仿网易顶部滑动选择分类视图

#import <UIKit/UIKit.h>

@protocol CustomSelectViewDelegate <NSObject>

-(void)selectedButtonTag:(NSInteger)tag;

@end

@interface CustomSelectView : UIView

//红线

@property (nonatomic, strong) UILabel *redLabel;

//数据源

@property (nonatomic, strong) NSMutableArray *tableArray;

@property (nonatomic, strong) NSString *selectedString;

//中间变量按钮

@property (strong,nonatomic) UIButton *tempBtn;

@property (nonatomic, assign) CGFloat oldViewWidth;

//滚动视图

@property (nonatomic, strong) UIScrollView *myScroll;

@property (nonatomic, assign) id<CustomSelectViewDelegate>myDelegate;

- (id)initWithFrame:(CGRect)frame dataArray:(NSArray *)array;

-(void)updateView;

-(void)touchDownButtonClicked:(id)sender;

#import "CustomSelectView.h"

@implementation CustomSelectView

@synthesize redLabel,tableArray,tempBtn,myScroll;

- (id)initWithFrame:(CGRect)frame dataArray:(NSArray *)array

{

    self = [super initWithFrame:frame];

    if (self)

    {

        self.backgroundColor = [UIColor whiteColor];

        CGFloat curW = frame.size.width;

        CGFloat curH = frame.size.height;

        

        

        CGFloat bw = curW/7;

        CGFloat bh = 32;

        CGFloat bx = 0;

        CGFloat by = 6;

        self.myScroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, curW, curH)];

        self.myScroll.showsHorizontalScrollIndicator = NO;

        self.myScroll.showsVerticalScrollIndicator = NO;

//        self.myScroll.backgroundColor = [UIColor yellowColor];

        [self addSubview:self.myScroll];

        

        UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(curW, 12,1 , curH-20)];

        lineView.backgroundColor = [UIColor colorWithRed:241/255.0 green:241/255.0 blue:241/255.0 alpha:1];

        [self addSubview:lineView];

                

    }

    return self;

}

-(void)updateView

{

    for (UIView *vw in self.myScroll.subviews)

    {

        [vw removeFromSuperview];

    }

    

    CGFloat curW = self.frame.size.width;

    CGFloat curH = self.frame.size.height;

    

    CGFloat bw = curW/7;

    CGFloat bh = 32;

    CGFloat bx = 0;

    CGFloat by = 6;

    

    for (int i = 0; i < self.tableArray.count; i++)

    {

        UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(bx, by, bw, bh)];

        button.tag = 100+i;

        button.titleLabel.font = [UIFont systemFontOfSize:14.0];

        IndexLeiMuObject *leiMuObj = [tableArray objectAtIndex:i];

        NSString *titleString = leiMuObj.sourceName;

        [button setTitle:titleString forState:UIControlStateNormal];

//        [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

        button.backgroundColor = [UIColor whiteColor];

        [self.myScroll addSubview:button];

        [button addTarget:self action:@selector(touchDownButtonClicked:) forControlEvents:UIControlEventTouchUpInside];

        bx += bw;

        if([self.selectedString isEqualToString:titleString])

        {

            tempBtn = button;

            button.titleLabel.font = [UIFont systemFontOfSize:14.0];

            [button setTitleColor:[UIColor colorWithRed:250.0/255.0 green:9.0/255.0 blue:58.0/255.0 alpha:1.0] forState:UIControlStateNormal];

        }

        else

        {

            button.titleLabel.font = [UIFont systemFontOfSize:14.0];

            [button setTitleColor:[UIColor colorWithRed:90/255.0 green:90/255.0 blue:90/255.0 alpha:1] forState:UIControlStateNormal];

        }

        

        [self.myScroll addSubview:button];

    }

    

    self.redLabel = [[UILabel alloc] initWithFrame:CGRectMake(5, curH-3, bw-10, 2)];

    self.redLabel.backgroundColor = [UIColor colorWithRed:250/255.0 green:9/255.0 blue:58/255.0 alpha:1];

