作者：QuinceyYang （YangQing）

一、解决UIWebView页面不能调起微信支付

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
    
    //https://wx.tenpay.com/cgi-bin/mmpayweb-bin/checkmweb?prepay_id=wx10103020268128bfe4d291131154467378&package=2397190279&redirect_url=http://www.soargift.com/parkApp/HuarunApp/orderDetail.html?parm=order_cwyd20180911001_a22
    NSString *markString = request.URL.absoluteString;
    NSLog(@"markString = %@",markString);
    
    NSDictionary *headers = [request allHTTPHeaderFields];
    BOOL hasReferer = [headers objectForKey:@"Referer"]!=nil;
    if (hasReferer) {
        // .. is this my referer?
        if ([markString containsString:@"https://wx.tenpay.com/cgi-bin/mmpayweb-bin/checkmweb"] && [markString containsString:@"http://www.soargift.com/parkApp/HuarunApp/orderDetail.html"]) {
            NSRange tmpRange = [markString rangeOfString:@"&redirect_url=http://www.soargift.com/parkApp/HuarunApp/orderDetail.html"];
            NSString *subStr1 = [markString substringToIndex:tmpRange.location];
            NSString *subStr2 = [markString substringFromIndex:tmpRange.location+14];
            [[NSUserDefaults standardUserDefaults] setObject:subStr2 forKey:@"H5PayFinishedRedirectUrl"];
            [[NSUserDefaults standardUserDefaults] synchronize];
            __weak __typeof(self)weakSelf = self;
            dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
                dispatch_async(dispatch_get_main_queue(), ^{
                    NSURL *url = [NSURL URLWithString:subStr1];
                    NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
                    [request setHTTPMethod:@"GET"];
                    [request setValue:@"www.soargift.com://" forHTTPHeaderField:@"Referer"];
                    [weakSelf.webView loadRequest:request];
                });
            });
            return NO;
        }
        return YES;
    } else {
        // relaunch with a modified request
        __weak __typeof(self)weakSelf = self;
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
            dispatch_async(dispatch_get_main_queue(), ^{
                NSURL *url = [request URL];
                NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
                [request setHTTPMethod:@"GET"];
                [request setValue:@"www.soargift.com://" forHTTPHeaderField:@"Referer"];
                [weakSelf.webView loadRequest:request];
            });
        });
        return NO;
    }
    return YES;
}

二、解决微信支付后跳回Safari问题

首先你在Xcode中，选择你的工程设置项，选中“TARGETS”一栏，在“info”标签栏的“LSApplicationQueriesSchemes“添加weixin

再在URL Types中添加

三、解决跳回APP白屏问题，并显示支付结果

在对应的视图控制器中添加

    //使用通知中心监听
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(h5PayFinishedGoback:) name:@"H5PayFinishedGoback" object:nil];


- (void)h5PayFinishedGoback:(NSNotification *)noti {
    
    NSString *redirectUrl = [[NSUserDefaults standardUserDefaults] objectForKey:@"H5PayFinishedRedirectUrl"];
    __weak __typeof(self)weakSelf = self;
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        dispatch_async(dispatch_get_main_queue(), ^{
            NSURL *url = [NSURL URLWithString:redirectUrl];
            NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
            [request setHTTPMethod:@"GET"];
            [request setValue:@"www.soargift.com://" forHTTPHeaderField:@"Referer"];
            [weakSelf.webView loadRequest:request];
        });
    });
}

在APP跳转回调接口中添加

- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation
{
    if ([url.scheme isEqualToString:@"www.soargift.com"]) {
        [[NSNotificationCenter defaultCenter] postNotificationName:@"H5PayFinishedGoback" object:nil];
        return YES;
    }    
}

End