支付宝问题LaunchServices: ERROR: There is no registered handler for URL scheme alipay

LaunchServices: ERROR: There is no registered handler for URL scheme alipay
（这句话其实是在告诉你 设备上没有安装 支付宝的客户端,此时会走网页端）而有人会发现并没有HTML5网页弹出过一会，会发现服务器返回4000支付失败，这可能是因为html5界面被隐藏掉了。

id<DataSigner> signer =CreateRSADataSigner(privateKey);

NSString *signedString = [signer signString:orderSpec];

//将签名成功字符串格式化为订单字符串,请严格按照该格式

NSString *orderString =nil;

if (signedString !=nil) {

orderString = [NSStringstringWithFormat:@"%@&sign=\"%@\"&sign_type=\"%@\"",

orderSpec, signedString, @"RSA"];

//需要在发送支付请求之前加上这句话

NSArray *array = [[UIApplicationsharedApplication] windows];

UIWindow* win=[arrayobjectAtIndex:0];

[win setHidden:NO];

[[AlipaySDKdefaultService]payOrder:orderStringfromScheme:appScheme callback:^(NSDictionary*resultDic)
{

NSLog(@"reslut = %@",resultDic);

NSLog(@"%@",resultDic[@"memo"]);

}];

}