[英]Swift: Escaping closure How to pass values to previous ViewController after success
I am using @escaping closure to run functions All i want to pass the success dictionary to my previous ViewController to use its data.我正在使用 @escaping 闭包来运行函数 我想将成功字典传递给我以前的 ViewController 以使用它的数据。 Here is my code
这是我的代码
func addToCart(vc:UIViewController, param:[String:String], completionHandler:@escaping (_ success:Bool, _ errorC : Error?, _ stock_flag : Bool?) -> Void)
{
WebServiceHelper.sharedInstanceAPI.hitPostAPI(urlString: KeyConstant.APIAddCart, params: pramaTemp, completionHandler: { (result: [String:Any], err:Error?) in
print(result)
MBProgress().hideIndicator(view: vc.view)
if(!(err == nil))
{
completionHandler(false,err, false)
return
}
let json = JSON(result)
let statusCode = json["status"].string
print(json)
if(statusCode == "success")
{
print(result)
completionHandler(true,err,true)
}
else
{
if(json["stock_flag"].string == "0")
{
completionHandler(false,err,false)
}
else if(json["stock_flag"].int == 0)
{
completionHandler(false,err,false)
}
else
{
completionHandler(false,err,true)
}
}
})
}
I got Success in response.我得到了 Success 的回应。 Please guide me how i pass the result data to my previous
ViewController
.请指导我如何将结果数据传递给我以前的
ViewController
。
I am using this code to navigate to model view where i am using the above code我正在使用此代码导航到我使用上述代码的模型视图
CartViewModel().addToCart(vc: self, param:params ) { (isDone:Bool, error:Error?, stock_flag:Bool?) in
You could add the dictionary to your success closure like this:您可以将字典添加到您的成功闭包中,如下所示:
func addToCart(vc:UIViewController, param:[String:String], completionHandler:@escaping (_ success:Bool, _ errorC : Error?, _ stock_flag : Bool?, result: [String:Any]?) -> Void)
{ ... }
Afterwards you can just use it in the closure.之后你可以在闭包中使用它。
CartViewModel().addToCart(vc: self, param:params ) { (isDone, error, stock_flag, result) in
// Use result here
}
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