zuoyebang/tongxin/VC/Activity/ActivityWebViewController.m

//
//  WebViewController.m
//  tongxin
//
//  Created by weichao on 2019/03/01.
//  Copyright © 2019年 weichao. All rights reserved.
//
#import "ActivityWebViewController.h"
#import <MapKit/MapKit.h>
#import "Reachability.h"

@interface ActivityWebViewController()<WKUIDelegate,WKNavigationDelegate,WKScriptMessageHandler,CLLocationManagerDelegate>


{
    CGRect WebFrame;
    BOOL _locationAuthorization; // 用户是否授权使用定位
    BOOL _isDidLoadWeb;
}
/**
 隐藏导航栏时有的返回按钮
 */
@property (nonatomic, strong) UIButton *backBtn;
@property (nonatomic, strong) UIProgressView *progressView;
@property (strong,nonatomic) CLLocationManager* locationManager;
@property (nonatomic, strong) NSString *cityName;
@property (nonatomic, strong) UIView *tempView;

@end
@implementation ActivityWebViewController

- (WKWebView *)myWebView{
    if (!_myWebView) {
        //创建 WKWebView 配置对象
        
        
        WKWebViewConfiguration *config = [WKWebViewConfiguration new];
        //        config.userContentController = wkUController;
        WKPreferences *preferences = [WKPreferences new];
        preferences.javaScriptCanOpenWindowsAutomatically = YES;
        //        preferences.minimumFontSize = 40.0;
        config.preferences = preferences;
        CGFloat tabBarHeight = self.tabBarController.tabBar.height;
        
        CGRect tempViewFrame;
        if(getRectNavAndStatusHight > 64){
            //X
            if(self.isShowBack){
                WebFrame = CGRectMake(0, getRectNavAndStatusHight-44, ScreenWidth, ScreenHeight-tabBarHeight-getRectNavAndStatusHight+44                                                                                                            );
                tempViewFrame = CGRectMake(0, 0, ScreenWidth, getRectNavAndStatusHight-44);
            }else{
                CGFloat WebNacv = 55; //网页的导航栏高度
                WebFrame = CGRectMake(0, getRectNavAndStatusHight-WebNacv, ScreenWidth, ScreenHeight-tabBarHeight-getRectNavAndStatusHight+WebNacv                                                                                                            );
                tempViewFrame = CGRectMake(0, 0, ScreenWidth, getRectNavAndStatusHight-WebNacv);
            }
        }else{
            if(self.isShowBack){
                WebFrame = CGRectMake(0, 0, ScreenWidth, ScreenHeight-tabBarHeight);
                tempViewFrame = CGRectMake(0, 0, ScreenWidth, 0);
            }else{
                //不显示返回按钮的是首页
                WebFrame = CGRectMake(0, 20, ScreenWidth, ScreenHeight-tabBarHeight-20);
                tempViewFrame = CGRectMake(0, 0, ScreenWidth, 20);
                
            }
        }
        
        _tempView = [[UIView alloc] initWithFrame:tempViewFrame];
        _tempView.backgroundColor = mainColor;
        [self.view addSubview:_tempView];
        _tempView.hidden = YES;
        _myWebView = [[WKWebView alloc] initWithFrame:WebFrame configuration:config];
        if (@available(iOS 11.0, *)) {
            _myWebView.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
        } else {
            self.edgesForExtendedLayout = UIRectEdgeNone;
        }
        
        [self.view addSubview:_myWebView];
    }
    return _myWebView;
}

-(void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    //隐藏导航栏
    //    [[UIApplication sharedApplication] setStatusBarHidden:YES];
    [self.navigationController.navigationBar setHidden:YES];
    
    // addScriptMessageHandler 很容易导致循环引用
    // 控制器 强引用了WKWebView,WKWebView copy(强引用了）configuration， configuration copy （强引用了）userContentController
    // userContentController 强引用了 self （控制器）
    
