IOS 模拟QQ分组折叠

#define USER_KEY @"users"

#define GROUPNAME_KEY @"groupName"

@interfaceViewController ()<UITableViewDataSource,UITableViewDelegate>

 {

    UITableView *_tableView;

    NSMutableArray *_dataSource;

    BOOL expanded;

}

- (void)initializeDataSource;

- (void)initializeUserInterface;

- (void)buttonPressed:(UIButton *)sender;

- (BOOL)isExpanded:(int)section;

- (void)cellapseOrExpand:(int)section;

@end

@implementation ViewController

- (void)dealloc

{

    [_tableViewrelease];

    [_dataSourcerelease];

    [super dealloc];

}

- (void)viewDidLoad

{

    [superviewDidLoad];

// Do any additional setup after loading the view.

    [selfinitializeDataSource];

    [selfinitializeUserInterface];

}

- (void)initializeDataSource

{

    _dataSource = [[NSMutableArrayarray] retain];

    NSMutableDictionary *dict = [[NSMutableDictionaryalloc] init];

    [dict setObject:@"Friend" forKey:GROUPNAME_KEY];

    NSMutableArray *arr = [[NSMutableArrayalloc] init];

    [arr addObject: @"Amanda"];

    [arr addObject: @"Cecil"];

    [arr addObject: @"Martin"];

    [dict setObject:arr forKey:USER_KEY];

    [arr release];

    [_dataSource addObject:dict];

    [dict release];

    NSMutableDictionary *diction = [[NSMutableDictionaryalloc]init];

    [diction setObject:@"WorkmMate" forKey:GROUPNAME_KEY];

    NSMutableArray *array = [[NSMutableArrayalloc] init];

    [array addObject: @"Eartha"];

    [array addObject: @"Deirdre"];

    [array addObject: @"Montague"];

    [array addObject:@"Ken"];

    [diction setObject:array forKey:USER_KEY];

    [array release];

    [_dataSource addObject:diction];

    [diction release];

}

- (void)initializeUserInterface

{

    self.view.backgroundColor = [UIColorwhiteColor];

    _tableView = [[UITableViewalloc]initWithFrame:self.view.boundsstyle:UITableViewStylePlain];

    _tableView.delegate = self;

    _tableView.dataSource = self;

    [self.viewaddSubview:_tableView];

    [_tableViewrelease];

    [_tableViewreloadData];

}

- (void)cellapseOrExpand:(int)section

{

    expanded = NO;

    NSMutableDictionary *data = [_dataSourceobjectAtIndex:section];

    if ([data objectForKey:@"expanded"] != nil)

    {

        expanded = [[data objectForKey:@"expanded" ] boolValue];

    }

    [data setObject:[NSNumbernumberWithBool:!expanded] forKey:@"expanded"];

}

- (BOOL)isExpanded:(int)section

{

    expanded = NO;

    NSMutableDictionary *data = [_dataSourceobjectAtIndex:section];

    if ([data objectForKey:@"expanded"] != nil)

    {

        expanded = [[data objectForKey:@"expanded" ] intValue];

    }

    returnexpanded;

}

#pragma make - <UITableViewDelegate>

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section

{

    return 40;

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

    return [_dataSourcecount];

}

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

{

    //当前为折叠

    if (![self isExpanded:section])

    {

        return 0;

    }

    // 返回当前节点的数据

    NSDictionary *data = [_dataSource objectAtIndex:section];

    return [[data objectForKey:USER_KEY]count];

}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section

{

    UIView *heighView = [[UIViewalloc]initWithFrame:CGRectMake(0, 0, 320, 30)];

    heighView.backgroundColor = [UIColorcolorWithPatternImage:[UIImageimageNamed:@"line.png" ]];

    UILabel *label = [[UILabelalloc]init];

    label.bounds = CGRectMake(0, 0, 150, 30);

    label.center = CGPointMake(120, 15);

    NSDictionary *data = [_dataSource objectAtIndex:section];

    label.text = [data objectForKey:GROUPNAME_KEY];

    label.textAlignment = NSTextAlignmentLeft;

    label.backgroundColor = [UIColorclearColor];

    [heighView addSubview:label];

    UIButton *button = [[UIButtonalloc]initWithFrame:CGRectMake(0, 0, 30, 30)];

    [button addTarget:selfaction:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];

    //保存结号，传递方法

    button.tag = section;

    //是否展开，切换按钮显示图片

    if ([self isExpanded:section])

    {

        [button setImage:[UIImageimageNamed:@"btn_down"] forState:UIControlStateNormal];

    }

    else

    {

        [button setImage:[UIImageimageNamed:@"btn_right"] forState:UIControlStateNormal];

    }

    [heighView addSubview:button];

    [button release];

    return heighView;

}

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

{

    static NSString *cellIndentifer = @"cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIndentifer];

    if (!cell)

    {

        cell = [[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:  cellIndentifer]autorelease];

    }

    NSDictionary *data = (NSDictionary *)[_dataSourceobjectAtIndex:indexPath.section];

    NSArray *personName = (NSArray *)[data objectForKey:USER_KEY];

    if (personName == nil)

    {

        return cell;

    }

    cell.selectionStyle = UITableViewCellSelectionStyleGray;

    cell.textLabel.text = [personName objectAtIndex:indexPath.row];

    return cell;

}

- (void)buttonPressed:(UIButton *)sender

{

    [self cellapseOrExpand:sender.tag];

    [_tableViewreloadData];

}

@end

IOS 模拟QQ分组折叠,,5-wow.com