ios H5支付、取消后停留在微信？支付后返回Safari？

1、首先用到webview的代理

//在发送请求之前，决定是否跳转
-(void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    
    NSURLRequest *request        = navigationAction.request;
    NSString     *scheme         = [request.URL scheme];
    
    NSString     *absoluteString = [navigationAction.request.URL.absoluteString stringByRemovingPercentEncoding];
    NSLog(@"Current URL is %@",absoluteString);
    
    static NSString *endPayRedirectURL = nil;

    if ([absoluteString hasPrefix:@"alipays://"] || [absoluteString hasPrefix:@"alipay://"])
    {
        NSURL *openedURL = navigationAction.request.URL;
        
        NSString *prefixString = @"alipay://alipayclient/?";
        //替换里面的默认Scheme为自己的Scheme
        
        NSString *urlString = [[self xh_URLDecodedString:absoluteString] stringByReplacingOccurrencesOfString:@"alipays" withString:[NSString stringWithFormat:@"%@",LHAPIUrl.wechatpayRegisterUrl]];
        
        if ([urlString hasPrefix:prefixString]) {
            NSRange rang = [urlString rangeOfString:prefixString];
            NSString *subString = [urlString substringFromIndex:rang.length];
            NSString *encodedString = [prefixString stringByAppendingString:[self xh_URLEncodedString:subString]];
            openedURL = [NSURL URLWithString:encodedString];
        }
        BOOL isSucc = [[UIApplication sharedApplication] openURL:openedURL];
        if (!isSucc) {
            NSLog(@"未安装某宝客户端");
        }
        
        decisionHandler(WKNavigationActionPolicyCancel);
        return;
    }
    
    //h5 vxxx  拦截
    if ([absoluteString hasPrefix:@"https://wx.tenpay.com/cgi-bin/mmpayweb-bin/checkmweb"]) {
        //微信回调地址，微信支付完成后将通过此地址返回APP，并且需要和URL Scheme配置一样
        NSString *wxCallbackUrlStr = LAPIUrl.wechatpayRegisterUrl;
        //结尾不是... 并且包含...
        if (![absoluteString hasSuffix:[NSString stringWithFormat:@"redirect_url=%@://",wxCallbackUrlStr]] &&
            [absoluteString containsString:wxCallbackUrlStr]) {
                decisionHandler(WKNavigationActionPolicyCancel);
            
                NSString *redirectUrl = nil;
                self.wichStyle = @"weixin";
                if ([absoluteString containsString:@"redirect_url="]) {
                    NSRange redirectRange = [absoluteString rangeOfString:@"redirect_url"];
                    endPayRedirectURL =  [absoluteString substringFromIndex:redirectRange.location+redirectRange.length+1];
                    redirectUrl = [[absoluteString substringToIndex:redirectRange.location] stringByAppendingString:[NSString stringWithFormat:@"redirect_url=%@://",wxCallbackUrlStr]];
                }else {
                    redirectUrl = [absoluteString stringByAppendingString:[NSString stringWithFormat:@"&redirect_url=%@://",LHAPIUrl.wechatpayRegisterUrl]];
                }
                
                //赋值
                self.endHtmlUl = endPayRedirectURL;
                NSURL * url = [NSURL URLWithString:@"weixin://"];
                BOOL canOpen = [[UIApplication sharedApplication] canOpenURL:url];
                if (canOpen)
                {
                    
                    NSMutableURLRequest *newRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:redirectUrl] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:20];
                    newRequest.allHTTPHeaderFields = request.allHTTPHeaderFields;
                    newRequest.URL = [NSURL URLWithString:redirectUrl];
                    
                    [webView loadRequest:newRequest];
                }else {
                    [LProgressHUD showWaitingForMessage:@"请检测是否安装微信"];
                }
                return;
            }else {
            decisionHandler(WKNavigationActionPolicyAllow);
            return;
        }
    }

///额外：-- 跳转并打开其他APP
if (![scheme isEqualToString:@"https"] && ![scheme isEqualToString:@"http"]) {
        decisionHandler(WKNavigationActionPolicyCancel);
        if ([scheme isEqualToString:@"weixin"]) {
            self.wichStyle = @"weixin";
            
            if (endPayRedirectURL) {//endPayRedirectURL
                NSLog(@"取消1")
                [webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.currentHtmlUl] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:20]];
                
            }
        }else if ([scheme isEqualToString:LHAPIUrl.wechatpayRegisterUrl]) {
            self.wichStyle = @"weixin";
            
        }else if ([scheme isEqualToString:@"imeituan"]) {
            [[UIApplication sharedApplication] openURL:request.URL options:@{} completionHandler:nil];
            return;
        }
        BOOL canOpen = [[UIApplication sharedApplication] canOpenURL:request.URL];
        if (canOpen) {
            [[UIApplication sharedApplication] openURL:request.URL options:@{} completionHandler:nil];
        }
        return;
    }


    decisionHandler(WKNavigationActionPolicyAllow);
}

2、在URL Scheme设置，和上面的wxCallbackUrlStr保持一致，设置后可使用Safari测试，输入xxxxxxxxx://

3、跳转并打开其他APP需添加的白名单

<key>LSApplicationQueriesSchemes</key>
    <array>
        <string>pinduoduo</string>
        <string>weixin</string>
        <string>meituan</string>
        <string>meituanwaimai</string>
        <string>wechat</string>
        <string>weixinULAPI</string>
        <string>jdlogin</string>
        <string>openapp.jdmobile</string>
        <string>tbopen</string>
        <string>tmall</string>
        <string>alipay</string>
        <string>iosamap</string>
        <string>imeituan</string>
        <string>imeituan://</string>
    </array>