TableView动态的删除,添加cell

刚有人问我,tableview的数据源更新的时候能否动画更新cell,reload刷新会有闪屏现象..答案是肯定的.

所以中午花了几分钟写了一个demo,无法上传工程.贴出代码...其实很简单...关键的就是下面两个方法的实现

 16 - (void)addOneCell:(id)sender;

 17 - (void)removeOneCell:(id)sender;

  9 #import "ViewController.h"

 10 #define NAVIGATION_HEIGHT 44

 11 

 12 @interface ViewController (private)

 13 - (void)initTableView;

 14 - (void)initDataArray;

 15 - (void)initNavigationBarButton;

 16 - (void)addOneCell:(id)sender;

 17 - (void)removeOneCell:(id)sender;

 18 @end

 19 

 20 @implementation ViewController

 21 @synthesize myTableView,myDataArr;

 22 

 23 - (void)viewDidLoad

 24 {

 25     [super viewDidLoad];

 26     // Do any additional setup after loading the view, typically from a nib.

 27     [self initNavigationBarButton];

 28     [self initDataArray];

 29     [self initTableView];

 30 }

 31 

 32 - (void)viewDidUnload

 33 {

 34     [super viewDidUnload];

 35     // Release any retained subviews of the main view.

 36 }

 37 

 38 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation

 39 {

 40     return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);

 41 }

 42 

 43 #pragma mark - Initialize Method

 44 - (void)initTableView

 45 {

 46     UITableView *_tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - NAVIGATION_HEIGHT) style:UITableViewStylePlain];

 47     _tableView.delegate = self;

 48     _tableView.dataSource = self;

 49     UIView *footerView = [[UIView alloc] init];

 50     [_tableView setTableFooterView:footerView];

 51     [footerView release];

 52     self.myTableView = _tableView;

 53     [_tableView release];

 54     

 55     [self.view addSubview:self.myTableView];

 56 }

 57 

 58 - (void)initDataArray

 59 {

 60     NSMutableArray *_tempArr = [NSMutableArray arrayWithCapacity:0];

 61     for (int a = 0; a < 10; a++) {

 62         NSString *str = [NSString stringWithFormat:@"num:%d",a];

 63         [_tempArr addObject:str];

 64     }

 65     self.myDataArr = _tempArr;

 66 }

 67 

 68 - (void)initNavigationBarButton

 69 {

 70     UIBarButtonItem *_addBarButton = [[UIBarButtonItem alloc] initWithTitle:@"add" style:UIBarButtonItemStylePlain target:self action:@selector(addOneCell:)];

 71     self.navigationItem.leftBarButtonItem = _addBarButton;

 72     [_addBarButton release];

 73     

 74     UIBarButtonItem *_removeBarButton = [[UIBarButtonItem alloc] initWithTitle:@"remove" style:UIBarButtonItemStylePlain target:self action:@selector(removeOneCell:)];

 75     self.navigationItem.rightBarButtonItem = _removeBarButton;

 76     [_removeBarButton release];

 77 }

 78 

 79 #pragma mark - TableView Delegate

 80 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

 81 {

 82     return [self.myDataArr count];

 83 }

 84 

 85 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

 86 {

 87     static NSString *reuseID = @"Animation insert";

 88     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseID];

 89     if (cell == nil) {

 90         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseID];

 91     }

 92     cell.textLabel.text = [self.myDataArr objectAtIndex:indexPath.row];

 93     return cell;

 94 }

 95 

 96 #pragma mark - ButtonClick Method

 97 - (void)addOneCell:(id)sender

 98 {

 99     [self.myTableView beginUpdates];

100     [self.myDataArr insertObject:@"new" atIndex:0];

101     NSArray *_tempIndexPathArr = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]];

102     [self.myTableView insertRowsAtIndexPaths:_tempIndexPathArr withRowAnimation:UITableViewRowAnimationNone];

103     [self.myTableView endUpdates];

104 }

105 

106 - (void)removeOneCell:(id)sender

107 {

108     [self.myTableView beginUpdates];

109     [self.myDataArr removeObjectAtIndex:0];

110     NSArray *_tempIndexPathArr = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]];

111     [self.myTableView deleteRowsAtIndexPaths:_tempIndexPathArr withRowAnimation:UITableViewRowAnimationFade];

112     [self.myTableView endUpdates];

113 }

114 

115 #pragma mark - Dealloc

116 - (void)dealloc

117 {

118     self.myTableView = nil;

119     self.myDataArr = nil;

120     [super dealloc];

121 }

122 

123 @end