iOS 列表三级展开

效果图如下：

             

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;


@end

#import "AppDelegate.h"
#import "RootViewController.h"
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    
    RootViewController *root = [[RootViewController alloc] init];
    UINavigationController *navi = [[UINavigationController alloc] initWithRootViewController:root];
    self.window.rootViewController = navi;
    
    [self.window makeKeyAndVisible];
    return YES;
}


@end

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController

@end

#import "RootViewController.h"
#import "MainCell.h"
#import "DetialTableViewCell.h"
@interface RootViewController ()<UITableViewDataSource,UITableViewDelegate>
{
    UITableView *_tableView;
    NSMutableDictionary *dic;//存对应的数据
    NSMutableArray *selectedArr;// 二级列表是否展开状态
    NSMutableArray *titleDataArray;
    NSArray *dataArray;//数据源，显示每个cell的数据
    NSMutableDictionary *stateDic;//三级列表是否展开状态
    NSMutableArray *groupArr0;
    NSMutableArray *groupArr1;
    NSMutableArray *groupArr2;
    NSMutableArray *groupArr3;
    NSMutableArray *groupArr4;
    NSMutableArray *groupArr5;
    
}
@end

@implementation RootViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"列表";
    dic = [[NSMutableDictionary alloc] init];
    selectedArr = [[NSMutableArray alloc] init];
    dataArray = [[NSMutableArray alloc] init];
    
    // 初始化tableView
    _tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, 320*scaleX, [UIScreen mainScreen].bounds.size.height) style:UITableViewStylePlain];
    _tableView.delegate = self;
    _tableView.dataSource = self;
    // 隐藏滚动条
    _tableView.showsVerticalScrollIndicator = NO;
    _tableView.showsHorizontalScrollIndicator = NO;
    _tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    [self.view addSubview:_tableView];
    
    // 加载数据
    [self loadData];
}
/**
 *  加载数据
 */
- (void)loadData
{
    titleDataArray = [[NSMutableArray alloc] initWithObjects:@"亲朋",@"家人",@"好友", @"蓝颜",@"同学",@"老乡",nil];
    
    NSMutableDictionary *nameAndStateDic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"小莉",@"name",@"NO",@"state", nil];
    NSMutableDictionary *nameAndStateDic2 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"婷婷",@"name",@"NO",@"state", nil];
    NSMutableDictionary *nameAndStateDic3 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"小庄",@"name",@"NO",@"state", nil];
    
    groupArr0 = [[NSMutableArray alloc] initWithObjects:nameAndStateDic1,nameAndStateDic2,nameAndStateDic3, nil];
    
    NSMutableDictionary *nameAndStateDic4 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"晨晨姐",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic5 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"李涛",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic6 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"海波",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic7 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"张敏",@"name",@"NO",@"state",nil];
    
    groupArr1 = [[NSMutableArray alloc]initWithObjects:nameAndStateDic4,nameAndStateDic5,nameAndStateDic6,nameAndStateDic7, nil];
    
    NSMutableDictionary *nameAndStateDic8 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"杨浩",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic9 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"小明",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic10 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"洋洋",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic11 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"赵蒙",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic12 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"小催",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic13 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"和平",@"name",@"NO",@"state",nil];
    
    groupArr2 = [[NSMutableArray alloc]initWithObjects:nameAndStateDic8,nameAndStateDic9,nameAndStateDic10,nameAndStateDic11,nameAndStateDic12,nameAndStateDic13,nil];
    
    NSMutableDictionary *nameAndStateDic14 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"超人",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic15 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"怪兽",@"name",@"NO",@"state",nil];
    
    groupArr3 = [[NSMutableArray alloc] initWithObjects:nameAndStateDic14,nameAndStateDic15, nil];
    
    NSMutableDictionary *nameAndStateDic16 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"大包",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic17 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"小林子",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic18 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"石头",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic19 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"小轩轩",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic20 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"阿东",@"name",@"NO",@"state",nil];
    
    groupArr4 = [[NSMutableArray alloc]initWithObjects:nameAndStateDic16,nameAndStateDic17,nameAndStateDic18,nameAndStateDic19,nameAndStateDic20, nil];
    
