// 主要核心是点击自定义header来展开和收起每一组里面的cell,模型里面应该有isShow此属性来记录开展还是收起。
// ViewController.m
// 实现类似QQ的折叠效果
//
// Created by skg_Myfly on 16/3/3.
// Copyright © 2016年 skg_Myfly. All rights reserved.
//
#import "ViewController.h"
#import "QQCellModel.h"
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>
/** tableview */
@property (nonatomic , strong ) UITableView *tableView;
/** 全局数据源 */
@property (nonatomic , strong ) NSMutableArray *dateArray;
@end
@implementation ViewController
//懒加载
-(NSMutableArray *)dateArray{
if (!_dateArray) {
self.dateArray = [NSMutableArray array];
}
return _dateArray;
}
- (void)viewDidLoad {
[super viewDidLoad];
//添加数据
for (int i = \'A\'; i <= \'Z\'; i ++) {
QQCellModel* model = [[QQCellModel alloc] init];
model.name = [NSString stringWithFormat:@"%c",i];
// model.isShow = YES;
for (int j = 0; j < 10; j ++) {
[model.array addObject: [NSString stringWithFormat:@"%c - %d",i,j]];
}
[self.dateArray addObject:model];
}
//实例化表单
_tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height) style:UITableViewStyleGrouped];
_tableView.delegate = self;
_tableView.dataSource = self;
_tableView.rowHeight = 50;
[self.view addSubview:_tableView];
}
//合计多少组
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return [_dateArray count];
}
//每组里面含多少行
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
QQCellModel* model = [_dateArray objectAtIndex:section];
if (model.isShow) {
return model.array.count;
}else{
return 0;
}
}
//添加每行显示的内容
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString* ID = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID ];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];
}
QQCellModel* model = [_dateArray objectAtIndex:indexPath.section];
NSString* str = [[model array] objectAtIndex:indexPath.row];
cell.textLabel.text = str;
return cell;
}
// 定义头标题的视图，添加点击事件
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
QQCellModel* model = [_dateArray objectAtIndex:section];
UIButton* btn =[UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 50);
[btn setTitle:model.name forState:UIControlStateNormal];
btn.tag = section;
[btn addTarget:self action:@selector(btnClick:with:) forControlEvents:UIControlEventTouchUpInside];
if (section % 2) {
btn.backgroundColor = [UIColor darkGrayColor];
}else{
btn.backgroundColor = [UIColor lightGrayColor];
}
return btn;
}
//点击后事件相应
-(void)btnClick:(UIButton*)btn with:(NSInteger*)section{
QQCellModel* model = [_dateArray objectAtIndex:btn.tag];
if ([model isShow]) {
[model setIsShow:NO];
}else{
[model setIsShow:YES];
}
[_tableView reloadSections:[NSIndexSet indexSetWithIndex:btn.tag] withRowAnimation:UITableViewRowAnimationFade];
// [_tableView reloadRowsAtIndexPaths:<#(nonnull NSArray<NSIndexPath *> *)#> withRowAnimation:<#(UITableViewRowAnimation)#>]
}
@end
-------------------------------------------------------------------------------------------
//
// QQCellModel.h
// 实现类似QQ的折叠效果
//
// Created by skg_Myfly on 16/3/3.
// Copyright © 2016年 skg_Myfly. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface QQCellModel : NSObject
/**名字 */
@property (nonatomic ,copy ) NSString* name;
/**是否展开 */
@property (nonatomic , assign ) BOOL isShow;
/** 每组的数据 */
@property (nonatomic , strong ) NSMutableArray *array;
@end
