我收到此错误此应用程序正在从后台线程修改autolayout引擎,这可能导致引擎损坏和奇怪的崩溃。这将导致将来版本中的异常。我不&# 39;不知道造成这个错误的原因。任何人都可以帮助我。
func getUserDataFromTwitterWithUser(user : PFUser)
{
//NRLoader.showLoader()
let strTwURL = "https://api.twitter.com/1.1/users/show.json? screen_name="+PFTwitterUtils.twitter()!.screenName! + "&access_token="+PFTwitterUtils.twitter()!.authToken!
let twURL = NSURL (string: strTwURL)
let request = NSMutableURLRequest(URL: twURL!, cachePolicy: NSURLRequestCachePolicy.UseProtocolCachePolicy, timeoutInterval: 2.0) as NSMutableURLRequest
PFTwitterUtils.twitter()?.signRequest(request)
let session = NSURLSession.sharedSession()
session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
if error == nil {
var jsonOptional = Dictionary<String, AnyObject>()
do {
jsonOptional = try NSJSONSerialization.JSONObjectWithData(data!, options:NSJSONReadingOptions.MutableContainers ) as! Dictionary<String, AnyObject>
// use jsonData
} catch {
// report error
}
var userName = ""
if let screenName = jsonOptional["screen_name"] as? String{
userName = screenName
}
else if let name = jsonOptional["name"] as? String{
userName = name
}
var profilePicUrl = ""
if let picUrl = jsonOptional["profile_image_url"] as? String{
profilePicUrl = picUrl
}
AppUser.currentUser()?.username = userName
AppUser.currentUser()?.profileAwsURL = profilePicUrl
//NRLoader.hideLoader()
//if ParseUtils.isLoggedInUserIsAnonymous() {
let signUpVC:SignMeUpViewController = self.storyboard!.instantiateViewControllerWithIdentifier("SignMeUpViewController") as! SignMeUpViewController
signUpVC.isFromLogin = true
self.navigationController!.pushViewController(signUpVC, animated: true)
//} else {
// self.pushToSubmitDreamViewController()
//}
}
else {
//NRLoader.hideLoader()
NRToast.showToastWithMessage(error!.description)
}
}).resume()
}
答案 0 :(得分:35)
dataTaskWithRequest
调用在后台运行,然后从同一个线程调用完成处理程序。更新UI的任何内容都应该在主线程上运行,因此所有当前的处理程序代码都应该在dispatch_async
内回到主队列中:
dispatch_async(dispatch_get_main_queue()) {
// Do stuff to UI
}
斯威夫特3:
DispatchQueue.main.async() {
// Do stuff to UI
}
因此,理想情况下,if error == nil
中当前所有代码都应该在另一个函数中关闭,例如调用handleRequest,因此您当前的代码变为:
session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
if error == nil {
dispatch_async(dispatch_get_main_queue(), {
self.handleRequest(...)I
})
}
答案 1 :(得分:16)
session.dataTaskWithRequest(request, completionHandler: {(data, response, error) in
if error == nil {
DispatchQueue.main.async {
self.handleRequest(...)I
}
}
答案 2 :(得分:7)
然后将您的UI更新代码放在主线程
中.page .entry-header {
display: none !important;
}
.site-branding {background: #000;}
答案 3 :(得分:1)
您最好只在主线程中更改UI
swift3,
let liveInfoUrl = URL(string: "http://192.168.1.66/api/cloud/app/liveInfo/7777")
let task = URLSession.shared.dataTask(with: liveInfoUrl! as URL) {data, response, error in
guard let data = data, error == nil else { return }
DispatchQueue.main.async {
print(String(data: data, encoding: String.Encoding(rawValue: String.Encoding.utf8.rawValue)) ?? "aaaa")
//do some ui work
}
}
答案 4 :(得分:0)
如果以上建议仍然没有给你带来快乐,那么最可靠的方法就是重新设计你的功能,以便获得你需要的东西
URLSession.shared.dataTask
然后移交所有在该函数外声明的变量,然后单独的UIControl(按钮,滑动等)将其显示到标签或textview或其他任何内容。
毕竟这是错误消息告诉你的。他们将问题分开了