在看這篇文章之前巢价，相信大家對(duì)集成支付寶SDK實(shí)現(xiàn)客戶端支付已經(jīng)很熟悉了，這里就不啰嗦了官疲。下面要解決的是如何在不集成支付寶SDK的情況下耀怜，使用H5加載支付寶支付鏈接直接打開支付寶進(jìn)行支付，并且在支付完成之后跳回APP的問(wèn)題茶宵。
上面的文章的思路是使用WKWebView攔截 alipay://alipayclient 請(qǐng)求危纫，追加或修改參數(shù) fromAppUrlScheme為你自己的URLScheme值，生成新的NSURL乌庶，然后用 [[UIApplication sharedApplication] openURL:] 打開即可种蝶，但是關(guān)于如何追加或修改參數(shù)fromAppUrlScheme，文章中沒(méi)有提到瞒大。
我的想法是攔截之后先使用正則匹配螃征，然后判斷是否包含fromAppUrlScheme參數(shù)，如果包含替換掉參數(shù)的值糠赦，如果不包含就自己生成然后插入会傲。
代碼如下：
// WKWebView代理
// 如果不添加這個(gè)唇辨，那么WKWebview無(wú)法跳轉(zhuǎn)
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
WKNavigationActionPolicy actionPolicy = WKNavigationActionPolicyAllow;
//允許
NSString *urlString = [[navigationAction.request URL] absoluteString];
urlString = [urlString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
//判斷是否是支付寶連接
if ([urlString hasPrefix:@"alipay://alipayclient/?"]||
[urlString hasPrefix:@"alipays://alipayclient/?"]){
[self openAlipayWithURLString:urlString];
}
//這句是必須加上的赊瞬，不然會(huì)異常
decisionHandler(actionPolicy);
}
- (void)openAlipayWithURLString:(NSString *)urlString{
NSString *regex = @"\"fromAppUrlScheme\":\"\\w+\"";
//要替換的
NSString *replacement = @"\"fromAppUrlScheme\":\"你的UrlScheme\"";
NSRegularExpression *regularExpression = [NSRegularExpression regularExpressionWithPattern:regex
options:NSRegularExpressionCaseInsensitive
error:nil];
NSInteger count = [regularExpression numberOfMatchesInString:urlString
options:NSMatchingReportProgress
range:NSMakeRange(0, urlString.length)];
NSURL *payURL;
if (count > 0) {//如果包含诈胜，就替換掉
NSString *resultStr = urlString;
// 替換匹配的字符串
resultStr = [regularExpression stringByReplacingMatchesInString:urlString
options:NSMatchingReportProgress
range:NSMakeRange(0, urlString.length)
withTemplate:replacement];
NSString *payUrlStr = [resultStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
payURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@",payUrlStr]];
}
else{//如果不包含，就插入
NSString *replaceStr = @",\"fromAppUrlScheme\":\"你的UrlScheme\"}";
//獲取最后一個(gè)字符串
NSString *lastStr = [urlString substringFromIndex:urlString.length - 1];
//替換
NSString *resultStr = [urlString stringByReplacingOccurrencesOfString:lastStr withString:replaceStr];
NSString *payUrlStr = [resultStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
payURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@",payUrlStr]];
}
//跳轉(zhuǎn)支付寶
if (@available(iOS 10.0, *)) {
[[UIApplication sharedApplication] openURL:payURL options:@{} completionHandler:nil];
}
else {
[[UIApplication sharedApplication] openURL:payURL];
}
}
