ios多视图之间实现省市级的二级查找

为大家分享一下在ios中多视图实现省市级的查找，例如在上一个页面中点了“北京市”，会调到下一个页面显示“朝阳区，东城区，西城区”等。

首先新建一个工程，工程名自定，然后在创建两个视图FirstTableViewController和SecondTableViewController继承于UITableViewController

1.把省市表的 plist 文件导入到工程里面。

2.在AppDelegate.h文件里导入头文件FirstTableViewController.h。

3.在AppDelegate.m文件中实现如下代码：

#import "AppDelegate.h"

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window.rootViewController=[[UINavigationController alloc] initWithRootViewController:[[FirstTableViewController alloc] initWithStyle:UITableViewStylePlain]];
    return YES;
}

4.FirstTableViewController.h中定义一个集合属性

#import <UIKit/UIKit.h>
#import "SecondTableViewController.h"
@interface FirstTableViewController : UITableViewController
@property(strong,nonatomic) NSArray *array;

@end

5.FirstTableViewController.h中实现如下代码

#import "FirstTableViewController.h"

@interface FirstTableViewController ()

@end

@implementation FirstTableViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title=@"省级";
    //设置导航栏的前景色
    self.navigationController.navigationBar.titleTextAttributes=@{NSForegroundColorAttributeName:[UIColor redColor]};
    UIBarButtonItem *item=[[UIBarButtonItem alloc] initWithTitle:@"下一页" style:2 target:self action:@selector(nextPage)];
    self.navigationItem.rightBarButtonItem=item;
    
    //读取文件
    NSString *path=[[NSBundle mainBundle]pathForResource:@"city" ofType:@"plist"];
    self.array=[NSArray arrayWithContentsOfFile:path];

     //重用单元格的唯一标示
    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"myCell"];
}
-(void)nextPage
{
    //跳转到下一页
    SecondTableViewController *secondVc=[SecondTableViewController new];
    [self.navigationController pushViewController:secondVc animated:YES];
    
}

- (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 self.array.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"myCell" forIndexPath:indexPath];
    
    NSDictionary *tempDic=self.array[indexPath.row];
    cell.textLabel.text=tempDic[@"State"];
    cell.accessoryType=1;
    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

    
    SecondTableViewController *secondVc=[SecondTableViewController new];
    [self.navigationController pushViewController:secondVc animated:YES];
    
    secondVc.num=(int)indexPath.row;
    secondVc.arrCity=self.array;
    
    
    NSLog(@"%@",self.array[indexPath.row][@"State"]);
}
-(void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"%ld",indexPath.row);
}

6.SecondTableViewController.h文件中定义几个属性

#import <UIKit/UIKit.h>

@interface SecondTableViewController : UITableViewController
@property(strong,nonatomic)NSArray *arrCity;//用于接受上个页面传来的值
@property(strong,nonatomic)NSMutableArray *array;
@property(assign,nonatomic)int num;
@end

7.SecondTableViewController.m文件中实现如下代码

#import "SecondTableViewController.h"

@interface SecondTableViewController ()

@end

@implementation SecondTableViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title=@"市级";
    self.array=[NSMutableArray array];
    for (NSDictionary *dic in self.arrCity[self.num][@"Cities"]) {
        [self.array addObject:dic[@"city"]];
    }
    
    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"myCell"];
    
}

- (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 self.array.count;
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"myCell" forIndexPath:indexPath];
    
    cell.textLabel.text=self.array[indexPath.row];
    
    return cell;
}