YYXC_Student/jiaPei/Modules/BaseModule/BaseClass/ViewController/RQWebViewViewController.m

//
//  RQWebViewViewController.m
//  RQCommon
//
//  Created by 张嵘 on 2018/11/27.
//  Copyright © 2018 张嵘. All rights reserved.
//

#import "RQWebViewViewController.h"
#import "WKWebViewJavascriptBridge.h"
#import <AlipaySDK/AlipaySDK.h>

@interface RQWebViewViewController ()
/// webView
@property (nonatomic, weak, readwrite) WKWebView *webView;
/// 进度条
@property (nonatomic, readwrite, strong) UIProgressView *progressView;
/// 返回按钮
@property (nonatomic, readwrite, strong) UIBarButtonItem *backItem;
/// 关闭按钮 （点击关闭按钮  退出WebView）
@property (nonatomic, readwrite, strong) UIBarButtonItem *closeItem;
/// viewModel
@property (nonatomic, strong, readonly) RQWebViewModel *viewModel;
@end

@implementation RQWebViewViewController
@dynamic viewModel;

- (void)dealloc{
	RQDealloc;
	/// remove observer ,otherwise will crash
	[_webView stopLoading];
}

- (void)viewWillAppear:(BOOL)animated {
	[super viewWillAppear:animated];
	[self.navigationController.navigationBar addSubview:self.progressView];
	/// 加载请求数据
	[self.webView loadRequest:self.viewModel.request];
}

- (void)viewWillDisappear:(BOOL)animated {
	[super viewWillDisappear:animated];
	[self.progressView removeFromSuperview];
}

- (void)viewDidLoad {
	[super viewDidLoad];
	
	/// 添加断言，request错误 应用直接crash
	NSParameterAssert(self.viewModel.request);
	
	
	self.navigationItem.leftBarButtonItem = self.backItem;
	
	
	///CoderMikeHe FIXED: 切记 lightempty_ios 是前端跟H5商量的结果，请勿修改。
	NSString *userAgent = @"wechat_ios";
	
	if (!(RQIOSVersion>=9.0)) [[NSUserDefaults standardUserDefaults] registerDefaults:@{@"userAgent":userAgent}];
	
	/// 注册JS
	WKUserContentController *userContentController = [[WKUserContentController alloc] init];
	/// 这里可以注册JS的处理 涉及公司私有方法 这里笔者不作处理
	
	WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
	// CoderMikeHe Fixed : 自适应屏幕宽度js
	NSString *jsString = @"var meta = document.createElement('meta'); meta.setAttribute('name', 'viewport'); meta.setAttribute('content', 'width=device-width'); document.getElementsByTagName('head')[0].appendChild(meta);";
	WKUserScript *userScript = [[WKUserScript alloc] initWithSource:jsString injectionTime:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:YES];
	// 添加自适应屏幕宽度js调用的方法
	[userContentController addUserScript:userScript];
	/// 赋值userContentController
	configuration.userContentController = userContentController;
	
	WKWebView *webView = [[WKWebView alloc] initWithFrame:RQ_SCREEN_BOUNDS configuration:configuration];
	webView.navigationDelegate = self;
	webView.UIDelegate = self;
	
	if (@available(iOS 9.0, *)) {
		webView.customUserAgent = userAgent;
	} else {
		// Fallback on earlier versions
	}
	self.webView = webView;
	[self.view addSubview:webView];
	
	/// oc调用js
	[webView evaluateJavaScript:@"navigator.userAgent" completionHandler:^(id result, NSError *error) {
		NSLog(@"navigator.userAgent.result is ++++ %@", result);
	}];
	
	/// 监听数据
	@weakify(self);
	/// binding self.viewModel.avatarUrlString
	[RACObserve(self.webView, title) subscribeNext:^(NSString *titleStr) {
		@strongify(self);
		NSLog(@"%@",titleStr);
		/// CoderMikeHe FIXED: 这里只设置导航栏的title 以免self.title 设置了tabBarItem.title
		if (!self.viewModel.shouldDisableWebViewTitle) self.navigationItem.title = self.webView.title;
	}];
	
	[RACObserve(self.webView, loading) subscribeNext:^(NSNumber *currentLoadingState) {
		BOOL isLoading = [currentLoadingState boolValue];
		if (isLoading) {
			NSLog(@"--- webView is loading ---");
		}else {
			NSLog(@"--- webView isn't loading ---");
		}
	}];
	
	[RACObserve(self.webView, estimatedProgress) subscribeNext:^(NSNumber *estimatedProgressValue) {
		NSLog(@"%@",estimatedProgressValue);
		@strongify(self);
		[self.progressView setAlpha:1.0f];
		[self.progressView setProgress:self.webView.estimatedProgress animated:YES];
		if(self.webView.estimatedProgress >= 1.0f) {
			[UIView animateWithDuration:0.3 delay:0.3 options:UIViewAnimationOptionCurveEaseOut animations:^{
				[self.progressView setAlpha:0.0f];
			} completion:^(BOOL finished) {
				[self.progressView setProgress:0.0f animated:NO];
			}];
		}
	}];
	
	/// 添加刷新控件
	if(self.viewModel.shouldPullDownToRefresh){
		[self.webView.scrollView rq_addHeaderRefresh:^(MJRefreshNormalHeader *header) {
			@strongify(self);
			[self.webView reload];
		}];
		[self.webView.scrollView.mj_header beginRefreshing];
	}
	self.webView.scrollView.contentInset = self.contentInset;
	
