135为每行单元格设置展开子项

效果如下：

ViewController.h

 1 #import <UIKit/UIKit.h>

 2 #import "HeaderViewDelegate.h"

 3 #import "HeaderView.h"

 4 

 5 @interface ViewController : UITableViewController<HeaderViewDelegate>

 6 @property (strong, nonatomic) NSMutableArray *mArrHeaderView;

 7 @property (assign, nonatomic) NSInteger currentSection;

 8 @property (assign, nonatomic) NSInteger currentRow;

 9 

10 @end

ViewController.m

  1 #import "ViewController.h"

  2 

  3 @interface ViewController ()

  4 - (void)layoutUI;

  5 @end

  6 

  7 @implementation ViewController

  8 #define kSectionCount 6

  9 #define kRowCount 8

 10 #define kWidthForHeaderView self.view.frame.size.width

 11 #define kHeightForHeaderView 45

 12 #define kHeightForFooterView 1

 13 

 14 - (void)viewDidLoad {

 15     [super viewDidLoad];

 16     

 17     [self layoutUI];

 18 }

 19 

 20 - (void)didReceiveMemoryWarning {

 21     [super didReceiveMemoryWarning];

 22     // Dispose of any resources that can be recreated.

 23 }

 24 

 25 - (void)layoutUI {

 26     _currentSection = -1;

 27     _currentRow = -1;

 28     _mArrHeaderView = [[NSMutableArray alloc] initWithCapacity:kSectionCount];

 29     for (NSInteger i=0; i<kSectionCount; i++) {

 30         HeaderView *headerView = [[HeaderView alloc] initWithFrame:CGRectMake(0, 0, kWidthForHeaderView, kHeightForHeaderView)];

 31         headerView.delegate = self;

 32         [headerView.btnBack setTitle:[NSString stringWithFormat:@"第%ld组", (long)i] forState:UIControlStateNormal];

 33         headerView.section = i;

 34         [_mArrHeaderView addObject:headerView];

 35     }

 36     self.tableView.separatorInset = UIEdgeInsetsMake(0, 0, 0, 15.0); //设置单元格（上左下右）内边距

 37     

 38     self.navigationItem.title = @"为每行单元格设置展开子项";

 39 }

 40 

 41 #pragma mark - TableView

 42 //- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {

 43 //    return @"列表";

 44 //}

 45 

 46 - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {

 47     return _mArrHeaderView[section];

 48 }

 49 

 50 - (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {

 51     UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, kWidthForHeaderView, kHeightForFooterView)];

 52     view.backgroundColor = [UIColor grayColor];

 53     return view;

 54 }

 55 

 56 - (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {

 57     return kHeightForHeaderView;

 58 }

 59 

 60 - (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {

 61     return kHeightForFooterView;

 62 }

 63 

 64 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {

 65     HeaderView *headerView = _mArrHeaderView[indexPath.section];

 66     return headerView.isOpen ? 35.0 : 0;

 67 }

 68 

 69 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

 70     return kSectionCount;

 71 }

 72 

 73 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

 74     HeaderView *headerView = _mArrHeaderView[section];

 75     return headerView.isOpen ? kRowCount : 0;

 76 }

 77 

 78 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

 79     static NSString *cellIdentifier = @"cellIdentifier";

 80     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];

 81     if (!cell) {

 82         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];

 83     }

 84     cell.textLabel.text = [NSString stringWithFormat:@"%ld-%ld",(long)indexPath.section,(long)indexPath.row];

 85     return cell;

 86 }

 87 

 88 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

 89     _currentSection = indexPath.section;

 90     _currentRow = indexPath.row;

 91     [tableView reloadData];

 92 }

 93 

 94 #pragma mark - HeaderViewDelegate

 95 - (void)selectedWith:(HeaderView *)view {

 96     UIImage *img = nil;

 97     if (view.section == _currentSection) {

 98         //点击的HeaderView如果是当前已选中的HeaderView时，就进行本身收缩和展开切换

 99         view.isOpen = !view.isOpen;