    NSMutableDictionary *nameAndStateDic21 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"郑平",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic22 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"刘凡",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic23 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"韩琴",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic24 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"刘华健",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic25 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"彭晓明",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic26 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"张欢",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic27 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"刘来楠",@"name",@"NO",@"state",nil];
    NSMutableDictionary *nameAndStateDic28 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",@"任强",@"name",@"NO",@"state",nil];
    
    groupArr5 = [[NSMutableArray alloc]initWithObjects:nameAndStateDic21,nameAndStateDic22,nameAndStateDic23,nameAndStateDic24,nameAndStateDic25,nameAndStateDic26,nameAndStateDic27,nameAndStateDic28, nil];

    [dic setValue:groupArr0 forKey:@"0"];
    [dic setValue:groupArr1 forKey:@"1"];
    [dic setValue:groupArr2 forKey:@"2"];
    [dic setValue:groupArr3 forKey:@"3"];
    [dic setValue:groupArr4 forKey:@"4"];
    [dic setValue:groupArr5 forKey:@"5"];
    
}

#pragma mark - tableViewDelegate - 
// 返回几个表头
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return titleDataArray.count;
}

// 每个表头返回几行
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSString *string = [NSString stringWithFormat:@"%d",(int)section];
    // 如果表头返回值不为零，则修改图片（改成箭头向下的图片）
    if ([selectedArr containsObject:string]) {
        UIImageView *imageView = (UIImageView *)[_tableView viewWithTag:20000 + section];
        imageView.image = [UIImage imageNamed:@"buddy_header_arrow_down"];
        
        NSArray *array1 = dic[string];
        return array1.count;
    }
    return 0;
}

// 设置表头的高度
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    return 40*scaleX;
}
// Section Footer的高度
- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
{
    return 0.2;
}
// 设置view，将替代titleForHeaderInsection方法
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320*scaleX, 30*scaleY)];
    view.backgroundColor = [UIColor whiteColor];
    
    UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(20*scaleX, 5*scaleY, tableView.frame.size.width - 20*scaleX, 30*scaleY)];
    titleLabel.text = [titleDataArray objectAtIndex:section];
    [view addSubview:titleLabel];
    
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(5*scaleX, 12*scaleY, 15*scaleX, 15*scaleY)];
    imageView.tag = 20000+section;

    // 判断是不是选中状态
    NSString *string = [NSString stringWithFormat:@"%d",(int)section];
    if ([selectedArr containsObject:string]) {
        imageView.image = [UIImage imageNamed:@"buddy_header_arrow_down"];
    }else{
        imageView.image = [UIImage imageNamed:@"buddy_header_arrow_right"];
    }
    [view addSubview:imageView];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(0, 0, 320*scaleX, 40*scaleY);
    button.tag = 100 + section;
    [button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
    [view addSubview:button];
    
    UIImageView *lineImage = [[UIImageView alloc] initWithFrame:CGRectMake(0, 40*scaleY - 1, 320*scaleX, 1)];
    lineImage.image = [UIImage imageNamed:@"line"];
    [view addSubview:lineImage];
    
    return view;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *indexStr = [NSString stringWithFormat:@"%d",(int)indexPath.section];
    if ([dic[indexStr][indexPath.row][@"cell"] isEqualToString:@"MainCell"]) {
        return 60*scaleY;
    }else{
        return 40*scaleY;
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // 当前是第几个表头
    NSString *indexStr = [NSString stringWithFormat:@"%d",(int)indexPath.section];
    if ([dic[indexStr][indexPath.row][@"cell"] isEqualToString:@"MainCell"]) {
        static NSString *identifier = @"MainCell";
        MainCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
        
        if (cell == nil) {
            cell = [[MainCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
            cell.selectionStyle = UITableViewCellSelectionStyleGray;
        }
        
