WKWebView跳转 获取跳转链接url 获取标题title

WKWebView跳转后的页面URL获取处理。直接贴代码。
DDBWebViewController.h

//
//  DDBWebViewController.h
//  DDBIOS
//
//  Created by liwx on 2018/3/14.
//  Copyright © 2018年 io.lwx. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface DDBWebViewController : DDBViewController
@property (nonatomic, strong) NSString *urlString;
@property (nonatomic, strong) NSString *titleName;//标题
@end

DDBWebViewController.m

//
//  DDBWebViewController.m
//  DDBIOS
//
//  Created by liwx on 2018/3/14.
//  Copyright © 2018年 io.lwx. All rights reserved.
//

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

@interface DDBWebViewController ()<WKUIDelegate,WKNavigationDelegate>

@property (weak, nonatomic)WKWebView *webView;

@property (nonatomic, strong) NSString *originUrlString;//原始URL


@end

@implementation DDBWebViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    WKWebView *web = [[WKWebView alloc]  initWithFrame:self.view.bounds];
    [self.view addSubview:web];
    [web mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.view);
    }];
    typeof(self) weakSelf = self;
    web.UIDelegate = self;
    web.navigationDelegate = weakSelf;

    self.webView = web;
    self.originUrlString = self.urlString.copy;
    if (self.urlString.length) {
        if (![self.urlString hasPrefix:@"http"]) {
            self.urlString = [NSString stringWithFormat:@"http://%@",self.urlString];
        }
        if ([self.urlString containsString:@"?"]) {
            if (![self.urlString containsString:@"fromApp=1"]) {
                self.urlString = [self.urlString stringByAppendingString:@"&fromApp=1"];
            }
        } else {
            self.urlString = [self.urlString stringByAppendingString:@"?fromApp=1"];
        }
        NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:self.urlString]];
        [self.webView loadRequest:request];
    }
    [self initRightItem];
    [self initBackItem];
    [self.webView addObserver:self forKeyPath:@"title" options:NSKeyValueObservingOptionNew context:NULL];
    //修改滚动速度
    for (UIView *v in self.webView.subviews) {
        if ([v isKindOfClass:NSClassFromString(@"WKScrollView")]) {
            UIScrollView *sv = (UIScrollView *)v;
            sv.decelerationRate = UIScrollViewDecelerationRateFast;
        }
    }
}

#pragma mark KVO的监听代理
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
    //网页title
    if ([keyPath isEqualToString:@"title"]) {
        if (object == self.webView) {
            self.titleName = self.webView.title;
        } else {
            [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
        }
     } else {
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
     }
}

#pragma mark 移除观察者
- (void)dealloc
{
    [self.webView removeObserver:self forKeyPath:@"title"];
}

- (void)initBackItem {
    UIButton *backItem = [UIButton buttonWithType:UIButtonTypeCustom];
    UIImageView *img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"back_arrow_white"]];
    [backItem addSubview:img];
    backItem.frame = CGRectMake(0, 0, 60, 44);
    img.centerY = backItem.centerY;
    [backItem addTarget:self action:@selector(backButtonAction) forControlEvents:UIControlEventTouchUpInside];
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backItem];
}


- (void)backButtonAction {
//    //返回
//    if ([self.webView canGoBack]) {
//        [self.webView goBack];
//        return;
//    }
    [self.navigationController popViewControllerAnimated:YES];

}

- (void)initRightItem {
    UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [rightButton setImage:[UIImage imageNamed:@"share-white"] forState:UIControlStateNormal];
    [rightButton setImage:[UIImage imageNamed:@"share-white"] forState:UIControlStateSelected];
    [rightButton setImage:[UIImage imageNamed:@"share-white"] forState:UIControlStateHighlighted];
    //rightButton.showsTouchWhenHighlighted = YES;
    [rightButton addTarget:self action:@selector(shareAction) forControlEvents:UIControlEventTouchUpInside];
    [self.navigationBar addSubview:rightButton];
    rightButton.frame = CGRectMake(SCREEN_WIDTH - 44, 0, 44, 44);
}

- (void)shareAction {
    //分享URL
    [UMSocialUIManager showShareMenuViewInWindowWithPlatformSelectionBlock:^(UMSocialPlatformType platformType, NSDictionary *userInfo) {
        [self sharedToPlatform:platformType];
    }];
}

- (void)sharedToPlatform:(UMSocialPlatformType)type {
   //
}

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

// 类似 UIWebView的 -webView: shouldStartLoadWithRequest: navigationType:
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation {
    NSLog(@"aaaa redirect....");
}

// 在收到响应后，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
    NSLog(@"在收到响应后：%@",navigationResponse.response.URL.absoluteString);
    //允许跳转
    decisionHandler(WKNavigationResponsePolicyAllow);
    //不允许跳转
    //decisionHandler(WKNavigationResponsePolicyCancel);
}

// 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{

    NSString *url = navigationAction.request.URL.absoluteString;
    if (navigationAction.targetFrame.isMainFrame) {
        NSLog(@"target is main ... %@",url);
        if (navigationAction.sourceFrame.mainFrame) {
            NSLog(@"source is main...%@",url);
            //是原始url 放行
            if ([self.urlString isEqualToString:url]) {
                decisionHandler(WKNavigationActionPolicyAllow);
                NSLog(@"放行bbbbbbbbbbbbbbbbb...%@",url);
                return;
            }

            //不是原始url
            if ([url isEqualToString:self.originUrlString]) {
                //不是跳转后的url 放行
                decisionHandler(WKNavigationActionPolicyAllow);
                return;
            }
            //push后 修改后的url 放行
            if ([url containsString:@"fromApp=1"]) {
                decisionHandler(WKNavigationActionPolicyAllow);
                return;
            }
            //跳转
            NSLog(@"跳转aaaaaaaaaaaaaaaaaaaaaa...%@",url);
            decisionHandler(WKNavigationActionPolicyCancel);
            DDBWebViewController *pwVC = [[DDBWebViewController alloc] init];
            pwVC.urlString = url;
            [self.navigationController pushViewController:pwVC animated:YES];
            return;
        } else {
            NSLog(@"source is not main...%@",url);
        }
    } else {
        NSLog(@"target is not main ... %@",url);
    }
    decisionHandler(WKNavigationActionPolicyAllow);
    NSLog(@"在发送请求之前：%@",navigationAction.request.URL.absoluteString);
}

@end