|
请问分组的UITableView的多层点击展开怎么实现？最近要做个百度离线地图分省市的下载，类似于百度地图的那种，始终做不到一样的效果，谢谢！ |
|
|
这个效果还是比较好做的，关键在于你的数据源的结构上，假设你有这样一个 Model：
@interface Province : NSObject @property … NSString *name; @property … NSArray *cities; @property … BOOL isOpen; @end name用来存显示名称，cities 用来存展开后的数组，isOpen 标识当前是否是打开的状态。 |
|
|
你好，如果用这个方法的话就不能用titleForHeaderInSection方法了，请问有没有相关的Demo，谢谢！ |
|
|
– (void)insertRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation 方法添加或删除 rows这个方法怎么用的呢？ |
|
| 40分 |
titleForHeaderInSection这个方法还是可以用的，我现写了一个 Demo 给你，你再尝试一下：
@interface Area : NSObject
@property (nonatomic, copy) NSString *name;
@property (nonatomic, copy) NSArray *cities;
@property (nonatomic, assign) BOOL isOpen;
@end
@implementation Area
@end
@interface MasterViewController ()
@property NSMutableArray *objects;
@end
@implementation MasterViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.navigationItem.leftBarButtonItem = self.editButtonItem;
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Province"];
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"City"];
self.objects = [[NSMutableArray alloc] init];
Area *province = [Area new];
province.name = @"福建";
Area *city1 = [Area new];
city1.name = @"福州";
Area *city2 = [Area new];
city2.name = @"厦门";
Area *city3 = [Area new];
city3.name = @"泉州";
Area *city4 = [Area new];
city4.name = @"莆田";
province.cities = @[city1, city2, city3, city4];
[self.objects insertObject:province atIndex:0];
}
#pragma mark - Table View
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.objects.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell;
Area *area = self.objects[indexPath.row];
if (area.cities.count > 0) {
cell = [tableView dequeueReusableCellWithIdentifier:@"Province" forIndexPath:indexPath];
} else {
cell = [tableView dequeueReusableCellWithIdentifier:@"City" forIndexPath:indexPath];
}
area = self.objects[indexPath.row];
cell.textLabel.text = [area name];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
Area *area = self.objects[indexPath.row];
if ([cell.reuseIdentifier isEqualToString:@"Province"]) {
NSMutableArray *indexPaths = [NSMutableArray arrayWithCapacity:area.cities.count];
for (NSInteger i = 1; i <= area.cities.count; i++) {
[indexPaths addObject:[NSIndexPath indexPathForRow:indexPath.row + i inSection:indexPath.section]];
}
if (area.isOpen) {
[self.objects removeObjectsInArray:area.cities];
[tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationAutomatic];
} else {
[self.objects addObjectsFromArray:area.cities];
[tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationAutomatic];
}
area.isOpen = !area.isOpen;
} else if ([cell.reuseIdentifier isEqualToString:@"City"]) {
[[[UIAlertView alloc] initWithTitle:@"提示" message:area.name delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil] show];
}
}
@end
逻辑基本就是这样了。 |
|
你好 谢谢你！你的Demo可以用 但是当你的数据源增加到3组或更多时就会有问题了
 这是因为- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell;函数的问题吧 |
|
|
你好 谢谢你！你的Demo可以用 但是当你的数据源增加到3组或更多时就会有问题了 |
|
|
3组应该也没问题，Area Model的这种结构是采用的组合模式，N 层都可以: Area *province = [Area new]; province.name = @"福建"; Area *city1 = [Area new]; city1.name = @"福州"; Area *city2 = [Area new]; city2.name = @"厦门"; Area *city3 = [Area new]; city3.name = @"泉州"; Area *city4 = [Area new]; city4.name = @"莆田"; Area *city11 = [Area new]; city11.name = @"北京"; Area *city12 = [Area new]; city12.name = @"上海"; city1.cities = @[city11, city12]; province.cities = @[city1, city2, city3, city4]; [self.objects insertObject:province atIndex:0]; 关键是 insert、delete 一定要和数据源同步。 |
|
CodeBye 版权所有丨如未注明 , 均为原创丨本网站采用BY-NC-SA协议进行授权 , 转载请注明UITableView的多层点击展开！