        if ([selectedArr containsObject:indexStr]) {
            cell.Headerphoto.image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.png",arc4random()%11]];
            cell.nameLabel.text = dic[indexStr][indexPath.row][@"name"];
            cell.IntroductionLabel.text = @"滴滴雨点仿佛似流泪，滴在我冰冷的身躯";
            cell.networkLabel.text = @"2G";
        }
        // ???
        if (indexPath.row == dataArray.count - 1) {
            cell.imageLine.image = nil;
        }else{
            cell.imageLine.image = [UIImage imageNamed:@"line"];
        }
        return cell;
    }else if ([dic[indexStr][indexPath.row][@"cell"] isEqualToString:@"AttachedCell"]){
        static NSString *detialIdentifier = @"AttachedCell";
        DetialTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:detialIdentifier];
        
        if (cell == nil) {
            cell = [[DetialTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:detialIdentifier];
            cell.selectionStyle = UITableViewCellSeparatorStyleNone;
            cell.imageLine.image = [UIImage imageNamed:@"line"];
        }
        return cell;
    }
    return nil;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // TODO:search
    [_tableView deselectRowAtIndexPath:indexPath animated:YES];
    NSString *indexStr = [NSString stringWithFormat:@"%d",(int)indexPath.section];
    NSIndexPath *path = nil;
    
    if ([dic[indexStr][indexPath.row][@"cell"] isEqualToString:@"MainCell"]) {
        // TODO:search
        path = [NSIndexPath indexPathForItem:(indexPath.row + 1) inSection:indexPath.section];
    }else{
        path = indexPath;
    }    
    if ([dic[indexStr][indexPath.row][@"state"] boolValue]) {
        // 关闭附加cell
        NSMutableDictionary *dd = dic[indexStr][indexPath.row];
        NSString *name = dd[@"name"];
        
        NSMutableDictionary *nameAndStateDic = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",name,@"name",@"NO",@"state", nil];
        
        switch (indexPath.section) {
            case 0:
            {
                groupArr0[(path.row-1)] = nameAndStateDic;
                [groupArr0 removeObjectAtIndex:path.row];
            }
                break;
            case 1:
            {
                groupArr1[(path.row-1)] = nameAndStateDic;
                [groupArr1 removeObjectAtIndex:path.row];
            }
                break;
            case 2:
            {
                groupArr2[(path.row-1)] = nameAndStateDic;
                [groupArr2 removeObjectAtIndex:path.row];
            }
                break;
            case 3:
            {
                groupArr3[(path.row-1)] = nameAndStateDic;
                [groupArr3 removeObjectAtIndex:path.row];
            }
                break;
            case 4:
            {
                groupArr4[(path.row-1)] = nameAndStateDic;
                [groupArr4 removeObjectAtIndex:path.row];
            }
                break;
            case 5:
            {
                groupArr5[(path.row-1)] = nameAndStateDic;
                [groupArr5 removeObjectAtIndex:path.row];
            }
                break;
            default:
                break;
        }
        
        [_tableView beginUpdates];
        [_tableView deleteRowsAtIndexPaths:@[path] withRowAnimation:UITableViewRowAnimationMiddle];
        [_tableView endUpdates];
    }else{
        // 打开附加cell
        NSMutableDictionary *dd = dic[indexStr][indexPath.row];
        NSString *name = dd[@"name"];
        
