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
posted @ 2012-07-23 13:52  yingkong1987  阅读(3034)  评论(0)  编辑  收藏  举报