把swift的代码中的http请求换成异步的：
func getUrlRespJsonDict_async(url:String, extraParas:AnyObject?, respJsonDictHandler:((Bool, AnyObject?, JSON) -> Void)) {
print("url=\(url)")
var getJsonOk:Bool = false
let params:Dictionary<String, AnyObject>? = nil
do {
let opt = try HTTP.GET(
url,
parameters: params,
requestSerializer: JSONParameterSerializer())
opt.start { response in
if let err = response.error {
print("url=\(url) with params=\(params) response error= \(err.localizedDescription)")
getJsonOk = false
let errJsonDict = JSON(["error" : err.localizedDescription])
respJsonDictHandler(getJsonOk, extraParas, errJsonDict)
return
}
//print("response.statusCode=\(response.statusCode)")
//print("opt finished: \(response.description)")
let decodedJsonDict:JSON = JSON(data: response.data)
print("decodedJsonDict=\(decodedJsonDict)")
getJsonOk = true
respJsonDictHandler(getJsonOk, extraParas, decodedJsonDict)
}
} catch let httpGetError {
print("url=\(url) with params=\(params) got error= \(httpGetError)")
getJsonOk = false
let errJsonDict = JSON(["error" : "\(httpGetError)"])
respJsonDictHandler(getJsonOk, extraParas, errJsonDict)
}
}
func contactIdListJsonDictHandler(getJsonOk:Bool, extraParas:AnyObject?, respJsonDict:JSON){
if getJsonOk {
var contactIdList:[String] = [String]()
contactIdList = respJsonDict.arrayObject as! [String]
print("contactIdList=\(contactIdList)") //
let userTeamInfoDict:[String:String] = extraParas as! [String:String]
let userIdStr:String = userTeamInfoDict["userIdStr"]! as String
let teamIdStr:String = userTeamInfoDict["teamIdStr"]! as String
let totalContactNum:Int = contactIdList.count
for eachContactIdStr in contactIdList {
let getContactInfoUrl:String = StrServerUrl + "/user/" + userIdStr + "/teams/joined/" + teamIdStr + "/members/" + eachContactIdStr
print("getContactInfoUrl=\(getContactInfoUrl)") //http://192.168.1.110:8080/user/user-7aa7e3c3-bf8f-46e1-8cbe-3a5aad6e9dfb/teams/joined/team-b6c09caa-4e08-48d7-a415-ef1f69f8c588/members/user-22719dc9-7f4b-47ab-807d-9b2146b1344a
getUrlRespJsonDict_async(getContactInfoUrl, extraParas: totalContactNum, respJsonDictHandler: singleContactItemJsonDictHandler)
}
}
}
func singleContactItemJsonDictHandler(getJsonOk:Bool, extraParas:AnyObject?, respJsonDict:JSON?){
if getJsonOk {
var singleContactItem:ContactItem = ContactItem()
singleContactItem.nameStr = respJsonDict!["name"].string!
//singleContactItem.phoneNumberStr = respJsonDict!["phone"].stringValue
print("singleContactItem=\(singleContactItem)")
insertContactItemToList(singleContactItem)
//TODO: reload tableview data for each contact item ?
let totalContactNum:Int = extraParas as! Int
if getCurTotalContactItemNum() >= totalContactNum {
//reload contact tableView
print("gContactViewController=\(gContactViewController)")
print("gContactViewController.contactTableView=\(gContactViewController!.contactTableView)")
//gContactViewController?.contactTableView.reloadData()
gContactViewController!.contactTableView.reloadData()
}
}
}之后，经常遇到如下问题：
希望是
调用了：
gContactViewController!.contactTableView.reloadData()
后，联系人列表，会刷新为：
但是
此处，经常遇到：
reloadData没生效，而联系人列表是旧的内容：
而没有刷新。
搜：
swift tableview reloaddata sometime not work
swift async tableview reloaddata sometime not work
参考：
去试试：
dispatch_async(dispatch_get_main_queue(), { () -> Void in
//gContactViewController?.contactTableView.reloadData()
gContactViewController!.contactTableView.reloadData()
})然后真的可以了，正常，立刻，及时的刷新数据，页面上的联系人保持最新的值。
［总结］