    [self.myScroll addSubview:self.redLabel];

    

    self.myScroll.contentSize = CGSizeMake(bx,0);

   

}

- (void)touchDownButtonClicked:(id)sender

{

    [UIView animateWithDuration:0.2 animations:^{

        tempBtn.titleLabel.font = [UIFont systemFontOfSize:14.0];

        [tempBtn setTitleColor:[UIColor colorWithRed:90/255.0 green:90/255.0 blue:90/255.0 alpha:1] forState:UIControlStateNormal];

        UIButton *btn = sender;

        

//        if(daPaiFanArray)

//        {

//            NSDictionary *diationary = [daPaiFanArray objectAtIndex:btn.tag-100];

//            [self.topScrollviewDelegate selectIndexRow:btn.tag-100];

//            NSString *sourceName = [diationary objectForKey:@"browse_value"];

//            self.selectedString = sourceName;

//            btn.titleLabel.font = [UIFont fontWithName:@"YouYuan" size:18];

//            [btn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];

//            selectOldButton = btn;

//            

//            if(isNormalType)

//            {

//                return ;

//            }

//            if(btn.frame.origin.x+btn.frame.size.width/2-self.oldViewWidth/2>=0 && btn.frame.origin.x+btn.frame.size.width/2+self.oldViewWidth/2<=self.contentSize.width)

//            {

//                [self setContentOffset:CGPointMake(btn.frame.origin.x+btn.frame.size.width/2-self.oldViewWidth/2, btn.frame.origin.y) animated:YES];

//            }

//            else if(btn.frame.origin.x+btn.frame.size.width/2-self.oldViewWidth/2<0)

//            {

//                [self setContentOffset:CGPointMake(0, btn.frame.origin.y) animated:YES];

//            }

//            else if(btn.frame.origin.x+btn.frame.size.width/2+self.oldViewWidth/2>self.contentSize.width)

//            {

//                [self setContentOffset:CGPointMake(self.contentSize.width-self.frame.size.width, btn.frame.origin.y) animated:YES];

//            }

//        }

//        else

//        {

            IndexLeiMuObject *leiMuObj = [tableArray objectAtIndex:btn.tag-100];

            [self.myDelegate selectedButtonTag:btn.tag];

            self.selectedString = leiMuObj.sourceName;

            btn.titleLabel.font = [UIFont systemFontOfSize:14.0];

            [btn setTitleColor:[UIColor colorWithRed:250/255.0 green:9/255.0 blue:58/255.0 alpha:1] forState:UIControlStateNormal];

         self.redLabel.center = btn.center;

        CGRect redLabelFrame = self.redLabel.frame;

        redLabelFrame.origin.y = btn.frame.origin.y+btn.frame.size.height-1;

        self.redLabel.frame = redLabelFrame;

            tempBtn = btn;

            

//            if(isNormalType)

//            {

//                return ;

//            }

        

        if(btn.frame.origin.x+btn.frame.size.width/2-self.oldViewWidth/2>=0 && btn.frame.origin.x+btn.frame.size.width/2+self.oldViewWidth/2<=self.myScroll.contentSize.width)

        {

            [self.myScroll setContentOffset:CGPointMake(btn.frame.origin.x+btn.frame.size.width/2-self.oldViewWidth/2, 0) animated:YES];

        }

        else if(btn.frame.origin.x+btn.frame.size.width/2-self.oldViewWidth/2<0)

        {

            [self.myScroll setContentOffset:CGPointMake(0, 0) animated:YES];

        }

        else if(btn.frame.origin.x+btn.frame.size.width/2+self.oldViewWidth/2>self.myScroll.contentSize.width)

        {

            [self.myScroll setContentOffset:CGPointMake(self.myScroll.contentSize.width-self.frame.size.width, 0) animated:YES];

        }

        

//        }

    }];

}

@end

方式二 －－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

#import <UIKit/UIKit.h>

#import "SheJiaoTopObject.h"