    [self.myWebView.configuration.userContentController addScriptMessageHandler:self name:@"Location"];
    
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(loadURL) name:NoReachableRefreshNotification object:nil];
    if(![self.url containsString:ActivityURLStr]){
        xLog(@"不是首页:%@",self.url);
        [self setHiddenTabBottomBar:YES];
    }else{
        xLog(@"是首页:%@",self.url);
        [self setHiddenTabBottomBar:NO];
    }
}
-(void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    
    // 因此这里要记得移除handlers
    [self.myWebView.configuration.userContentController removeScriptMessageHandlerForName:@"Location"];
    
}
-(void)viewDidDisappear:(BOOL)animated{
    self.tabBarController.tabBar.hidden = NO;
    
    [[NSNotificationCenter defaultCenter] removeObserver:self name:NoReachableRefreshNotification object:nil];
}

//-(BOOL)prefersStatusBarHidden{
//    if(self.isHiddenNavigationBar){
//        return YES;
//    }else{
//        return NO;
//    }
//}

- (void)viewDidLoad{
    self.view.backgroundColor = [UIColor whiteColor];
    [super viewDidLoad];
    if(!self.url){
        self.url =  ActivityURLStr;
        [UICommon MessageUpload:@"正在加载"];
    }
    [self loadURL];
    WEAKSELF
    self.myWebView.UIDelegate = self;
    self.myWebView.navigationDelegate = self;
    self.myWebView.scrollView.mj_header = [MJRefreshNormalHeader headerWithRefreshingBlock:^{
        [weakSelf loadURL];
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [weakSelf.myWebView.scrollView.mj_header endRefreshing];
        });
    }];
    
    if(self.isShowBack){
        UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeSystem];
        backBtn.frame = CGRectMake(14, 40, 30, 30);
        [backBtn setBackgroundImage:[UIImage imageNamed:@"icon_return_black"] forState:0];
        [backBtn addTarget:self action:@selector(goBack:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:backBtn];
    }
    
    
    [self initProgressView];
    [self startLocation];
    //    [self.myWebView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:nil];
    //    if(self.isHiddenNavigationBar){
    //        //创建返回按钮
    //        _backBtn = [UIButton buttonWithType:UIButtonTypeSystem];
    //        _backBtn.frame = CGRectMake(5, 26, 30, 30);
    //        [_backBtn setBackgroundImage:[UIImage imageNamed:@"icon_return_round"] forState:0];
    //        [_backBtn addTarget:self action:@selector(goBack:) forControlEvents:UIControlEventTouchUpInside];
    //        [self.view addSubview:_backBtn];
    //    }
}
- (void)loadURL{
    [self.myWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.url]]];
    if(!self.cityName && _locationAuthorization){
        [self startLocation];
    }
}


- (void)initProgressView
{
    CGFloat kScreenWidth = [[UIScreen mainScreen] bounds].size.width;
    UIProgressView *progressView = [[UIProgressView alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, 2)];
    progressView.tintColor = [UIColor redColor];
    progressView.trackTintColor = [UIColor lightGrayColor];
    [self.view addSubview:progressView];
    self.progressView = progressView;
}

//开始定位

-(void)startLocation{
    if(!self.locationManager){
        self.locationManager = [[CLLocationManager alloc] init];
        self.locationManager.delegate = self;
        self.locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
        // 位置变更距离
        self.locationManager.distanceFilter = 1000.0f;
        if ([CurrentSystemVersion doubleValue] > 8.0){
            if([CLLocationManager authorizationStatus] == kCLAuthorizationStatusNotDetermined){
                [self.locationManager requestWhenInUseAuthorization];
            }
        }
        //    if ([CurrentSystemVersion doubleValue] >= 8.0) {
        //        _locationManager.allowsBackgroundLocationUpdates =YES;
        //    }
        //        [self locationManager:self.locationManager didChangeAuthorizationStatus:[CLLocationManager authorizationStatus]];
    }
    [self.locationManager startUpdatingLocation];
}

