123批量添加和删除单元格（扩展知识：设置单元格的尺寸和颜色）

效果如下：

ViewController.h

1 #import <UIKit/UIKit.h>

2 

3 @interface ViewController : UITableViewController

4 @property (strong, nonatomic) NSMutableArray *mArrDataSource;

5 

6 @end

ViewController.m

  1 #import "ViewController.h"

  2 

  3 @interface ViewController ()

  4 - (void)layoutUI;

  5 - (void)tableViewSetting;

  6 - (void)insertAll:(UIBarButtonItem *)sender;

  7 - (void)deleteAll:(UIBarButtonItem *)sender;

  8 @end

  9 

 10 @implementation ViewController

 11 

 12 - (void)viewDidLoad {

 13     [super viewDidLoad];

 14     

 15     [self layoutUI];

 16 }

 17 

 18 - (void)didReceiveMemoryWarning {

 19     [super didReceiveMemoryWarning];

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

 21 }

 22 

 23 - (void)layoutUI {

 24     _mArrDataSource = [[NSMutableArray alloc] initWithObjects:@"A", @"B", @"C", @"D", nil];

 25     

 26     self.navigationItem.title = @"批量添加和删除单元格";

 27     UIBarButtonItem *barBtnInsertAll = [[UIBarButtonItem alloc] initWithTitle:@"添加全部"

 28                                                                         style:UIBarButtonItemStyleDone

 29                                                                        target:self

 30                                                                        action:@selector(insertAll:)];

 31     self.navigationItem.leftBarButtonItem = barBtnInsertAll;

 32     self.navigationItem.leftBarButtonItem.enabled = NO;

 33     

 34     UIBarButtonItem *barBtnDeleteAll = [[UIBarButtonItem alloc] initWithTitle:@"删除全部"

 35                                                                         style:UIBarButtonItemStyleDone

 36                                                                        target:self

 37                                                                        action:@selector(deleteAll:)];

 38     self.navigationItem.rightBarButtonItem = barBtnDeleteAll;

 39     

 40     [self tableViewSetting];

 41 }

 42 

 43 - (void)tableViewSetting {

 44     self.tableView.backgroundColor = [UIColor colorWithRed:0.962 green:0.991 blue:1.000 alpha:1.000]; //设置表格背景色

 45     self.tableView.rowHeight = 50; //设置单元格高度

 46     self.tableView.separatorColor = [UIColor redColor]; //设置单元格分割线；默认是gray灰色

 47     self.tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine; //设置单元格分割线样式；默认是UITableViewCellSeparatorStyleSingleLine

 48     self.tableView.separatorInset = UIEdgeInsetsMake(5.0, 20.0, 5.0, 20.0); //设置单元格（上左下右）内边距

 49 }

 50 

 51 - (void)insertAll:(UIBarButtonItem *)sender {

 52     //添加全部数据源数据

 53     _mArrDataSource = [[NSMutableArray alloc] initWithArray:@[@"A", @"B", @"C", @"D"]];

 54     //添加全部单元格

 55     NSUInteger len = _mArrDataSource.count;

 56     NSMutableArray *mArrIndexPath = [[NSMutableArray alloc] initWithCapacity:len];

 57     for (NSUInteger i=0; i<len; i++) {

 58         [mArrIndexPath addObject:[NSIndexPath indexPathForRow:i inSection:0]];

 59     }

 60     [self.tableView insertRowsAtIndexPaths:mArrIndexPath

 61                           withRowAnimation:UITableViewRowAnimationAutomatic];

 62     

 63     self.navigationItem.rightBarButtonItem.enabled = YES;

 64     sender.enabled = NO;

 65 }

 66 

 67 - (void)deleteAll:(UIBarButtonItem *)sender {

 68     NSUInteger len = _mArrDataSource.count;

 69     NSMutableArray *mArrIndexPath = [[NSMutableArray alloc] initWithCapacity:len];

 70     for (NSUInteger i=0; i<len; i++) {

 71         [mArrIndexPath addObject:[NSIndexPath indexPathForRow:i inSection:0]];

 72     }

 73     //删除全部数据源数据

 74     [_mArrDataSource removeAllObjects];

 75     //删除全部单元格

 76     [self.tableView deleteRowsAtIndexPaths:mArrIndexPath

 77                           withRowAnimation:UITableViewRowAnimationAutomatic];

 78     

 79     self.navigationItem.leftBarButtonItem.enabled = YES;

 80     sender.enabled = NO;

 81 }

 82 

 83 #pragma mark - TableView

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

 85     return @"列表";

 86 }

 87 

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

 89     return 1;

 90 }

 91 

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

 93     return _mArrDataSource.count;

 94 }

 95 

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

 97     static NSString *cellIdentifier = @"cellIdentifier";

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

 99     if (!cell) {

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

101     }

102     cell.textLabel.text = _mArrDataSource[indexPath.row];

103     cell.textLabel.textColor = [UIColor blackColor];

104     cell.textLabel.textAlignment = NSTextAlignmentCenter;

105     cell.textLabel.font = [UIFont systemFontOfSize:22.0];

106     

107     cell.backgroundColor = [UIColor performSelector:NSSelectorFromString(indexPath.row % 2 == 0 ? @"grayColor" : @"lightGrayColor")];

108     return cell;

109 }

110 

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

112     

113 }

114 

115 @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