ios - 搜索栏搜索时启动指示器

Question

我需要创建一个搜索栏来搜索产品。为此，我使用 searchcontroller 并且有一个用于按名称搜索产品的 api。我想要这个:从 api 搜索时处理指示器的动画。我该如何解决这个问题？这是我从 api 搜索的代码:

func getTovar(){

    Alamofire.request(.GET, "myApiurl")
        .responseJSON { response in
            guard response.result.error == nil else {
                // got an error in getting the data, need to handle it
                print("error calling GET on /todos/1")
                print(response.result.error!)
                self.indicator.stopAnimating()
                UIApplication.sharedApplication().networkActivityIndicatorVisible = false

                return
            }

            if let value = response.result.value {
                // handle the results as JSON, without a bunch of nested if loops
                let product = JSON(value)
                for (_,subJson):(String, JSON) in product {

                    let img:NSData
                    if let src=subJson["sphoto"].string{

                        if src.containsString("jpg"){
                            let range = src.startIndex.advancedBy(2)..<src.endIndex
                            let substring = src[range]
                            var urlString = "http://admin.unimax.kz/\(substring)"
                            urlString = urlString.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
                            if let dataFromURL=NSData(contentsOfURL: NSURL(string: urlString)!){
                                img=dataFromURL
                            }
                            else{
                                img=NSData(contentsOfURL: NSURL(string: "http://zhaksy-adam.kz/Images/domalak.png")!)!
                            }
                        }
                        else{
                            img=NSData(contentsOfURL: NSURL(string: "http://zhaksy-adam.kz/Images/domalak.png")!)!
                        }
                    }
                    else{
                        img=NSData(contentsOfURL: NSURL(string: "http://zhaksy-adam.kz/Images/domalak.png")!)!
                    }

                    //Do something you want
                    let id=subJson["id"].int!
                    let name=subJson["name"].string!
                    let price=subJson["price"].int!
                    let description=subJson["description"].rawString()
                    self.data.append(Product(id:id,title: name, img: UIImage(data: img), price: price,desc:description!))
                }
            }
    }
}

这是我更新的搜索结果:

func updateSearchResultsForSearchController(searchController: UISearchController)
{
    searchController.searchBar.addSubview(indicator)
    indicator.stopAnimating()

    getTovar()

    for item in data {
        if item.productTitle.containsString(searchController.searchBar.text!){
            filteredTableData.append(item)
        }
    }

    indicator.stopAnimating()
    self.tableView.reloadData()
}

Answer 1

您需要像这样更改代码像这样改变你的 getTover

func getTovar(){

    Alamofire.request(.GET, "myApiurl")
        .responseJSON { response in
            guard response.result.error == nil else {
                // got an error in getting the data, need to handle it
                print("error calling GET on /todos/1")
                print(response.result.error!)
                self.indicator.stopAnimating()
                UIApplication.sharedApplication().networkActivityIndicatorVisible = false
                indicator.stopAnimationg()
                return
            }

            if let value = response.result.value {
                // handle the results as JSON, without a bunch of nested if loops
                let product = JSON(value)
                for (_,subJson):(String, JSON) in product {

                    let img:NSData
                    if let src=subJson["sphoto"].string{

                        if src.containsString("jpg"){
                            let range = src.startIndex.advancedBy(2)..<src.endIndex
                            let substring = src[range]
                            var urlString = "http://admin.unimax.kz/\(substring)"
                            urlString = urlString.stringByAddingPercentEncodingWithAllowedCharacters(NSCharacterSet.URLQueryAllowedCharacterSet())!
                            if let dataFromURL=NSData(contentsOfURL: NSURL(string: urlString)!){
                                img=dataFromURL
                            }
                            else{
                                img=NSData(contentsOfURL: NSURL(string: "http://zhaksy-adam.kz/Images/domalak.png")!)!
                            }
                        }
                        else{
                            img=NSData(contentsOfURL: NSURL(string: "http://zhaksy-adam.kz/Images/domalak.png")!)!
                        }
                    }
                    else{
                        img=NSData(contentsOfURL: NSURL(string: "http://zhaksy-adam.kz/Images/domalak.png")!)!
                    }

                    //Do something you want
                    let id=subJson["id"].int!
                    let name=subJson["name"].string!
                    let price=subJson["price"].int!
                    let description=subJson["description"].rawString()
                    self.data.append(Product(id:id,title: name, img: UIImage(data: img), price: price,desc:description!))
                }
                indicator.stopAnimationg()
                for item in data {
                    if item.productTitle.containsString(searchController.searchBar.text!){
                        filteredTableData.append(item)
                    }
                }
                self.tableView.reloadData()
            }
    }
}

并像这样更改 updateSearchResultsForSearchController

 func updateSearchResultsForSearchController(searchController: UISearchController){
     searchController.searchBar.addSubview(indicator)
     indicator.startAnimating()
      getTovar()
 }

希望这会有所帮助。