import "FindViewController.h"

#import <WebKit/WebKit.h>
#import "AFNetworkReachabilityManager.h"
#import "MBProgressHUD+MJ.h"
#import "AFHTTPRequestOperationManager.h"


#define MainColor     UIColorFromRGB(0x1FB5EC)  //主色
#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
#define WebViewNav_TintColor ([UIColor orangeColor])
#define Width self.view.bounds.size.width
#define Height self.view.bounds.size.height
@interface FindViewController ()<WKNavigationDelegate,UIScrollViewDelegate>

@property (assign,nonatomic) NSUInteger loadCount;
@property (assign,nonatomic) UIProgressView *progressView;
@property (assign,nonatomic) WKWebView *wkWebView;
@property (weak, nonatomic) IBOutlet UIView *refreshView;

@end

@implementation FindViewController

//禁止WKWebView的手势捏拉缩放
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {

       return nil;

}

- (void)viewDidLoad {
[super viewDidLoad];

UIProgressView *progress = [[UIProgressView alloc]initWithFrame:CGRectMake(0, 0.1, Width, 0)];
progress.tintColor = MainColor;
progress.trackTintColor = [UIColor whiteColor];
[self.view addSubview:progress];
self.progressView = progress;

WKWebView *wkWebView = [[WKWebView alloc]initWithFrame:CGRectMake(0, 0, Width, Height - 44)];
wkWebView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
[wkWebView addObserver:self forKeyPath:@"estimatedProgress" options:NSKeyValueObservingOptionNew context:nil];
[self.view insertSubview:wkWebView belowSubview:progress];

_wkWebView.scrollView.delegate = self;

self.wkWebView = wkWebView;

[self loadData];

}

- (void)loadData{

self.refreshView.hidden = YES;
NSURL *url = [NSURL URLWithString:@"https://www.baidu.com"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPRequestOperation *operation1 = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation1 setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    [self requestUrl];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    [MBProgressHUD showError:@"请检查网络"];
    self.refreshView.hidden = NO;
    [self.view bringSubviewToFront:self.refreshView];
    
}];
[operation1 start];

}
- (void)requestUrl{

NSURL *url = [NSURL URLWithString:@"https://www.baidu.com"];
NSURLRequest *req = [NSURLRequest requestWithURL:url];
[self.wkWebView loadRequest:req];
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context{

if (object == self.wkWebView && [keyPath isEqualToString:@"estimatedProgress"]) {
    CGFloat newProgress = [[change objectForKey:NSKeyValueChangeNewKey] doubleValue];
    if (newProgress == 1) {
        self.progressView.hidden = YES;
        [self.progressView setProgress:0 animated:NO];
    }else{
        self.progressView.hidden = NO;
        [self.progressView setProgress:newProgress animated:YES];
    }
}
}

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


}



- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(null_unspecified WKNavigation *)navigation{

// 页面开始加载时调用


}


- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(null_unspecified WKNavigation *)navigation{
// 接收到服务器跳转请求之后调用


}
- (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *__nullable credential))completionHandler{

completionHandler(NSURLSessionAuthChallengePerformDefaultHandling ,nil);


}

//以下三个是连续调用

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

// 在收到响应后，决定是否跳转和发送请求之前那个允许配套使用
decisionHandler(WKNavigationResponsePolicyAllow);


}



- (void)webView:(WKWebView *)webView didCommitNavigation:(null_unspecified WKNavigation *)navigation{

// 当内容开始返回时调用



}


- (void)webView:(WKWebView *)webView didFinishNavigation:(null_unspecified WKNavigation *)navigation{
// 页面加载完成之后调用



}
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation withError:(NSError *)error{

}
- (void)webView:(WKWebView *)webView didFailNavigation:(WKNavigation *)navigation withError:(NSError *)error{

}
-(void)dealloc{
[self.wkWebView removeObserver:self forKeyPath:@"estimatedProgress"];
}

DEMO下载地址：https://github.com/WSGNSLog/WKWebView