未执行带请求完成块的Swift数据任务
我有一个函数,它将一个字典发布回服务器,并在出现错误时返回状态代码或错误内容。它有时工作正常,而其余时间则跳过完成部分未执行带请求完成块的Swift数据任务,swift,http-post,nsurlsession,Swift,Http Post,Nsurlsession,我有一个函数,它将一个字典发布回服务器,并在出现错误时返回状态代码或错误内容。它有时工作正常,而其余时间则跳过完成部分 func postData(url: String, query: NSDictionary) ->NSObject? { var error: NSError? var result: NSObject? = nil let dest = NSURL("http://myUrl.com") let request = NSMutableURLR
func postData(url: String, query: NSDictionary) ->NSObject? {
var error: NSError?
var result: NSObject? = nil
let dest = NSURL("http://myUrl.com")
let request = NSMutableURLRequest(URL: dest!)
request.HTTPMethod = "POST"
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(query, options: NSJSONWritingOptions.allZeros, error: &err)
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = NSURLSession.sharedSession().dataTaskWithRequest(request){
data, response, error in
if(error != nil){
println(error)
result = error
return
}
result = (response as! NSHTTPURLResponse).statusCode
return
}
task.resume()
return result
}
我提到过,并且知道它可能是由执行时间延迟引起的。但是,由于我需要状态代码(目前为止返回nil)来确定发布后要执行的操作,我想知道如何解决这个问题?您的方法是异步方法,您无法从中获得返回 您可以传入一个块来处理带有return的操作
func postData(url: String, query: NSDictionary,finished:(NSObject)->()) {
var error: NSError?
var result: NSObject? = nil
let dest = NSURL("http://myUrl.com")
let request = NSMutableURLRequest(URL: dest!)
request.HTTPMethod = "POST"
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(query, options: NSJSONWritingOptions.allZeros, error: &err)
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = NSURLSession.sharedSession().dataTaskWithRequest(request){
data, response, error in
if(error != nil){
println(error)
result = error
return
}
finished((response as! NSHTTPURLResponse).statusCode)
}
task.resume()
}
然后使用它
postData(url, dic) { (object:NSObject) -> () in{
//use here
}
您的方法是async方法,无法从此方法获取返回 您可以传入一个块来处理带有return的操作
func postData(url: String, query: NSDictionary,finished:(NSObject)->()) {
var error: NSError?
var result: NSObject? = nil
let dest = NSURL("http://myUrl.com")
let request = NSMutableURLRequest(URL: dest!)
request.HTTPMethod = "POST"
request.HTTPBody = NSJSONSerialization.dataWithJSONObject(query, options: NSJSONWritingOptions.allZeros, error: &err)
request.addValue("application/json", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accept")
let task = NSURLSession.sharedSession().dataTaskWithRequest(request){
data, response, error in
if(error != nil){
println(error)
result = error
return
}
finished((response as! NSHTTPURLResponse).statusCode)
}
task.resume()
}
然后使用它
postData(url, dic) { (object:NSObject) -> () in{
//use here
}
谢谢!现在状态代码已成功通过。谢谢!现在,状态代码已成功传递。