支付寶回調監控，支付寶客戶端和網頁支付寶回調方式不同

支付寶客戶端回調會在AppDelegate裏面：

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *,id> *)options{
    //支付寶支付
    if ([url.host isEqualToString:@"safepay"]) {
        [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
            //利用代理監聽支付寶回調，
            if (_alipayDelegate && [_alipayDelegate respondsToSelector:@selector(getAlipayPayResult:)]) {
                [_alipayDelegate getAlipayPayResult:resultDic];
            }
            //充值回調
            if (_alipayRechargeDelegate && [_alipayRechargeDelegate respondsToSelector:@selector(getAlipayRechargeResult:)]){
                [_alipayRechargeDelegate getAlipayRechargeResult:resultDic];
            }
        }];
        return YES;
    }

 網頁支付寶回調在調起支付寶支付時：

 [[AlipaySDK defaultService] payOrder:orderString fromScheme:@"應用程序shemes" callback:^(NSDictionary *resultDic) {
                //沒有安裝支付寶，網頁支付寶回調
                [self handleAlipayWith:resultDic];
            }];