarget:self action:@selector(A_choosed:) forControlEvents:UIControlEventTouchUpInside]; [self addSubview:button]; } } return self; } - (void)A_choosed:(CJNaviButton *)button{ // 连续点击同一个不响应回调 if (_lastClickButton != button) { // 设置状态 [button setTitleColor:kSelectedColor forState:UIControlStateNormal]; button.lineView.backgroundColor = kSelectedColor; [_lastClickButton setTitleColor:kNormalColor forState:UIControlStateNormal]; _lastClickButton.lineView.backgroundColor = kNormalColor; _lastClickButton = button; // 回调 可用block if ([self.delegate respondsToSelector:@selector(D_selectedTag:)]) { [self.delegate D_selectedTag:button.tag]; } } }

The uisegmentedcontrol provided by the system has too little customizable content. In my projects, I usually use UIView + UIButton to achieve similar effects