首先我们先写关于APPdelegate.m里面的
首先引入你的viewController
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
UINavigationController *naVC = [[UINavigationController alloc] initWithRootViewController:[[ViewController alloc] init]];
self.window.rootViewController = naVC;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
回到你的viewcontroller.h
创建一个UITableView,并且设置他的代理
以下是.h里面的内容
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>
@property(nonatomic,strong)UITableView *tableView;
@end
创建完tableView去 .m 文件中去实现
首先创建四个数组(在这里数组随意创建,最少两个,我个人创建了四个,因为分了三种),再加一个NSMutableDictionary
NSArray *rowArray;
NSArray *rowArray1;
NSArray *rowArray2;
NSArray *sectionArray;
NSMutableDictionary *showDic;//用来判断分组展开与收缩
好,我们去实现ViewDidLoad里面的东西
//设置tableview为全局
self.tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:(UITableViewStylePlain)];
//为tableView设置代理
self.tableView.dataSource = self;
self.tableView.delegate = self;
//添加tableView
[self.view addSubview:_tableView];
sectionArray = [NSArray arrayWithObjects:@"火影忍者",@"啦啦啦德玛西亚",@"七龙珠", nil];
rowArray = [NSArray arrayWithObjects:@"小伦",@"信爷",@"嘉文",@"蕾娜", nil];
rowArray1 = [NSArray arrayWithObjects:@"鸣人",@"佐助",@"宇智波鼬",@"蝎", nil];
rowArray2 = [NSArray arrayWithObjects:@"孙悟空",@"达尔",@"孙悟饭",@"特兰克斯", nil];
好了,写完这些后让我们去实现需要的各种方法吧
//定义section个数
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return sectionArray.count;
}
//每个section里面有多少cell
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return rowArray.count;
}
//实现cell
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
if(cell == NULL){
cell = [[UITableViewCell alloc] initWithStyle:(UITableViewCellStyleDefault) reuseIdentifier:@"cell"];
cell.selectionStyle = UITableViewRowAnimationNone;
cell.separatorInset = UIEdgeInsetsZero;
cell.clipsToBounds = YES;
}
if(indexPath.section == 0){
cell.textLabel.text = rowArray1[indexPath.row];
}else if (indexPath.section == 1){
cell.textLabel.text = rowArray[indexPath.row];
}else if (indexPath.section == 2){
cell.textLabel.text = rowArray2[indexPath.row];
}
cell.textLabel.font = [UIFont systemFontOfSize:14];
cell.textLabel.textColor = [UIColor redColor];
return cell;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if([showDic objectForKey:[NSString stringWithFormat:@"%ld",indexPath.section]]){
return 44;
}
return 0;
}
//section头部高度
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
return 40;
}
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
UIView *header = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
UILabel *sectionLabel = [[UILabel alloc] initWithFrame:CGRectMake(20, 5, 300, 20)];
sectionLabel.text = [NSString stringWithFormat:@"%@",sectionArray[section]];
sectionLabel.font = [UIFont systemFontOfSize:18];
sectionLabel.textColor = [UIColor blackColor];
[header addSubview:sectionLabel];
//单机 recognizer,收缩分组cell
header.tag = section;
UITapGestureRecognizer *singleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTap:)];
singleRecognizer.numberOfTapsRequired = 1;
[singleRecognizer setNumberOfTouchesRequired:1];
[header addGestureRecognizer:singleRecognizer];
return header;
}
-(void)singleTap:(UITapGestureRecognizer *)sender
{
NSInteger didSection = sender.view.tag;
if(!showDic){
showDic = [[NSMutableDictionary alloc] init];
}
NSString *key = [NSString stringWithFormat:@"%ld",didSection];
if(![showDic objectForKey:key]){
[showDic setObject:@"1" forKey:key];
}else{
[showDic removeObjectForKey:key];
}
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:didSection] withRowAnimation:(UITableViewRowAnimationFade)];
}