//MARK:  协议 CLLocationManagerDelegate

/**
 权限改变
 */
-(void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status{
    switch (status) {
        case kCLAuthorizationStatusNotDetermined:
            if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]){
                [self.locationManager requestWhenInUseAuthorization];
            }
            break;
        case kCLAuthorizationStatusDenied:
            xLog(@"用户拒绝获取定位位置");
            _locationAuthorization = NO;
            break;
        case kCLAuthorizationStatusAuthorizedAlways:
        case kCLAuthorizationStatusAuthorizedWhenInUse:
            xLog(@"用户同意获取定位位置");
            if(!self.cityName){
                [self.locationManager startUpdatingLocation];
            }
            
            break;
        default:
            break;
    }
}

/**
 位置更新
 */
-(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations{
    //此处locations存储了持续更新的位置坐标值，取最后一个值为最新位置，如果不想让其持续更新位置，则在此方法中获取到一个值之后让locationManager stopUpdatingLocation
    CLLocation *currentLocation = [locations lastObject];
    // 获取当前所在的城市名
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    //根据经纬度反向地理编译出地址信息
    WEAKSELF
    [geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
        if (placemarks.count > 0){
            CLPlacemark *placemark = [placemarks objectAtIndex:0];
            //将获得的所有信息显示到label上
            NSLog(@"%@",placemark.name);
            //获取城市
            NSString *city = placemark.locality;
            self.cityName = city;
            if (!city) {
                //四大直辖市的城市信息无法通过locality获得，只能通过获取省份的方法来获得（如果city为空，则可知为直辖市）
                city = placemark.administrativeArea;
                weakSelf.cityName = city;
                //如果这个时候网页已经加载完成了,那就 重新加载一次
                if(_isDidLoadWeb){
                    [weakSelf loadURL];
                }
            }else if (error == nil && [placemarks count] == 0){
                NSLog(@"No results were returned.");
            }else if (error != nil){
                NSLog(@"An error occurred = %@", error);
            }
        }
    }];
    
    //系统会一直更新数据，直到选择停止更新，因为我们只需要获得一次经纬度即可，所以获取之后就停止更新
    [manager stopUpdatingLocation];
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
    if (error.code == kCLErrorDenied) {
        // 提示用户出错原因，可按住Option键点击 KCLErrorDenied的查看更多出错信息，可打印error.code值查找原因所在
    }
}


- (void)dealloc
{
    NSLog(@"%s",__FUNCTION__);
    self.myWebView.UIDelegate = nil;
    self.myWebView.navigationDelegate = nil;
    
    [[NSNotificationCenter defaultCenter] removeObserver:self name:NoReachableRefreshNotification object:nil];
    //    [self.myWebView removeObserver:self forKeyPath:@"estimatedProgress"];
}
#pragma mark - private method
- (void)getLocation
{
    if(!_locationAuthorization){
        return;
    }
    // 获取位置信息
    if(self.cityName){
        // MARK: 原生 调用 JS
        NSString *city = [self.cityName stringByReplacingOccurrencesOfString:@"市" withString:@""];
        NSString *jsStr = [NSString stringWithFormat:@"setLocation('%@')",city];
        [self.myWebView evaluateJavaScript:jsStr completionHandler:^(id _Nullable result, NSError * _Nullable error) {
            NSLog(@"%@----%@",result, error);
        }];
    }else{
        //如果定位还未成功那就2秒之后再调用一次
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [self getLocation];
        });
    }
    
    
}

#pragma mark - KVO
// 计算wkWebView进度条
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
    if (object == self.myWebView && [keyPath isEqualToString:@"estimatedProgress"]) {
        CGFloat newprogress = [[change objectForKey:NSKeyValueChangeNewKey] doubleValue];
        if (newprogress == 1) {
            [self.progressView setProgress:1.0 animated:YES];
            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.7 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                self.progressView.hidden = YES;
                [self.progressView setProgress:0 animated:NO];
            });
            
