ios5开发UITableView开启编辑功能

该例子添加UITableView编辑功能

具体功能如下

 

功能很简单但很实用 

 @implementation AppDelegate

@synthesize window = _window;
@synthesize viewController = _viewController;
@synthesize navigationController=_navigationController;
@synthesize array=_array;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.array=[[NSMutableArray alloc] init];
    City *city1=[[City alloc] init];
    city1.name=@"KunShan";
    city1.description=@"Kunshan City,Jiangsu Province China.";
    City *city2=[[City alloc] init];
    city2.name=@"Shanghai";
    city2.description=@"Shanghai City, China.";
    City *city3=[[City alloc] init];
    city3.name=@"New York";
    city3.description=@"the largest city in New York State and in the United States; located in southeastern New York at the mouth of the Hudson river; a major financial and cultural center";
    City *city4=[[City alloc] init];
    city4.name=@"Tokyo";
    city4.description=@"the capital and largest city of Japan; the economic and cultural center of Japan";
    [self.array addObject:city1];
    [self.array addObject:city2];
    [self.array addObject:city3];
    [self.array addObject:city4];
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
    self.navigationController=[[UINavigationController alloc] initWithRootViewController:self.viewController];
    
    self.window.rootViewController = self.navigationController;
    [self.window makeKeyAndVisible];
    return YES;
}

 利用appDelegate定义一个nsmutablearrary数据源;应为appDelegate就是一个单例

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title=@"City Guide";
    self.navigationItem.rightBarButtonItem=self.editButtonItem;
    self.tableView.allowsSelectionDuringEditing=YES;
    //self.navigationItem.rightBarButtonItem=[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemEdit target:self action:@selector(editTableView)];
    
    AppDelegate *app=(AppDelegate *)[[UIApplication sharedApplication] delegate];
    array=app.array;
    
    // Do any additional setup after loading the view, typically from a nib.

} 

 获取数据源

#pragma mark -uitableviewdelegate
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}
-(NSInteger)tableView:(UITableView *)tv numberOfRowsInSection:(NSInteger)section{
    if ([tv isEditing]) {
        return [array count]+1;
    }else {
         return [array count];
    }
   
}
- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell=[tv dequeueReusableCellWithIdentifier:CellIdentifier];
    if (!cell) {
        cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];  
    }
    cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
    // Configure the cell...
    if (indexPath.row<array.count) {
        
    
    City *thisCity=[array objectAtIndex:indexPath.row];
    cell.textLabel.text=thisCity.name;
    }
    else {
        cell.textLabel.text=@"Add City";
        cell.textLabel.textColor=[UIColor lightGrayColor];
        cell.editingAccessoryType=UITableViewCellAccessoryDetailDisclosureButton;
        
        
    }
    return cell;
}

-(void)tableView:(UITableView *)tv didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    if (indexPath.row< [array count] && !self.editing
        ) {
        //view city detail
        CityViewController *cityViewController=[[CityViewController alloc] initWithIndexPath:indexPath];
        [self.navigationController pushViewController:cityViewController animated:YES];
    }
    if (indexPath.row== [array count] && self.editing) {
        //add city
    }
    [tv deselectRowAtIndexPath:indexPath animated:YES];
}
-(void) tableView:(UITableView *)tv commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{
    if (editingStyle==UITableViewCellEditingStyleDelete) {
        [array removeObjectAtIndex:indexPath.row];
        [tv deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]withRowAnimation:UITableViewRowAnimationLeft];
    }
}
-(UITableViewCellEditingStyle )tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{
    if (indexPath.row<[array count]) {
        return UITableViewCellEditingStyleDelete;
    }else {
        return UITableViewCellEditingStyleInsert;
    }
    
}
-(void)setEditing:(BOOL)editing animated:(BOOL)animated{
    if (editing!=self.editing) {
        [super setEditing:editing animated:animated];
        [tableView setEditing:editing animated:animated];
        NSMutableArray *indicies=[[NSMutableArray alloc] init];
        for (int i=0; i<[array count]; i++) {
            [indicies addObject:[NSIndexPath indexPathForRow:i inSection:0]];
        }
        NSArray *lastIndex=[NSArray arrayWithObject:[NSIndexPath indexPathForRow:array.count inSection:0]];
        if (editing==YES) {
            for (int i=0; i<array.count; i++) {
                UITableViewCell *cell=[tableView cellForRowAtIndexPath:[indicies objectAtIndex:i]];
                [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
            }
            [tableView insertRowsAtIndexPaths:lastIndex withRowAnimation:UITableViewRowAnimationRight];
            
             
        }else {
            for (int i=0; i<array.count; i++) {
                UITableViewCell * cell=[tableView cellForRowAtIndexPath:[indicies objectAtIndex:i]];
                [cell setSelectionStyle:UITableViewCellSelectionStyleBlue];
            }
            [tableView deleteRowsAtIndexPaths:lastIndex withRowAnimation:UITableViewRowAnimationLeft];
        }
    }

}