@protocol CustomHomeSelectViewDelegate <NSObject>

//选中类目

- (void)CustomHomeSelectViewDelegateTitleView:(NSInteger)row;

//选中更多事件

- (void)CustomHomeSelectViewDelegateMoreButton;

@end

@interface CustomHomeSelectView : UIView

{

    UIButton *oldButton;

}

@property(nonatomic, weak) id<CustomHomeSelectViewDelegate> delegate;

//红线

@property(nonatomic, strong) UIView *redLineView;

//下拉按钮

@property(nonatomic, strong) UIButton *xialaButton;

//记录数据

@property(nonatomic, strong) NSMutableArray *dataArray;

//添加滚动试图

@property (nonatomic, strong) UIScrollView *myScroll;

@property (nonatomic, assign) NSInteger dataCount;

@property (nonatomic, assign) CGFloat oldViewWidth;

- (id)initWithFrame:(CGRect)frame titleArray:(NSMutableArray *)array;

//修改选中的项

- (void)updateSelectedButton:(IndexLeiMuObject *)topObject row:(NSInteger)row;

//更新数据

-(void)updateView;

@end

#import "CustomHomeSelectView.h"

#define HomeButtonSelectedBGColor [UIColor colorWithRed:241.0/255.0 green:242.0/255.0 blue:244.0/255.0 alpha:1.0]

#define HomeBoderBGColor [UIColor colorWithRed:220.0/255.0 green:221.0/255.0 blue:222.0/255.0 alpha:1.0]

#define HomeButtonTag 2000

#define HomeTitleTag 3000

#define HomeButtonTitleBGColor [UIColor colorWithRed:49.0/255.0 green:50.0/255.0 blue:51.0/255.0 alpha:1.0]

#define HomeButtonTitleSelectedBGColor [UIColor colorWithRed:247.0/255.0 green:64.0/255.0 blue:88.0/255.0 alpha:1.0]

@implementation CustomHomeSelectView

@synthesize delegate,redLineView,xialaButton,dataArray,myScroll;

- (id)initWithFrame:(CGRect)frame titleArray:(NSMutableArray *)array

{

    self = [super initWithFrame:frame];

    if(self)

    {

//        self.dataArray = array;

        //初始化数据

        [self setBackgroundColor:[UIColor whiteColor]];

        

        self.myScroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, frame.size.width-(frame.size.height-2), frame.size.height)];

//        self.myScroll.backgroundColor = [UIColor yellowColor];

        self.myScroll.showsHorizontalScrollIndicator = NO;

        self.myScroll.showsVerticalScrollIndicator = NO;

        [self addSubview:self.myScroll];

        

        

//        UIButton *hotButton;

//        //计算宽度

//        CGFloat bw = (frame.size.width-25-(array.count-1)*1)/array.count;

//        CGFloat bh = frame.size.height-2;

//        CGFloat bx = 0;

//        for (int i=0; i<array.count; i++) {

//            SheJiaoTopObject *topObject = [array objectAtIndex:i];

//            bx = i *bw;

//            if(i>0)

//            {

//                bx = i*bw + i*1;

//            }

//            CGRect rect = CGRectMake(bx, 1, bw, bh);

//            UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

//            button.tag = HomeButtonTag+i;

//            button.frame = rect;

//            [button setTitleColor:HomeButtonTitleBGColor forState:UIControlStateNormal];

//            [button setTitle:topObject.titleName forState:UIControlStateNormal];

//            [button.titleLabel setFont:[UIFont systemFontOfSize:14]];

//            [button addTarget:self action:@selector(clickedHomeButton:) forControlEvents:UIControlEventTouchUpInside];

//            [self.myScroll addSubview:button];

//            if(i == 0)

//            {

//                [button setTitleColor:HomeButtonTitleSelectedBGColor forState:UIControlStateNormal];

//                oldButton = button;

//            }

//            if([topObject.titleName isEqualToString:@"一元抢"])

//            {

//                hotButton = button;

//            }

//            if(i+1 == array.count) //最后一个添加下拉按钮

//            {

//                CGFloat xialaW = bh;

