增删改查

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@interface ViewController ()<UITableViewDelegate,UITableViewDataSource,UIAlertViewDelegate>
@property (nonatomic,strong) NSMutableArray *array;
@property (nonatomic,strong) UITableView *tableViews;
@property (nonatomic,strong) UIAlertView *alert;
@end

@implementation ViewController

• (void)viewDidLoad {
  [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
  [self.view setBackgroundColor:[UIColor whiteColor]];
  [self.view addSubview:self.tableViews];
  self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:@selector(edit)];
  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(add)];
  }

• (void)edit{
  if (self.tableViews.isEditing == NO) {
  self.tableViews.editing = YES;
  }else if (self.tableViews.isEditing == YES){
  self.tableViews.editing = NO;
  }
  }

• (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
  if (buttonIndex == 1) {
  UITextField *tf = [self.alert textFieldAtIndex:0];
  [self.array addObject:tf.text];
  [self.tableViews reloadData];
  }
  }

• (void)add{
  self.alert = [[UIAlertView alloc]initWithTitle:@"提示框" message:@"输入您的姓名" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确认", nil];
  self.alert.alertViewStyle = UIAlertViewStylePlainTextInput;
  [self.alert show];
  }

• (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
  return self.array.count;
  }

• (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
  [self.array removeObject:self.array[indexPath.row]];
  [self.tableViews reloadData];
  }

• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
  static NSString *tableIdentfier = @"table";
  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:tableIdentfier];
  if (!cell) {
  cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:tableIdentfier];
  }
  cell.textLabel.text = self.array[indexPath.row];
  return cell;
  }

• (NSMutableArray *)array{
  if (!_array) {
  _array = [[NSMutableArray alloc]initWithObjects:@"张三",@"李四",@"王五", nil];
  }
  return _array;
  }

• (UITableView *)tableViews{
  if (!_tableViews) {
  _tableViews = [[UITableView alloc]initWithFrame:self.view.bounds style:UITableViewStylePlain];
  [_tableViews setDelegate:self];
  [_tableViews setDataSource:self];
  }
  return _tableViews;
  }
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