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类微信返回导航WebViewController

AXWebViewController

Summary

AXWebViewController 是一款易用的基于 UIWebView （20160716更新：iOS8.0以上使用 WKWebView 实现）封装的网页浏览控制器. 在系统功能的基础上添加了工具条导航，可以刷新、返回、前进、等操作，同时， AXWebViewController 还实现了 微信样式 的导航返回支持，集成简单，使用方便。如图所示：

视频链接

Features

手势滑动返回上个网页
微信样式导航返回
网页加载失败提示（iOS8.0以下）
网页加载进度提示
网页来源提示
支持 Peek 和 Pop 浏览网页，并且commit之后在本网页进行加载，不用跳转到Safari进行浏览，这里使用到了很多运行时的方法，因此，在使用的过程中可能会抛异常。

Requirements

AXWebViewController 对系统版本支持到iOS7.0，需要使用到：

Foundation.framework
UIKit.framework

使用的时候最好使用最新版Xcode。

Adding AXWebViewController to your projet

CocoaPods

CocoaPods is the recommended way to add AXWebViewController to your project.

Add a pod entry for AXPopoverView to your Podfile pod 'AXWebViewController', '~> 0.1.10'
Install the pod(s) by running pod install .
Include AXPopoverView wherever you need it with #import "AXWebViewController.h" .

Source files

Alternatively you can directly add the AXWebViewController.h 、 AXWebNavigationViewController.h and AXWebViewController.m 、 AXWebNavigationViewController.m source files to your project.

Download thelatest code version or add the repository as a git submodule to your git-tracked project.
Open your project in Xcode, then drag and drop AXWebViewController.h and AXWebViewControllerm onto your project (use the "Product Navigator view"). Make sure to select Copy items when asked if you extracted the code archive outside of your project.
Include AXPopoverView wherever you need it with #import "AXWebViewController.h" .

License

This code is distributed under the terms and conditions of theMIT license.

Usage

AXWebViewController 使用和使用普通 UIViewController 一样简单，只需要在需要使用的地方使用 URL 初始化即可：

AXWebViewController *webVC = [[AXWebViewController alloc] initWithAddress:@"http://www.baidu.com"];
webVC.showsToolBar = NO;
webVC.navigationController.navigationBar.translucent = NO;
self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:0.100f green:0.100f blue:0.100f alpha:0.800f];
self.navigationController.navigationBar.barTintColor = [UIColor colorWithRed:0.996f green:0.867f blue:0.522f alpha:1.00f];
[self.navigationController pushViewController:webVC animated:YES];

使用工具条导航

使用工具条只需在 AXWebViewController 初始化之后加入一句代码：

webVC.navigationType = AXWebViewControllerNavigationToolItem;
webVC.showsToolBar = YES;

注意，在设置 navigationType 为 AXWebViewControllerNavigationToolItem 之后，须确认 showsToolBar 为 YES 才能生效.

使用微信样式导航

在 AXWebViewController 初始化之后加入一句代码：

webVC.navigationType = AXWebViewControllerNavigationBarItem;

即可生效.

Peek&Pop

Peek和Pop使用的是原生的系统功能，在使用的时候只需要将 webView.allowsLinkPreview 设置为 YES 即可使用，这里需要注意下，在实现Peek和Pop的时候，使用了Runtime的相关知识，而且使用AOP的一个框架 Aspects 进行了编程，在使用的过程中可能会出错，当然，出错的几率也是很小的（苹果不可能隔三差五的去修改自家的Private API吧= =），实现原理就不多讲了，基本上就是运行时的一些知识，代码如下：

- (void)hookWebContentCommitPreviewHandler {
    // Find the `WKContentView` in the webview.
    __weak typeof(self) wself = self;
    for (UIView *_view in _webView.scrollView.subviews) {
    if ([_view isKindOfClass:NSClassFromString(@"WKContentView")]) {
    id _previewItemController = object_getIvar(_view, class_getInstanceVariable([_view class], "_previewItemController"));
    Class _class = [_previewItemController class];
    SEL _performCustomCommitSelector = NSSelectorFromString(@"previewInteractionController:interactionProgress:forRevealAtLocation:inSourceView:containerView:");
    [_previewItemController aspect_hookSelector:_performCustomCommitSelector withOptions:AspectPositionAfter usingBlock:^() {
        UIViewController *pred = [_previewItemController valueForKeyPath:@"presentedViewController"];
        [pred aspect_hookSelector:NSSelectorFromString(@"_addRemoteView") withOptions:AspectPositionAfter usingBlock:^() {
            UIViewController *_remoteViewController = object_getIvar(pred, class_getInstanceVariable([pred class], "_remoteViewController"));

            [_remoteViewController aspect_hookSelector:@selector(viewDidLoad) withOptions:AspectPositionAfter usingBlock:^() {
                _remoteViewController.view.tintColor = wself.navigationController.navigationBar.tintColor;
            } error:NULL];
        } error:NULL];

        NSArray *ddActions = [pred valueForKeyPath:@"ddActions"];
        id openURLAction = [ddActions firstObject];

        [openURLAction aspect_hookSelector:NSSelectorFromString(@"perform") withOptions:AspectPositionInstead usingBlock:^ () {
            NSURL *_url = object_getIvar(openURLAction, class_getInstanceVariable([openURLAction class], "_url"));
            [wself loadURL:_url];
        } error:NULL];

        id _lookupItem = object_getIvar(_previewItemController, class_getInstanceVariable([_class class], "_lookupItem"));
        [_lookupItem aspect_hookSelector:NSSelectorFromString(@"commit") withOptions:AspectPositionInstead usingBlock:^() {
            NSURL *_url = object_getIvar(_lookupItem, class_getInstanceVariable([_lookupItem class], "_url"));
            [wself loadURL:_url];
        } error:NULL];
        [_lookupItem aspect_hookSelector:NSSelectorFromString(@"commitWithTransitionForPreviewViewController:inViewController:completion:") withOptions:AspectPositionInstead usingBlock:^() {
            NSURL *_url = object_getIvar(_lookupItem, class_getInstanceVariable([_lookupItem class], "_url"));
            [wself loadURL:_url];
        } error:NULL];
        /*
         UIWindow
         -UITransitionView
         --UIVisualEffectView
         ---_UIVisualEffectContentView
         ----UIView
         -----_UIPreviewActionSheetView
         */
        /*
         for (UIView * transitionView in [UIApplication sharedApplication].keyWindow.subviews) {
         if ([transitionView isMemberOfClass:NSClassFromString(@"UITransitionView")]) {
         transitionView.tintColor = wself.navigationController.navigationBar.tintColor;
         for (UIView *__view in transitionView.subviews) {
         if ([__view isMemberOfClass:NSClassFromString(@"UIVisualEffectView")]) {
         for (UIView *___view in __view.subviews) {
         if ([___view isMemberOfClass:NSClassFromString(@"_UIVisualEffectContentView")]) {
         for (UIView *____view in ___view.subviews) {
         if ([____view isMemberOfClass:NSClassFromString(@"UIView")]) {
         __weak typeof(____view) w____view = ____view;
         [____view aspect_hookSelector:@selector(addSubview:) withOptions:AspectPositionAfter usingBlock:^() {
         for (UIView *actionSheet in w____view.subviews) {
         if ([actionSheet isMemberOfClass:NSClassFromString(@"_UIPreviewActionSheetView")]) {
         break;
         }
         }
         } error:NULL];
         }
         }break;
         }
         }break;
         }
         }break;
         }
         }
         */
    } error:NULL];
    break;
    }
    }
}