iOS客户端实现嵌入H5进行支付跳转到客户端，支付完成后再跳转回我们的APP,解决WKWebView无法跳转回APP的BUG.
一.支付宝
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
NSURLRequest *request = navigationAction.request;
NSString *scheme = [request.URL scheme];
// decode for all URL to avoid url contains some special character so that it wasn't load.
NSString *absoluteString = [navigationAction.request.URL.absoluteString stringByRemovingPercentEncoding];
NSLog(@"Current URL is %@",absoluteString);
static NSString *endPayRedirectURL = nil;
// 跳转到本地某宝App
if ([absoluteString hasPrefix:@"alipays://"] || [absoluteString hasPrefix:@"alipay://"])
{
NSURL *openedURL = navigationAction.request.URL;
NSString *prefixString = @"alipay://alipayclient/?";
NSString *urlString = [[self xh_URLDecodedString:absoluteString] stringByReplacingOccurrencesOfString:@"alipays" withString:@"自定义scheme"];
;
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;
}
decisionHandler(WKNavigationActionPolicyAllow);
}
- (NSString *)xh_URLDecodedString:(NSString *)urlString
{
NSString *string = urlString;
NSString *decodedString=(__bridge_transfer NSString *)CFURLCreateStringByReplacingPercentEscapesUsingEncoding(NULL, (__bridge CFStringRef)string, CFSTR(""), CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding));
return decodedString;
}
- (NSString *)xh_URLEncodedString:(NSString *)urlString
{
NSString *string = urlString;
NSString *encodedString = (NSString *) CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
(CFStringRef)string,
NULL,
(CFStringRef)@"!*'();:@&=+$,/?%#[]",
kCFStringEncodingUTF8));
return encodedString;
}
二.微信
1.在项目的Info.plist中添加一个URL Schemes（用于跳回我们项目），如下图所示
5086522-dfc3a3260a4fde44.png
2.添加WKNavigationDelegate代理，并实现重定向代理方法，通过拦截微信链接以实现跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
NSURLRequest *request = navigationAction.request;
NSString *scheme = [request.URL scheme];
// decode for all URL to avoid url contains some special character so that it wasn't load.
NSString *absoluteString = [navigationAction.request.URL.absoluteString stringByRemovingPercentEncoding];
NSLog(@"Current URL is %@",absoluteString);
static NSString *endPayRedirectURL = nil;
// Wechat Pay, Note : modify redirect_url to resolve we couldn't return our app from wechat client.
if ([absoluteString hasPrefix:@"https://wx.tenpay.com/cgi-bin/mmpayweb-bin/checkmweb"] && ![absoluteString hasSuffix:[NSString stringWithFormat:@"redirect_url=%@%@://",kSchemePrefix,CompanyFirstDomainByWeChatRegister]]) {
decisionHandler(WKNavigationActionPolicyCancel);
#warning Note : The string "xiaodongxie.cn://" must be configured by wechat background. It must be your company first domin. You also should configure "URL types" in the Info.plist file.
// 1. If the url contain "redirect_url" : We need to remember it to use our scheme replace it.
// 2. If the url not contain "redirect_url" , We should add it so that we will could jump to our app.
// Note : 2. if the redirect_url is not last string, you should use correct strategy, because the redirect_url's value may contain some "&" special character so that my cut method may be incorrect.
NSString *redirectUrl = nil;
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=%@%@://",kSchemePrefix,CompanyFirstDomainByWeChatRegister]];
}else {
redirectUrl = [absoluteString stringByAppendingString:[NSString stringWithFormat:@"&redirect_url=%@%@://",kSchemePrefix,CompanyFirstDomainByWeChatRegister]];
}
NSMutableURLRequest *newRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:redirectUrl] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:XDX_URL_TIMEOUT];
newRequest.allHTTPHeaderFields = request.allHTTPHeaderFields;
newRequest.URL = [NSURL URLWithString:redirectUrl];
[webView loadRequest:newRequest];
return;
}
// Judge is whether to jump to other app.
if (![scheme isEqualToString:@"https"] && ![scheme isEqualToString:@"http"]) {
decisionHandler(WKNavigationActionPolicyCancel);
if ([scheme isEqualToString:@"weixin"]) {
// The var endPayRedirectURL was our saved origin url's redirect address. We need to load it when we return from wechat client.
if (endPayRedirectURL) {
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:endPayRedirectURL] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:XDX_URL_TIMEOUT]];
}
}else if ([scheme isEqualToString:[NSString stringWithFormat:@"%@%@",kSchemePrefix,CompanyFirstDomainByWeChatRegister]]) {
}
// BOOL canOpen = [[UIApplication sharedApplication] canOpenURL:request.URL];
// if (canOpen) {
// [[UIApplication sharedApplication] openURL:request.URL];
// }
if ([navigationAction.request.URL.absoluteString hasPrefix:@"weixin://"]) {
[[UIApplication sharedApplication] openURL:navigationAction.request.URL];
}
return;
}
decisionHandler(WKNavigationActionPolicyAllow);
}
注：kSchemePrefix 自定义前缀，可任意填写
CompanyFirstDomainByWeChatRegister 微信一级域名
XDX_URL_TIMEOUT 超时时间
参考：https://www.jianshu.com/p/66d2c0ff51c6