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假设我有以下代码:最佳实践添加到浏览
@IBAction func signInButtonPressed(sender: AnyObject) {
MBProgressHUD.showHUDAddedTo(self.view, animated: true)
if let url = NSURL(string: someURL) {
// ...
let task = NSURLSession.sharedSession().dataTaskWithRequest(request) {
(data, response, error) in
if let httpError = error {
dispatch_async(dispatch_get_main_queue()) {
self.alert("Error", message: "Unable to sign in: \(httpError.localizedDescription)")
}
return
}
var deserializationError: NSError?
if let jsonData = NSJSONSerialization.JSONObjectWithData(data, options: nil, error: &deserializationError) as? [String: AnyObject] {
// ...
if let error = customer.error {
dispatch_async(dispatch_get_main_queue()) {
self.alert("Error", message: error)
}
} else {
// Show other view controller
}
} else {
if let unwrappedError = deserializationError {
dispatch_async(dispatch_get_main_queue()) {
self.alert("Error", message: "Unable to sign in: \(deserializationError)")
}
}
}
}
task.resume()
} else {
if let unwrappedError = serializationError {
self.alert("Error", message: "Unable to sign in: \(serializationError)")
}
}
}
}
什么是隐藏HUD加入self.view
的正确方法?有没有更优雅的方式来做到这一点不是添加
dispatch_async(dispatch_get_main_queue()) {
MBProgressHUD.hideHUDForView(self.view, animated: true)
return
}
代码到每个if
和else
分支机构?
在此先感谢。