        NSMutableDictionary *nameAndStateDic = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"MainCell",@"cell",name,@"name",@"YES",@"state", nil];
        switch (indexPath.section) {
            case 0:
            {
                groupArr0[(path.row-1)] = nameAndStateDic;
                NSMutableDictionary *nameAndStateDic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"AttachedCell",@"cell",@"YES",@"state", nil];
                [groupArr0 insertObject:nameAndStateDic1 atIndex:path.row];
            }
                break;
            case 1:
            {
                groupArr1[(path.row-1)] = nameAndStateDic;
                NSMutableDictionary *nameAndStateDic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"AttachedCell",@"cell",@"YES",@"state", nil];
                [groupArr1 insertObject:nameAndStateDic1 atIndex:path.row];
            }
                break;
            case 2:
            {
                groupArr2[(path.row-1)] = nameAndStateDic;
                NSMutableDictionary *nameAndStateDic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"AttachedCell",@"cell",@"YES",@"state", nil];
                [groupArr2 insertObject:nameAndStateDic1 atIndex:path.row];
            }
                break;
            case 3:
            {
                groupArr3[(path.row-1)] = nameAndStateDic;
                NSMutableDictionary *nameAndStateDic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"AttachedCell",@"cell",@"YES",@"state", nil];
                [groupArr3 insertObject:nameAndStateDic1 atIndex:path.row];
            }
                break;
            case 4:
            {
                groupArr4[(path.row-1)] = nameAndStateDic;
                NSMutableDictionary *nameAndStateDic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"AttachedCell",@"cell",@"YES",@"state", nil];
                [groupArr4 insertObject:nameAndStateDic1 atIndex:path.row];
            }
                break;
            case 5:
            {
                groupArr5[(path.row-1)] = nameAndStateDic;
                NSMutableDictionary *nameAndStateDic1 = [NSMutableDictionary dictionaryWithObjectsAndKeys:@"AttachedCell",@"cell",@"YES",@"state", nil];
                [groupArr5 insertObject:nameAndStateDic1 atIndex:path.row];
            }
                break;
            default:
                break;
        }
        [_tableView beginUpdates];
        [_tableView insertRowsAtIndexPaths:@[path] withRowAnimation:UITableViewRowAnimationMiddle];
        [_tableView endUpdates];
    }
}

-(void)buttonAction:(UIButton *)sender
{
    NSString *string = [NSString stringWithFormat:@"%d",(int)(sender.tag-100)];
    
    //数组selectedArr里面存的数据和表头想对应，方便以后做比较
    if ([selectedArr containsObject:string])
    {
        [selectedArr removeObject:string];
    }
    else
    {
        [selectedArr addObject:string];
    }
    
    [_tableView reloadData];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}



@end

#import <UIKit/UIKit.h>

@interface MainCell : UITableViewCell

@property (strong, nonatomic) UILabel *nameLabel;

@property (strong, nonatomic) UILabel *IntroductionLabel;

@property (strong, nonatomic) UILabel *networkLabel;

@property (strong, nonatomic) UIImageView *Headerphoto;

@property (strong, nonatomic) UIImageView *imageLine;

@end

#import "MainCell.h"

@implementation MainCell

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // 头像
        _Headerphoto = [[UIImageView alloc] initWithFrame:CGRectMake(6*scaleX, 5*scaleY, 50*scaleX, 50*scaleX)];
        [self.contentView addSubview:_Headerphoto];
        // 名字
        _nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(60*scaleX, 5*scaleY, 200*scaleX, 25*scaleX)];
        _nameLabel.font = [UIFont systemFontOfSize:15];
        [self.contentView addSubview:_nameLabel];
        // 简介
        _IntroductionLabel = [[UILabel alloc] initWithFrame:CGRectMake(60*scaleX, 28*scaleY, 240*scaleX, 25*scaleX)];
        _IntroductionLabel.backgroundColor = [UIColor clearColor];
        _IntroductionLabel.textColor = [UIColor lightGrayColor];
        _IntroductionLabel.font = [UIFont systemFontOfSize:13];
        [self.contentView addSubview:_IntroductionLabel];
        
        // 网络
        _networkLabel = [[UILabel alloc] initWithFrame:CGRectMake(290*scaleX, 5*scaleY, 50*scaleX, 25*scaleY)];
        _networkLabel.backgroundColor = [UIColor clearColor];
        _networkLabel.textColor = [UIColor lightGrayColor];
        _networkLabel.font = [UIFont systemFontOfSize:13];
        [self.contentView addSubview:_networkLabel];
        
        // 分割线
        _imageLine = [[UIImageView alloc] initWithFrame:CGRectMake(60*scaleX, 60*scaleY - 1, (320 - 60)*scaleX, 1)];
        [self.contentView addSubview:_imageLine];
    }
    return self;
}

@end

#import <UIKit/UIKit.h>

@interface DetialTableViewCell : UITableViewCell

@property (strong, nonatomic) UIImageView *imageLine;

@end

#import "DetialTableViewCell.h"
#import "UIButton+initializer.h"
@implementation DetialTableViewCell

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // 分割线
        _imageLine = [[UIImageView alloc] initWithFrame:CGRectMake(60*scaleX, 40*scaleY - 1, (320 - 60)*scaleY, 1)];
        [self.contentView addSubview:_imageLine];
        