//                self.xialaButton = [[UIButton alloc] initWithFrame:CGRectMake(frame.size.width-xialaW, 1, xialaW, bh)];

//                CGSize size = self.xialaButton.frame.size;

//                CGFloat imageH = 10;

//                UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake((size.width-imageH)/2-5, (size.height-imageH)/2, imageH, imageH)];

//                [imageView setImage:[UIImage imageNamed:@"bbbaoNew_xialade.png"]];

//                [self.xialaButton addSubview:imageView];

//                [self.xialaButton addTarget:self action:@selector(clickedMoreButton) forControlEvents:UIControlEventTouchUpInside];

//                [self addSubview:self.xialaButton];

//

//            }

//        }

//        

//        self.myScroll.contentSize = CGSizeMake(bx,0);

//        //添加红线

//        UITextView *textView = [[UITextView alloc] initWithFrame:oldButton.bounds];

//        textView.text = oldButton.titleLabel.text;

//        CGFloat redLineW = [NSString getFormatUILabelWidth:textView]+8;

//        CGFloat redLineX = oldButton.frame.origin.x+(oldButton.frame.size.width-redLineW)/2;

//        self.redLineView = [[UIView alloc] initWithFrame:CGRectMake(redLineX, bh-1, redLineW, 2)];

//        [self.redLineView setBackgroundColor:[UIColor redColor]];

//        [self.myScroll addSubview:self.redLineView];

//        

//        //添加热度图片

//        textView = [[UITextView alloc] initWithFrame:oldButton.bounds];

//        textView.text = hotButton.titleLabel.text;

//        redLineW = [NSString getFormatUILabelWidth:textView]+8;

//        CGFloat hotX = hotButton.frame.size.width/2+redLineW/2;

//        UIImageView *hotImageView = [[UIImageView alloc] initWithFrame:CGRectMake(hotX, 0, 20, 18)];

//        [hotImageView setImage:[UIImage imageNamed:@"bbbaoNew_hot.png"]];

//        hotImageView.userInteractionEnabled = NO;

//        [hotButton addSubview:hotImageView];

    }

    return self;

}

//修改选中的项

- (void)updateSelectedButton:(IndexLeiMuObject *)topObject row:(NSInteger)row

{

    if(oldButton)

    {

        [oldButton setTitleColor:HomeButtonTitleBGColor forState:UIControlStateNormal];

    }

    //改变选中的button名字

    

    

     UIButton *button =  (UIButton *)[self.myScroll viewWithTag:HomeButtonTag+row];

    

//    if(topObject.jiluNumber == 4)

//    {

//        [button setTitle:topObject.titleName forState:UIControlStateNormal];

//    }

    [button setTitleColor:HomeButtonTitleSelectedBGColor forState:UIControlStateNormal];

    oldButton = button;

    //改变红色线条

    UITextView *textView = [[UITextView alloc] initWithFrame:button.bounds];

    textView.text = button.titleLabel.text;

    CGFloat redLineW = [NSString getFormatUILabelWidth:textView]+8;

    CGRect redRect = self.redLineView.frame;

    redRect.origin.x = button.frame.origin.x+(button.frame.size.width-redLineW)/2;

    redRect.size.width = redLineW;

    self.redLineView.frame = redRect;

    

    if(button.frame.origin.x+button.frame.size.width/2-self.oldViewWidth/2>=0 && button.frame.origin.x+button.frame.size.width/2+self.oldViewWidth/2<=self.myScroll.contentSize.width)

    {

        [self.myScroll setContentOffset:CGPointMake(button.frame.origin.x+button.frame.size.width/2-self.oldViewWidth/2, 0) animated:YES];

    }

    else if(button.frame.origin.x+button.frame.size.width/2-self.oldViewWidth/2<0)

    {

        [self.myScroll setContentOffset:CGPointMake(0, 0) animated:YES];

    }

    else if(button.frame.origin.x+button.frame.size.width/2+self.oldViewWidth/2>self.myScroll.contentSize.width)

