Question

编辑解决方案：我怀疑reverseGeocodeLocation是异步的，所以我不得不使用

dispatch_async(
            dispatch_get_main_queue(), {
                self.newAddress = address
        })

您还必须等到newAddress变量更新才能使用它。有一些滞后但它是典型的时间，大概是一秒钟。

ORIGINAL：

当我按下地图上的注释时，我试图使用CLGeocoder().reverseGeocodeLocation中的字符串发送到另一个视图。但是处理程序存在于闭包及其Void in中。我已尝试String in，但这并不符合协议。

有没有办法可以使用闭包中的数据？

反向地理编码

 func getReversedGeocodeLocation(){
    CLGeocoder().reverseGeocodeLocation(newMeetupLocation, completionHandler: {(placemarks, error) -> Void in


        if error != nil {
            print("Reverse geocoder failed with error" + error!.localizedDescription)
            return
        }

        if placemarks != nil {
            if placemarks!.count > 0 {
                let pm = placemarks![0]
                self.name = pm.name! + "-" + pm.thoroughfare!
            }

        }
        else {
            print("Problem with the data received from geocoder")
        }
    })
}

Answer 1

这是你想要达到的目标吗？

    func getReversedGeocodeLocation(){
        CLGeocoder().reverseGeocodeLocation(newMeetupLocation, completionHandler: {(placemarks, error) -> Void in


            if error != nil {
                print("Reverse geocoder failed with error" + error!.localizedDescription)
                return
            }

            if placemarks != nil {
                if placemarks!.count > 0 {
                    let pm = placemarks![0]
                    let myAddress = pm.name! + "-" + pm.thoroughfare!
                    // just pass the address along, ie
                    self.newAddressFromGeocode(myAddress)
                }

            }
            else {
                print("Problem with the data received from geocoder")
            }
        })
    }

    func newAddressFromGeocode(address:String) {
        print(address)
        // this is called from the completion handler
        // do what you like here ie perform a segue and pass the string along
    }

Answer 2

您可以尝试这样的事情：

// add a variable outside the function. Once this is filled with the address you can pass it in your prepareForSegue
 var addresssFromPlacemark = ""

 func getReversedGeocodeLocation(){
    CLGeocoder().reverseGeocodeLocation(newMeetupLocation, completionHandler: {(placemarks, error) -> Void in


        if error != nil {
            print("Reverse geocoder failed with error" + error!.localizedDescription)
            return
        }

        if placemarks != nil {
            if placemarks!.count > 0 {
                let placemark = placemarks![0]
                var line = ""

                // Format placemark into a string
                line.addText(placemark.name)
                line.addText(placemark.subThoroughfare, withSeparator: ", ")
                if placemark.subThoroughfare != nil {
                line.addText(placemark.thoroughfare, withSeparator: " ")
                } else {
                line.addText(placemark.thoroughfare, withSeparator: ", ")
                }
                line.addText(placemark.locality, withSeparator: ", ")
                line.addText(placemark.administrativeArea, withSeparator: ", ")
                line.addText(placemark.postalCode, withSeparator: ", ")
                line.addText(placemark.country, withSeparator: ", ")
                self.addressFromPlacemark = line
            }

        }
        else {
            print("Problem with the data received from geocoder")
        }
    })
}

如何在swift中使用reverseGeocodeLocation中的数据？

2 个答案: