封装顶部选择按钮（用block实现在当前控制器下面添加button点击方法）

******************************************************************************

baseView.h

#import<UIKit/UIKit.h>

typedefvoid(^ClickBlock)(UIButton *);

@interface baseView :UIView
{
    BOOL isSelected;
}
@property(nonatomic,copy)ClickBlock block;
@property (nonatomic,retain)UIButton *btn;
@property (nonatomic,retain)UIView *smallLineV;
@property (nonatomic,retain)NSArray *titleArr;

-(instancetype)initWithFrame:(CGRect)frame titleArr : (NSArray *)titleArr;
- (void)addBlock:(ClickBlock)block;

@end

******************************************************************************

baseView.m

#import"baseView.h"
#import "UIViewExt.h"
// 获取设备屏幕的物理尺寸
#define kScreenHeight [UIScreen mainScreen].bounds.size.height
#define kScreenWidth [UIScreen mainScreen].bounds.size.width

@implementation baseView
-(instancetype)initWithFrame:(CGRect)frame titleArr : (NSArray *)titleArr
{self = [superinitWithFrame:frame];
    if (self) {
        self.titleArr = titleArr;
        [self_initViews];
    }
    returnself;
}

-(void)_initViews
{
    for (int i = 0; i <_titleArr.count ; i ++) {
        self.btn = [UIButtonbuttonWithType:UIButtonTypeCustom];
        _btn.frame = CGRectMake(kScreenWidth/_titleArr.count * i, 0,kScreenWidth/_titleArr.count,self.height - 1);
        _btn.tag = i;
        [_btnsetTitle:_titleArr[i]forState:UIControlStateNormal];
        [_btnsetTitleColor:[UIColorcolorWithRed:0.66fgreen:0.66fblue:0.66falpha:1.00f]forState:UIControlStateNormal];
        [_btnaddTarget:selfaction:@selector(btnAction:)forControlEvents:UIControlEventTouchUpInside];
        [selfaddSubview:_btn];
       
    }
    _smallLineV = [[UIViewalloc]initWithFrame:CGRectMake(0,self.height , kScreenWidth/_titleArr.count,1)];
    _smallLineV.backgroundColor = [UIColorcolorWithRed:0.24fgreen:0.25fblue:0.23falpha:1.00f];
    [selfaddSubview:_smallLineV];
    UIView *lineV = [[UIViewalloc]initWithFrame:CGRectMake(0,0,kScreenWidth,1)];
    lineV.top =self.height - 1;
    lineV.backgroundColor = [UIColorcolorWithRed:0.95fgreen:0.95fblue:0.95falpha:1.00f];
    [selfaddSubview:lineV];

   
}
- (void)addBlock:(ClickBlock)block
{
   [_btnaddTarget:selfaction:@selector(btnAction:)forControlEvents:UIControlEventTouchUpInside];
   self.block = block;
}
#pragma mark按钮点击事件
-(void)btnAction : (UIButton *)btn
{
    if (self.block != nil) {
        self.block(btn);
    }
    _smallLineV.frame = CGRectMake(kScreenWidth/_titleArr.count *btn.tag,self.height , kScreenWidth/_titleArr.count,1);
    for(id cc in [selfsubviews])
    {
        if([ccisKindOfClass:[UIButtonclass]])
        {
            UIButton *btn = (UIButton *)cc;
            [btn setTitleColor:[UIColorcolorWithRed:0.66fgreen:0.66fblue:0.66falpha:1.00f]forState:UIControlStateNormal];
        }
    }
    isSelected = !isSelected;
    if (!isSelected) {
        [btn setTitleColor:[UIColorcolorWithRed:0.66fgreen:0.66fblue:0.66falpha:1.00f]forState:UIControlStateNormal];
    }else
    {
        [btn setTitleColor:[UIColorcolorWithRed:0.00fgreen:0.00fblue:0.00falpha:1.00f] forState:UIControlStateNormal];
        isSelected =NO  ;
    }

}

@end

******************************************************************************

ViewController.h

#import<UIKit/UIKit.h>

@interface ViewController :UIViewController

@end

******************************************************************************

ViewController.m

#import"ViewController.h"
#import "baseView.h"
// 获取设备屏幕的物理尺寸
#define kScreenHeight [UIScreen mainScreen].bounds.size.height
#define kScreenWidth [UIScreen mainScreen].bounds.size.width

@interfaceViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [superviewDidLoad];
    NSArray *arr =@[@"你好",@"是的",@"不是的"];
    __blockViewController *this =self;
    baseView *baseV = [[baseViewalloc]initWithFrame:CGRectMake(0,44,kScreenWidth,30)titleArr:arr];
    [baseV addBlock:^(UIButton *btn) {
        [this text:btn];
    }];
    [self.viewaddSubview:baseV];
    // Do any additional setup after loading the view, typically from a nib.
}

-(void)text : (UIButton*)btn
{
    //点击按钮执行的方法
    switch (btn.tag) {
        case0:
        {
            NSLog(@"1111");
        }
            break;
        case1:
        {
            NSLog(@"2222");
 
        }
            break;
        case2:
        {
            NSLog(@"333");

        }

           break;          

       default:
            break;
    }

}

@end

******************************************************************************

效果图如下：