    {

        [self.myScroll setContentOffset:CGPointMake(self.myScroll.contentSize.width-self.frame.size.width+30, 0) animated:YES];

    }

}

//点击按钮事件

- (void)clickedHomeButton:(id)sender

{

    UIButton *button = sender;

    //改变它的样式

    NSInteger row = button.tag - HomeButtonTag;

    IndexLeiMuObject *leiMuObj = [self.dataArray objectAtIndex:row];

    [self updateSelectedButton:leiMuObj row:row];

   

    oldButton = button;

    

    [self.delegate CustomHomeSelectViewDelegateTitleView:row];

}

//点击更多类目

- (void)clickedMoreButton

{

    [self.delegate CustomHomeSelectViewDelegateMoreButton];

}

//---------

-(void)updateView

{

    for (UIView *vw in self.myScroll.subviews)

    {

        [vw removeFromSuperview];

    }

    

    CGFloat curW = self.frame.size.width;

    CGFloat curH = self.frame.size.height;

    

    UIButton *hotButton;

    //计算宽度

//    CGFloat bw = (self.frame.size.width-25-(self.dataArray.count-1)*1)/self.dataArray.count;

    CGFloat bw = 50;

    CGFloat bh = curH-2;

    CGFloat bx = 10;

    NSInteger count = self.dataArray.count;

    NSString *titleName;

    for (int i=0; i < self.dataArray.count; i++)

    {

        IndexLeiMuObject *topObject = [self.dataArray objectAtIndex:i];

        titleName = topObject.sourceName;

        

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];

        //添加红线

        UITextView *textView = [[UITextView alloc] initWithFrame:button.bounds];

        textView.text = titleName;

        bw = [NSString getFormatUILabelWidth:textView]+8;

        CGRect rect = CGRectMake(bx, 1, bw, bh);

        button.tag = HomeButtonTag+i;

        button.frame = rect;

        [button setTitleColor:HomeButtonTitleBGColor forState:UIControlStateNormal];

        [button setTitle:titleName forState:UIControlStateNormal];

        [button.titleLabel setFont:[UIFont systemFontOfSize:14]];

        [button addTarget:self action:@selector(clickedHomeButton:) forControlEvents:UIControlEventTouchUpInside];

        [self.myScroll addSubview:button];

        if(i == 0)

        {

            [button setTitleColor:HomeButtonTitleSelectedBGColor forState:UIControlStateNormal];

            oldButton = button;

        }

        if(i+1 == self.dataArray.count) //最后一个添加下拉按钮

        {

            CGFloat xialaW = bh;

            self.xialaButton = [[UIButton alloc] initWithFrame:CGRectMake(curW-xialaW, 1, xialaW, bh)];

            CGSize size = self.xialaButton.frame.size;

            CGFloat imageH = 10;

            UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake((size.width-imageH)/2-5, (size.height-imageH)/2, imageH, imageH)];

            [imageView setImage:[UIImage imageNamed:@"bbbaoNew_xialade.png"]];

            [self.xialaButton addSubview:imageView];

            [self.xialaButton addTarget:self action:@selector(clickedMoreButton) forControlEvents:UIControlEventTouchUpInside];

            [self addSubview:self.xialaButton];

            

        }

        bx += bw+10;

    }

    

    self.myScroll.contentSize = CGSizeMake(bx,0);

    //添加红线

    UITextView *textView = [[UITextView alloc] initWithFrame:oldButton.bounds];

    textView.text = oldButton.titleLabel.text;

    CGFloat redLineW = [NSString getFormatUILabelWidth:textView]+8;

    CGFloat redLineX = oldButton.frame.origin.x+(oldButton.frame.size.width-redLineW)/2;

    self.redLineView = [[UIView alloc] initWithFrame:CGRectMake(redLineX, bh-1, redLineW, 2)];

    [self.redLineView setBackgroundColor:[UIColor redColor]];

    [self.myScroll addSubview:self.redLineView];

    

}

@end