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）

1 #import <UIKit/UIKit.h>
2 
3 @interface ViewController : UITableViewController
4 @property (strong, nonatomic) NSMutableArray *mArrDataSource;
5 
6 @end

  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

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

 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