	/// CoderMikeHe: 适配 iPhone X + iOS 11，去掉安全区域
	if (@available(iOS 11.0, *)) {
		RQAdjustsScrollViewInsets_Never(webView.scrollView);
	}
}

#pragma mark - 事件处理
- (void)_backItemDidClicked{ /// 返回按钮事件处理
	/// 可以返回到上一个网页，就返回到上一个网页
	if (self.webView.canGoBack) {
		[self.webView goBack];
	}else{/// 不能返回上一个网页，就返回到上一个界面
		/// 判断 是Push还是Present进来的，
		if (self.presentingViewController) {
			[self.viewModel.services dismissViewModelAnimated:YES completion:NULL];
		} else {
			[self.viewModel.services popViewModelAnimated:YES];
		}
	}
}

- (void)_closeItemDidClicked{
	/// 判断 是Push还是Present进来的
	if (self.presentingViewController) {
		[self.viewModel.services dismissViewModelAnimated:YES completion:NULL];
	} else {
		[self.viewModel.services popViewModelAnimated:YES];
	}
}

- (UIEdgeInsets)contentInset{
	return UIEdgeInsetsMake(RQ_APPLICATION_TOP_BAR_HEIGHT, 0, 0, 0);
}




#pragma mark - WKScriptMessageHandler
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message{
	/// js call OC function
	
}

#pragma mark - WKNavigationDelegate
/// 内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(null_unspecified WKNavigation *)navigation {
	/// 不显示关闭按钮
	if(self.viewModel.shouldDisableWebViewClose) return;
	
	UIBarButtonItem *backItem = self.navigationItem.leftBarButtonItems.firstObject;
	if (backItem) {
		if ([self.webView canGoBack]) {
			[self.navigationItem setLeftBarButtonItems:@[backItem, self.closeItem]];
		} else {
			[self.navigationItem setLeftBarButtonItems:@[backItem]];
		}
	}
}

// 导航完成时，会回调（也就是页面载入完成了）
- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation {
	if (self.viewModel.shouldPullDownToRefresh) [webView.scrollView.mj_header endRefreshing];
}

// 导航失败时会回调
- (void)webView:(WKWebView *)webView didFailNavigation:(null_unspecified WKNavigation *)navigation withError:(NSError *)error {
	if (self.viewModel.shouldPullDownToRefresh) [webView.scrollView.mj_header endRefreshing];
}

// 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
	NSLog(@"navigationAction.request.URL:   %@", navigationAction.request.URL);
	decisionHandler(WKNavigationActionPolicyAllow);
}

- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler {
	decisionHandler(WKNavigationResponsePolicyAllow);
}

- (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *__nullable credential))completionHandler {
	NSURLCredential *cred = [[NSURLCredential alloc] initWithTrust:challenge.protectionSpace.serverTrust];
	completionHandler(NSURLSessionAuthChallengeUseCredential, cred);
}

#pragma mark - WKUIDelegate
- (nullable WKWebView *)webView:(WKWebView *)webView createWebViewWithConfiguration:(WKWebViewConfiguration *)configuration forNavigationAction:(WKNavigationAction *)navigationAction windowFeatures:(WKWindowFeatures *)windowFeatures {
	/// CoderMike Fixed : 解决点击网页的链接 不跳转的Bug。
	WKFrameInfo *frameInfo = navigationAction.targetFrame;
	if (![frameInfo isMainFrame]) {
		[webView loadRequest:navigationAction.request];
	}
	return nil;
}

#pragma mark runJavaScript
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
	[NSObject rq_showAlertViewWithTitle:nil message:message confirmTitle:@"我知道了"];
	completionHandler();
}

- (void)webView:(WKWebView *)webView runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(BOOL result))completionHandler {
	completionHandler(YES);
}

- (void)webView:(WKWebView *)webView runJavaScriptTextInputPanelWithPrompt:(NSString *)prompt defaultText:(nullable NSString *)defaultText initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(NSString * __nullable result))completionHandler {
	completionHandler(defaultText);
}



#pragma mark - Getter & Setter
- (UIProgressView *)progressView {
	if (!_progressView) {
		CGFloat progressViewW = RQ_SCREEN_WIDTH;
		CGFloat progressViewH = 3;
		CGFloat progressViewX = 0;
		CGFloat progressViewY = CGRectGetHeight(self.navigationController.navigationBar.frame) - progressViewH + 1;
		UIProgressView *progressView = [[UIProgressView alloc] initWithFrame:CGRectMake(progressViewX, progressViewY, progressViewW, progressViewH)];
		progressView.progressTintColor = RQ_MAIN_TINTCOLOR;
		progressView.trackTintColor = [UIColor clearColor];
		[self.view addSubview:progressView];
		self.progressView = progressView;
	}
	return _progressView;
}


- (UIBarButtonItem *)backItem
{
	if (_backItem == nil) {
		_backItem = [UIBarButtonItem rq_backItemWithTitle:@"返回" imageName:@"barbuttonicon_back_15x30" target:self action:@selector(_backItemDidClicked)];
	}
	return _backItem;
}

- (UIBarButtonItem *)closeItem {
	if (!_closeItem) {
		_closeItem = [UIBarButtonItem rq_systemItemWithTitle:@"关闭" titleColor:nil imageName:nil target:self selector:@selector(_closeItemDidClicked) textType:YES];
	}
	return _closeItem;
}

@end