ios开发——树形结构导航

树形结构导航=导航视图控制器+表视图

---

IB实现

1级视图

#import "ViewController.h"
#import "CitiesViewController.h"

@interface ViewController ()

@property (strong, nonatomic) NSDictionary *dictData;
@property (strong, nonatomic) NSArray *listData;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"provinces_cities" ofType:@"plist"];
    
    self.dictData = [[NSDictionary  alloc] initWithContentsOfFile:plistPath];
    self.listData = [self.dictData allKeys];
    self.title = @"省份信息";
}


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

#pragma mark --实现表视图数据源方法
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [self.listData count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    static NSString *cellIdentifier = @"CellIdentifier";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier forIndexPath:indexPath];
    
    NSInteger row = [indexPath row];
    cell.textLabel.text = self.listData[row];
    
    return cell;
}

#pragma mark --场景过渡之前的预处理
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    
    if([segue.identifier isEqualToString:@"ShowSelectedProvince"]) {
        
        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        NSInteger selectedIndex = indexPath.row;
        
        CitiesViewController *citiesViewController = segue.destinationViewController;
        NSString *selectName = self.listData[selectedIndex];
        citiesViewController.listData = self.dictData[selectName];
        citiesViewController.title = selectName;
        
    }
}


@end

二级视图

#import "CitiesViewController.h"
#import "DetailViewController.h"

@interface CitiesViewController ()
@property (weak, nonatomic) NSArray *listData;
@end

@implementation CitiesViewController

- (void)viewDidLoad {
    [super viewDidLoad];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
#pragma mark --实现表视图数据源方法
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return [self.listData count];
}


- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    
    static NSString *cellIdentifier = @"CellIdentifier";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier forIndexPath:indexPath];
    
    NSInteger row = [indexPath row];
    NSDictionary *dict = self.listData[row];
    
    cell.textLabel.text = dict[@"name"];
    
    return cell;
}

#pragma mark --选择表视图行时候触发
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    
    if([segue.identifier isEqualToString:@"ShowSelectedCity"]) {
        
        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        NSInteger selectedIndex = indexPath.row;
        
        NSDictionary *dict = self.listData[selectedIndex];
        
        DetailViewController *detailViewController = segue.destinationViewController;
        detailViewController.url = dict[@"url"];
        detailViewController.title = dict[@"name"];
    }
    
}

@end

三级视图

#import "DetailViewController.h"
#import <WebKit/WebKit.h>

@interface DetailViewController () <WKNavigationDelegate>

@property(nonatomic, strong) WKWebView* webView;
@property (weak, nonatomic) NSString *url;

@end

@implementation DetailViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    /// 添加WKWebView
    self.webView = [[WKWebView alloc] initWithFrame: self.view.frame];
    [self.view addSubview: self.webView];
    self.webView.navigationDelegate = self;
    
    NSURL * url = [NSURL URLWithString: self.url];
    NSURLRequest * request = [NSURLRequest requestWithURL:url];
    [self.webView loadRequest:request];
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

#pragma mark  --实现WKNavigationDelegate委托协议
//开始加载时调用
-(void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation {
    NSLog(@"开始加载");
}
//当内容开始返回时调用
-(void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation {
    NSLog(@"内容开始返回");
}

//加载完成之后调用
-(void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
    NSLog(@"加载完成");
}

//加载失败时调用
-(void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error {
    NSLog(@"加载失败 error :  %@", error.localizedDescription);
}

@end