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;

#import "ViewController.h"
#define NAVIGATION_HEIGHT 44

@interface ViewController (private)
- (void)initTableView;
- (void)initDataArray;
- (void)initNavigationBarButton;
- (void)addOneCell:(id)sender;
- (void)removeOneCell:(id)sender;
@end

@implementation ViewController
@synthesize myTableView,myDataArr;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    [self initNavigationBarButton];
    [self initDataArray];
    [self initTableView];
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

#pragma mark - Initialize Method
- (void)initTableView
{
    UITableView *_tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height - NAVIGATION_HEIGHT) style:UITableViewStylePlain];
    _tableView.delegate = self;
    _tableView.dataSource = self;
    UIView *footerView = [[UIView alloc] init];
    [_tableView setTableFooterView:footerView];
    [footerView release];
    self.myTableView = _tableView;
    [_tableView release];
    
    [self.view addSubview:self.myTableView];
}

- (void)initDataArray
{
    NSMutableArray *_tempArr = [NSMutableArray arrayWithCapacity:0];
    for (int a = 0; a < 10; a++) {
        NSString *str = [NSString stringWithFormat:@"num:%d",a];
        [_tempArr addObject:str];
    }
    self.myDataArr = _tempArr;
}

- (void)initNavigationBarButton
{
    UIBarButtonItem *_addBarButton = [[UIBarButtonItem alloc] initWithTitle:@"add" style:UIBarButtonItemStylePlain target:self action:@selector(addOneCell:)];
    self.navigationItem.leftBarButtonItem = _addBarButton;
    [_addBarButton release];
    
    UIBarButtonItem *_removeBarButton = [[UIBarButtonItem alloc] initWithTitle:@"remove" style:UIBarButtonItemStylePlain target:self action:@selector(removeOneCell:)];
    self.navigationItem.rightBarButtonItem = _removeBarButton;
    [_removeBarButton release];
}

#pragma mark - TableView Delegate
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return [self.myDataArr count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *reuseID = @"Animation insert";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseID];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseID];
    }
    cell.textLabel.text = [self.myDataArr objectAtIndex:indexPath.row];
    return cell;
}

#pragma mark - ButtonClick Method
- (void)addOneCell:(id)sender
{
    [self.myTableView beginUpdates];
    [self.myDataArr insertObject:@"new" atIndex:0];
    NSArray *_tempIndexPathArr = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]];
    [self.myTableView insertRowsAtIndexPaths:_tempIndexPathArr withRowAnimation:UITableViewRowAnimationNone];
    [self.myTableView endUpdates];
}

- (void)removeOneCell:(id)sender
{
    [self.myTableView beginUpdates];
    [self.myDataArr removeObjectAtIndex:0];
    NSArray *_tempIndexPathArr = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:0 inSection:0]];
    [self.myTableView deleteRowsAtIndexPaths:_tempIndexPathArr withRowAnimation:UITableViewRowAnimationFade];
    [self.myTableView endUpdates];
}

#pragma mark - Dealloc
- (void)dealloc
{
    self.myTableView = nil;
    self.myDataArr = nil;
    [super dealloc];
}

@end