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