项目中需要做一个类似于QQ通讯录的效果，即可展开和收缩的UITableView，主要是区模型通过一个标记参数进行UITableView的开合。
效果如下：
demo.gif
主控制器代码如下：
#import "ViewController.h"
#import "MySectionHeaderView.h"
#import "MyCell.h"
#import "MyClass.h"
#import "MyStudent.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UITableView *tableView;
@property (strong, nonatomic) NSArray *datas;
@property (strong, nonatomic) NSMutableArray *classes;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self.tableView registerNib:[UINib nibWithNibName:@"MyCell" bundle:nil] forCellReuseIdentifier:@"MyCellID"];
[self.tableView registerNib:[UINib nibWithNibName:@"MySectionHeaderView" bundle:nil] forHeaderFooterViewReuseIdentifier:@"MySectionHeaderViewID"];
self.tableView.tableFooterView = [UIView new];
self.classes = [NSMutableArray array];
self.datas = @[ @{@"className" : @"Aitna",
@"students" : @[@{@"name" : @"Y.X.M."},
@{@"name" : @"Leif"},
@{@"name" : @"Lennon"},
@{@"name" : @"Lambert"},
@{@"name" : @"Jerome"},
@{@"name" : @"Isidore"}]},
@{@"className" : @"Melete",
@"students" : @[@{@"name" : @"Merle"},
@{@"name" : @"Paddy"},
@{@"name" : @"Perry"},
@{@"name" : @"Philip"}]},
@{@"className" : @"Aoede",
@"students" : @[@{@"name" : @"Verne"},
@{@"name" : @"Vincent"},
@{@"name" : @"Walter"},
@{@"name" : @"Zachary"}]},
@{@"className" : @"Dione",
@"students" : @[@{@"name" : @"Timothy"},
@{@"name" : @"Roderick"},
@{@"name" : @"Quentin"},
@{@"name" : @"Paddy"}]},
@{@"className" : @"Adanos",
@"students" : @[@{@"name" : @"Mortimer"},
@{@"name" : @"Michael"},
@{@"name" : @"Kevin"},
@{@"name" : @"Jeremy"}]}];
/** 处理数据，得到所有班级 */
for (NSDictionary *class in self.datas) {
MyClass *new_class = [MyClass new];
new_class.class_name = class[@"className"];
NSArray *students = class[@"students"];
NSMutableArray *new_students = [NSMutableArray array];
for (NSDictionary *student in students) {
MyStudent *new_student = [MyStudent new];
new_student.student_name = student[@"name"];
[new_students addObject:new_student];
}
new_class.students = new_students;
[self.classes addObject:new_class];
}
}
#pragma mark - UITableViewDelegate DataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return self.classes.count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
MyClass *class = self.classes[section];
return class.open ? class.students.count : 0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
MyCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MyCellID" forIndexPath:indexPath];
MyClass *class = self.classes[indexPath.section];
cell.student = class.students[indexPath.row];
return cell;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
MySectionHeaderView *header = [tableView dequeueReusableHeaderFooterViewWithIdentifier:@"MySectionHeaderViewID"];
MyClass *class = self.classes[section];
header.class_model = class;
header.headViewClick = ^(MyClass *class_model) {
/** 根据open参数进行tableView的开合*/
if (class.open) {
NSMutableArray *indexPaths = [NSMutableArray array];
for (int i = 0; i < class.students.count; i++) {
[indexPaths addObject:[NSIndexPath indexPathForRow:i inSection:section]];
}
[self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
}else{
NSMutableArray *indexPaths = [NSMutableArray array];
for (int i = 0; i < class.students.count; i++) {
[indexPaths addObject:[NSIndexPath indexPathForRow:i inSection:section]];
}
[self.tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
}
};
return header;
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
return 50;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