        UIButton *btn1 = [UIButton initButtonWithFrame:CGRectMake(70*scaleX, 9*scaleY, 50*scaleX, 20*scaleY) Title:@"语音" Target:self Selector:@selector(btnAction:)];
        btn1.tag = 100;
        
        UIButton *btn2 = [UIButton initButtonWithFrame:CGRectMake(130*scaleX, 9*scaleY, 50*scaleX, 20*scaleY) Title:@"视频" Target:self Selector:@selector(btnAction:)];
        btn2.tag = 200;
        
        UIButton *btn3 = [UIButton initButtonWithFrame:CGRectMake(190*scaleX, 9*scaleY, 50*scaleX, 20*scaleY) Title:@"图片" Target:self Selector:@selector(btnAction:)];
        btn3.tag = 300;
        
        UIButton *btn4 = [UIButton initButtonWithFrame:CGRectMake(250*scaleX, 9*scaleY, 50*scaleX, 20*scaleY) Title:@"表情" Target:self Selector:@selector(btnAction:)];
        btn4.tag = 400;
        
        [self.contentView addSubview:btn1];
        [self.contentView addSubview:btn2];
        [self.contentView addSubview:btn3];
        [self.contentView addSubview:btn4];
    }
    return self;
}

- (void)btnAction:(UIButton *)sender
{
    switch (sender.tag) {
        case 100:
        {
            NSLog(@"~~~~语音~~~~");
        }
            break;
        case 200:
        {
            NSLog(@"~~~~视频~~~~");
        }
            break;
        case 300:
        {
            NSLog(@"~~~~图片~~~~");
        }
            break;
        case 400:
        {
            NSLog(@"~~~~表情~~~~");
        }
            break;
        default:
            break;
    }
}

- (void)awakeFromNib {
    // Initialization code
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
    [super setSelected:selected animated:animated];

    // Configure the view for the selected state
}

@end

#import <UIKit/UIKit.h>

@interface UIButton (initializer)
/**
 *  初始化button
 *
 *  @param frame        button的尺寸
 *  @param target       button的目标对象
 *  @param selector     点击button所触发的方法
 *  @param image        button的背景图片
 *  @param imagePressed button高亮时的图片
 *
 *  @return button
 */
+ (UIButton *)initButtonWithFrame:(CGRect)frame Target:(id)target Selector:(SEL)selector Image:(NSString *)image ImagePressed:(NSString *)imagePressed;
/**
 *  初始化button
 *
 *  @param frame    button的尺寸
 *  @param title    button的标题
 *  @param target   button的目标对象
 *  @param selector 点击button所触发的方法
 *
 *  @return button
 */
+ (UIButton *)initButtonWithFrame:(CGRect)frame Title:(NSString *)title Target:(id)target Selector:(SEL)selector;

@end

#import "UIButton+initializer.h"

@implementation UIButton (initializer)

+ (UIButton *)initButtonWithFrame:(CGRect)frame Target:(id)target Selector:(SEL)selector Image:(NSString *)image ImagePressed:(NSString *)imagePressed
{
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setFrame:frame];
    UIImage *newImage = [UIImage imageNamed:image];
    [button setBackgroundImage:newImage forState:0];
    UIImage *newPressedImage = [UIImage imageNamed:imagePressed];
    [button setBackgroundImage:newPressedImage forState:UIControlStateHighlighted];
    [button addTarget:target action:selector forControlEvents:UIControlEventTouchUpInside];
    return button;
}

+ (UIButton *)initButtonWithFrame:(CGRect)frame Title:(NSString *)title Target:(id)target Selector:(SEL)selector
{
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button setFrame:frame];
    [button setTitle:title forState:0];
    [button addTarget:target action:selector forControlEvents:UIControlEventTouchUpInside];
    return button;
}

@end

pch文件的代码：

#ifndef QQList_PrefixHeader_pch
#define QQList_PrefixHeader_pch

#define scaleX [UIScreen mainScreen].bounds.size.width/320.0
#define scaleY [UIScreen mainScreen].bounds.size.height/568.0

#endif