100         img = [UIImage imageNamed:(view.isOpen ? @"LineIsOpen" : @"LineNormal")];

101         [view.btnBack setBackgroundImage:img forState:UIControlStateNormal];

102     } else {

103         //点击的HeaderView如果不是当前已选中的HeaderView时，就进行先收缩全部的HeaderView，再展开它

104         for (HeaderView *headerView in _mArrHeaderView) {

105             headerView.isOpen = NO;

106             img = [UIImage imageNamed:@"LineNormal"];

107             [headerView.btnBack setBackgroundImage:img forState:UIControlStateNormal];

108             

109         }

110         view.isOpen = YES;

111         img = [UIImage imageNamed:@"LineIsOpen"];

112         [view.btnBack setBackgroundImage:img forState:UIControlStateNormal];

113     }

114     [self.tableView reloadData];

115     

116     _currentSection = view.section;

117 }

118 

119 @end

HeaderViewDelegate.h

1 @class HeaderView;

2 

3 @protocol HeaderViewDelegate <NSObject>

4 - (void)selectedWith:(HeaderView *)view;

5 

6 @end

HeaderView.h

 1 #import <UIKit/UIKit.h>

 2 #import "HeaderViewDelegate.h"

 3 

 4 @interface HeaderView : UIView

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

 6 @property (strong, nonatomic) UIButton *btnBack;

 7 @property (assign, nonatomic) NSInteger section;

 8 @property (assign, nonatomic) BOOL isOpen;

 9 

10 @end

HeaderView.m

 1 #import "HeaderView.h"

 2 

 3 @implementation HeaderView

 4 

 5 - (id)initWithFrame:(CGRect)frame {

 6     if (self = [super initWithFrame:frame]) {

 7         _isOpen = NO;

 8         UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];

 9         btn.frame = frame;

10         [btn setBackgroundImage:[UIImage imageNamed:@"LineNormal"]

11                        forState:UIControlStateNormal];

12         [btn setBackgroundImage:[UIImage imageNamed:@"LineHighlighted"]

13                        forState:UIControlStateHighlighted];

14         [btn addTarget:self

15                 action:@selector(execSelected)

16       forControlEvents:UIControlEventTouchUpInside];

17         [self addSubview:btn];

18         _btnBack = btn;

19     }

20     return self;

21 }

22 

23 - (void)execSelected {

24     if (_delegate && [_delegate respondsToSelector:@selector(selectedWith:)]) {

25         [_delegate selectedWith:self];

26     }

27 }

28 

29 @end

AppDelegate.h

1 #import <UIKit/UIKit.h>

2 

3 @interface AppDelegate : UIResponder <UIApplicationDelegate>

4 @property (strong, nonatomic) UIWindow *window;

5 @property (strong, nonatomic) UINavigationController *navigationController;

6 

7 @end

AppDelegate.m

 1 #import "AppDelegate.h"

 2 #import "ViewController.h"

 3 

 4 @interface AppDelegate ()

 5 @end

 6 

 7 @implementation AppDelegate

 8 

 9 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

10     _window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

11     ViewController *viewController = [[ViewController alloc] init];

12     _navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];

13     _window.rootViewController = _navigationController;

14     //[_window addSubview:_navigationController.view]; //当_window.rootViewController关联时，这一句可有可无

15     [_window makeKeyAndVisible];

16     return YES;

17 }

18 

19 - (void)applicationWillResignActive:(UIApplication *)application {

20 }

21 

22 - (void)applicationDidEnterBackground:(UIApplication *)application {

23 }

24 

25 - (void)applicationWillEnterForeground:(UIApplication *)application {

26 }

27 

28 - (void)applicationDidBecomeActive:(UIApplication *)application {

29 }

30 

31 - (void)applicationWillTerminate:(UIApplication *)application {

32 }

33 

34 @end