对于tableView 中单元格的收起/展开
git地址
思路:创建好tableView 后,把每一行单元格填充好对应的信息,在没有点击展开的情况下,tableView 的frame 还是显示的是第一个head单元格。当我们点击展开后,此时更改tableView 的frame 大小至能完全展示所有单元格的信息。
主要在于点击 展开/收起button 的事件响应函数去处理tableView 的整体高度
- (void)pressFoldButton:(UIButton*)button {
if (button.selected == YES) {
button.selected = NO;
_foldTableView.frame = CGRectMake(10, 100, 380, 50);
} else if (button.selected == NO) {
button.selected = YES;
_foldTableView.frame = CGRectMake(10, 100, 380, 50 * _foldArray.count);
}
}
上述代码中,在选中button 后,调整tableView 整体高度至能完全展示_foldArray 数组中所有元素。button 点击恢复时,tableView 的高度恢复至只显示一行单元格的高度
完整代码如下:
@property (nonatomic, strong) UITableView* foldTableView;
@property (nonatomic, strong) NSMutableArray* foldArray;
@property (nonatomic, strong) UIButton* foldButton;
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
_foldTableView = [[UITableView alloc] initWithFrame:CGRectMake(10, 100, 380, 50) style:UITableViewStylePlain];
_foldTableView.delegate = self;
_foldTableView.dataSource = self;
[self.view addSubview:_foldTableView];
[_foldTableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"normal"];
_foldArray = [NSMutableArray arrayWithObjects:@"内容1", @"内容2", @"内容3", @"内容4", @"内容5", @"内容6", @"内容7", nil];
_foldButton = [UIButton buttonWithType:UIButtonTypeCustom];
[_foldButton.layer setMasksToBounds:YES];
[_foldButton.layer setCornerRadius:15.0];
[_foldButton setTitle:@"点击展开" forState:UIControlStateNormal];
[_foldButton setTitle:@"点击收起" forState:UIControlStateSelected];
[_foldButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[_foldButton setTitleColor:[UIColor blackColor] forState:UIControlStateSelected];
_foldButton.backgroundColor = [UIColor yellowColor];
_foldButton.titleLabel.font = [UIFont systemFontOfSize:20];
[_foldButton addTarget:self action:@selector(pressFoldButton:) forControlEvents:UIControlEventTouchUpInside];
_foldButton.frame = CGRectMake(0, 0, 380, 50);
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return _foldArray.count;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return 50;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell* normalCell = [_foldTableView dequeueReusableCellWithIdentifier:@"normal" forIndexPath:indexPath];
[normalCell.layer setMasksToBounds:YES];
[normalCell.layer setCornerRadius:15.0];
if (indexPath.row == 0) {
[normalCell.contentView addSubview:_foldButton];
} else {
normalCell.textLabel.text = _foldArray[indexPath.row - 1];
normalCell.textLabel.textColor = [UIColor blackColor];
normalCell.textLabel.textAlignment = NSTextAlignmentCenter;
normalCell.textLabel.font = [UIFont systemFontOfSize:20];
normalCell.backgroundColor = [UIColor yellowColor];
}
return normalCell;
}
- (void)pressFoldButton:(UIButton*)button {
if (button.selected == YES) {
button.selected = NO;
_foldTableView.frame = CGRectMake(10, 100, 380, 50);
} else if (button.selected == NO) {
button.selected = YES;
_foldTableView.frame = CGRectMake(10, 100, 380, 50 * _foldArray.count);
}
}
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