        }else {
            self.progressView.hidden = NO;
            [self.progressView setProgress:newprogress animated:YES];
        }
    }
}

#pragma mark - WKUIDelegate
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler
{
    
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提醒" message:message preferredStyle:UIAlertControllerStyleAlert];
    [alert addAction:[UIAlertAction actionWithTitle:@"知道了" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        completionHandler();
    }]];
    
    [self presentViewController:alert animated:YES completion:nil];
}
//MARK: 协议 WKNavigationDelegate

/**
 MARK: 页面加载完成之后调用
 */
-(void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
    _isDidLoadWeb = YES;
    Reachability *reach = [Reachability reachabilityForInternetConnection];
    [UICommon HidenLoading];
    if([reach currentReachabilityStatus] == NotReachable){
        xLog(@"无网络");
        _tempView.hidden = YES;
        self.myWebView.hidden = YES;
        [UICommon MessageErrorText:NSLocalizedStringFromTable(@"请检查您的网络设置", @"Localization", @"")];
    }else{
        xLog(@"有网络");
        _tempView.hidden = NO;
        
        self.myWebView.hidden = NO;
    }
}

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    //如果是跳转一个新页面
    if (navigationAction.targetFrame == nil) {
        WEAKSELF
        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            ActivityWebViewController* vc = [ActivityWebViewController new];
            vc.url = navigationAction.request.URL.absoluteString;
            vc.isShowBack = YES;
            vc.hidesBottomBarWhenPushed = YES;
            [weakSelf.navigationController pushViewController:vc animated:YES];
        });
        decisionHandler(WKNavigationActionPolicyCancel);
        return;
    }
    self.url = navigationAction.request.URL.absoluteString;
    if(![self.url containsString:ActivityURLStr]){
        xLog(@"不是首页:%@",self.url);
        [self setHiddenTabBottomBar:YES];
    }else{
        xLog(@"是首页:%@",self.url);
        [self setHiddenTabBottomBar:NO];
    }
    decisionHandler(WKNavigationActionPolicyAllow);
    
    
}

- (void)webView:(WKWebView *)webView didFailNavigation:(WKNavigation *)navigation withError:(NSError *)error{
    xLog(@"didFailNavigation error:%@",error.description);
}

- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error{
    xLog(@"didFailProvisionalNavigation error:%@",error.description);
    [self webView:webView didFinishNavigation:navigation];
}




/**
 隐藏或者显示 TabBottomBar
 */
-(void)setHiddenTabBottomBar:(BOOL)hidden{
    self.tabBarController.tabBar.hidden = hidden;
    
    if(hidden){
        //隐藏
        self.myWebView.height = WebFrame.size.height+self.tabBarController.tabBar.height;
    }else{
        //显示
        self.myWebView.frame = WebFrame;
    }
}

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
    scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
}
#pragma mark - WKScriptMessageHandler  JS调用 原生会调用这里
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
{
    //    message.body  --  Allowed types are NSNumber, NSString, NSDate, NSArray,NSDictionary, and NSNull.
    NSLog(@"body:%@",message.body);
    if ([message.name isEqualToString:@"Location"]) {
        [self getLocation];
    }
    //    else if ([message.name isEqualToString:@"Share"]) {
    //        [self shareWithParams:message.body];
    //    } else if ([message.name isEqualToString:@"Color"]) {
    //        [self changeBGColor:message.body];
    //    } else if ([message.name isEqualToString:@"Pay"]) {
    //        [self payWithParams:message.body];
    //    } else if ([message.name isEqualToString:@"Shake"]) {
    //        [self shakeAction];
    //    } else if ([message.name isEqualToString:@"GoBack"]) {
    //        [self goBack];
    //    } else if ([message.name isEqualToString:@"PlaySound"]) {
    //        [self playSound:message.body];
    //    }
}

@end