I'm new to swift and I don't understand how to initialize a class.
我是swift的新手,我不知道如何初始化一个类。
Succeeded is initialized in the class definition as false
在类定义中,success被初始化为false
if (succeeded && (time>1000)){
errormessage += ";connection slow"
}
Time is initialized as
时间初始化
time = data[3].toInt()
Where data is
数据在哪里
var data = split(raw_data) {$0 == ","}
And raw_data
is a string.
而raw_data是一个字符串。
Class Definition:
类定义:
class geocodeObject: NSObject {
init
definition:
初始化定义:
init(lat: String,long:String,userstate:String) {
(no super init of any kind) EDIT: Full code with things cut way
(没有任何类型的超级init)编辑:完整的代码和东西剪切方式
class geocodeObject: NSObject {
//A type to store the data from the Reverse Geocoding API
//Not a retriever
//Options
let API_KEY_TEXAS = "9e4797c018164fdcb9a95edf3b10ccfc"
let DEV_MODE = true
//Loading status
var succeeded = false
var errormessage = "Not Initalized" //Not nesscarilly a failure, could be slow connection
var loadstate: String?
//Most important info
var street: String?; var housenumber: String?; var city: String?; var zip: String?
//Metadata
var time: IntegerLiteralType?; var statuscode: String?; var queryid: String?; var zip4: String?
//Other geographical data
var entirestreet: String?; var state: String?
init(lat: String,long:String,userstate:String) {
//userstate: State provided by user
//state: State provided by Reverse Geocoder
var url: String?
var extra: String?
if DEV_MODE{
extra = "¬Store=true"
}
else{
extra = ""
}
url = "http://geoservices.tamu.edu/Services/ReverseGeocoding/WebService/v04_01/HTTP/default.aspx?lat="+lat+"&lon="+long+"&apikey="+API_KEY_TEXAS+"&version=4.01"
if (userstate == "nil"){
url = url! + extra!
println("if")
}
else{
url = url! + "&state="+state!+extra!
println("else")
}
let raw_data = retrieveurl(url!)
var data = split(raw_data) {$0 == ","}
//data[1] is API version used.
statuscode = data[0]; queryid = data[2]; time = data[3].toInt(); entirestreet = data[4]; city = data[5]
state = data[6]; zip = data[7]; zip4 = data[8]
//Do street, housenumber, errormessage, succeeded
if (state != userstate){
println("user state not equal to state")
}
var splittedstreet = split(entirestreet!){$0 == " "}
housenumber = splittedstreet[0]
street = splittedstreet[1]
println(statuscode)
//Error message handling
switch String(statuscode!){
case "200":
errormessage = "Success"
case "400":
errormessage = "Unknown API key error"
case "401":
...
//Time handling
if (succeeded && (time>1000)){
errormessage += ";connection slow"
}
}
println("/GeocodingAPIWrapper.swift/.geocodeObject.init: Not Implemented")
}
}
}
3 个解决方案
#1
16
It had been a while but the answer I found is that you should add super.init() as the first line inside your init block
已经有一段时间了,但是我找到的答案是您应该将super.init()添加为init块中的第一行
init(lat: String,long:String,userstate:String) {
super.init()
...
This way I got rid of it and fulfills what the error is asking for. As I understand this is that your variables are initialized during NSObject.init() so you can use assigned values inside your custom init(_) block
这样我就摆脱了它,并满足了错误的要求。正如我所理解的,您的变量在NSObject.init()中初始化,因此您可以在自定义的init(_)块中使用赋值
#2
22
Swift 2.2 (still beta as of writing) currently displays this error if you accidentally forget to return nil
from a guard
's else
:
如果您不小心忘记从一个警卫的else中返回nil,那么Swift 2.2(仍然是beta版本)当前将显示此错误:
required init?(dictionary: [String: AnyObject]) {
guard let someValue = dictionary["someValue"] as? Bool else { return /*nil*/ } //Nil should not be commented here
self.someValue = someValue
super.init(dictionary: dictionary) //`self` used before super.init call
}
Hopefully this helps someone
希望这可以帮助别人
#3
-2
Use:
使用:
var obj = geocodeObject(lat: "0.0",long:"0.0",userstate:"aaa")
var obj = geocodeObject(lat:“0.0”,long:“0.0”,userstate:“aaa”)
#1
16
It had been a while but the answer I found is that you should add super.init() as the first line inside your init block
已经有一段时间了,但是我找到的答案是您应该将super.init()添加为init块中的第一行
init(lat: String,long:String,userstate:String) {
super.init()
...
This way I got rid of it and fulfills what the error is asking for. As I understand this is that your variables are initialized during NSObject.init() so you can use assigned values inside your custom init(_) block
这样我就摆脱了它,并满足了错误的要求。正如我所理解的,您的变量在NSObject.init()中初始化,因此您可以在自定义的init(_)块中使用赋值
#2
22
Swift 2.2 (still beta as of writing) currently displays this error if you accidentally forget to return nil
from a guard
's else
:
如果您不小心忘记从一个警卫的else中返回nil,那么Swift 2.2(仍然是beta版本)当前将显示此错误:
required init?(dictionary: [String: AnyObject]) {
guard let someValue = dictionary["someValue"] as? Bool else { return /*nil*/ } //Nil should not be commented here
self.someValue = someValue
super.init(dictionary: dictionary) //`self` used before super.init call
}
Hopefully this helps someone
希望这可以帮助别人
#3
-2
Use:
使用:
var obj = geocodeObject(lat: "0.0",long:"0.0",userstate:"aaa")
var obj = geocodeObject(lat:“0.0”,long:“0.0”,userstate:“aaa”)