UITableView(三)

#import "ViewController.h"
#import "CityList.h"
#import "FirstTableViewController.h"
@interface ViewController ()<UITableViewDataSource,UITableViewDelegate>
@property(nonatomic,strong)  UITableView *tableView ;
/**
 *  设置存储城市对象的字典
 */
@property(nonatomic,strong)NSMutableDictionary *allCityDic;
@property(nonatomic,strong)NSMutableArray *keysArray;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    //创建表视图
    UITableView *tableView = [[UITableView alloc] initWithFrame:[UIScreen mainScreen].bounds style:UITableViewStylePlain];
    tableView.dataSource = self;
    tableView.delegate = self;
    [self.view addSubview:tableView];
    self.tableView = tableView;
    //读取plist中的数据
    [self readPlist];
    
//  [self.tableView setEditing:YES animated:YES];
    
    //添加编辑按钮
    self.navigationItem.rightBarButtonItem = self.editButtonItem;

}
#pragma mark - tableView的编辑,删除,添加,移动
//1.判断编辑状态是否打开
-(void)setEditing:(BOOL)editing animated:(BOOL)animated
{
    [super setEditing:editing animated:animated];
    [self.tableView setEditing:editing animated:animated];
}
//2.确认是否能编辑
-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    return YES;
}
//3.设置编辑的样式
-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.section == 1) {
        return UITableViewCellEditingStyleInsert;
    }else{
        return UITableViewCellEditingStyleDelete;
    }
}
//4.提交编辑状态,处理相关的数据,再刷新UI
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
//    //判断相关的状态
    if (editingStyle == UITableViewCellEditingStyleDelete) {
             //删除的操作
    //①.先操作数据
    NSString * key = _keysArray[indexPath.section];
    NSMutableArray * array = _allCityDic[key];
    [array removeObjectAtIndex:indexPath.row];
    //②.再操作UI
    [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationRight];
    if (array.count == 0) {
        //①.先操作数据
        [_keysArray removeObject:key];
        [_allCityDic removeObjectForKey:key];
        //②.再操作UI
        NSIndexSet * indexSet = [NSIndexSet indexSetWithIndex:indexPath.section];
        [tableView deleteSections:indexSet withRowAnimation:UITableViewRowAnimationRight];
    }
    }else if (editingStyle == UITableViewCellEditingStyleInsert){
        NSString * key = _keysArray[indexPath.section];
        NSMutableArray * array = _allCityDic[key];
        //创建数据
        CityList *city = [array objectAtIndex:indexPath.row];
        //创建数据
        [array insertObject:city atIndex:indexPath.row];
        //刷新数据方式之一:添加一行
        [self.tableView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationLeft];
    }
   
}
#pragma mark - 读取plist数据
-(void)readPlist
{
    //1.获取plist文件的路径
    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"CityList" ofType:@"plist"];
    //2.根据路径获取相应的数据
    NSDictionary *dic = [NSDictionary dictionaryWithContentsOfFile:filePath];
    //3.将字典中有用的数据进行拆解封装在Model类中
    //初始化接下来要使用的一个内容
    self.allCityDic = [NSMutableDictionary dictionary];
    self.keysArray = [NSMutableArray array];
    for (NSString *key in dic) {
        //此时取出来的数据是城市的相关信息
        NSArray *array = dic[key];
        //创建一个临时数组
        NSMutableArray *cityArr = [NSMutableArray array];
        //此时数组遍历出来的数据为字典类型
        
        for (NSDictionary *dictionary in array) {
            //将拆分的数据放在model类中
            //创建model类
            CityList *cityModel = [[CityList alloc] init];
            //使用KVC进行赋值
            [cityModel setValuesForKeysWithDictionary:dictionary];
            [cityArr addObject:cityModel];
        }
        //给字典进行赋值
        [self.allCityDic setObject:cityArr forKey:key];
        //给存放key的一个数组赋值
        [self.keysArray addObject:key];
    }
    
}
#pragma mark - tableView的代理方法
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    
    return self.keysArray.count;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    //对应城市各个区的个数
    NSString *key = self.keysArray[section];
    NSArray *array = [self.allCityDic objectForKey:key];
    return array.count;

}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"reusableCell"];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"reusableCell"];
    }
    NSString *key =self.keysArray[indexPath.section];
    NSArray *array =[self.allCityDic objectForKey:key];
    CityList *city = array[indexPath.row];
    cell.textLabel.text = city.name;
    cell.detailTextLabel.text = city.population;
    //根据key值获取存储Vlaue的数组
    
    return cell;
}
-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    NSString *key =self.keysArray[section];
   // NSArray *array =[self.allCityDic objectForKey:key];
    return key;
}
-(NSArray<NSString *> *)sectionIndexTitlesForTableView:(UITableView *)tableView
{
#warning 非常重要
    //字典是一种无序的容器,通过字典取key是无序的,但是如果从存储key值得数组中取则是有序的,进行删减增加时,获取的必须是确定的,不能是无序的
    return self.keysArray;
}
//当某一行被选中的时候触发的时候可以执行的一些操作
//跳转到tableViewController
-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
    FirstTableViewController *firstTVC = [[FirstTableViewController alloc] init];
    [self.navigationController pushViewController:firstTVC animated:YES];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

上述代码引用了plist文件,

#import "FirstTableViewController.h"

@interface FirstTableViewController ()

@end

@implementation FirstTableViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    
    //自身已经添加了tableView
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
#warning Incomplete implementation, return the number of sections
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
#warning Incomplete implementation, return the number of rows
    return 10;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" ];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"cell"];
    }
    cell.textLabel.text = @"大白";
    // Configure the cell...
    
    return cell;
}

#import <Foundation/Foundation.h>
//设置Model类用于处理数据
@interface CityList : NSObject
@property(nonatomic,strong)NSString *name;
@property(nonatomic,strong)NSString *population;
@end