ユーザーエクスペリエンスの低下を引き起こすコンポーネントの初期化が遅い

Question

これは、前のビューでボタンをクリックしたときに表示されるビューです。 テキストボックス、笑顔の画像、およびラベルは、xCodeによって作成されたあらかじめデザインされています。

ビューのコンポーネントが非常にゆっくりと初期化され、完全に読み込まれたときに最後に撮影される準備が整っている理由を確認するには、ビューのイメージとコードを参照してください。また、文字を入力すると非常に遅いですが、iOSがテキストボックスをタッチするたびに入力するキーボードで入力中に文字が非常にゆっくりと表示されます。

ビューのコード;

using System; 
using System.Drawing; 

using MonoTouch.Foundation; 
using MonoTouch.UIKit; 

namespace IstanbulCity 
{ 
    public partial class AskForNAme : UIViewController 
    { 
     public delegate void AskForNAmeClosingDelegate (AskForNAme form); 

     public event AskForNAmeClosingDelegate AskForNAmeClosed; 
     NSObject obs1; 
     float scrollamount = 0.0f; 
     float bottomPoint = 0.0f; 
     float yOffset = 0.2f; 
     bool moveViewUp = false; 

     public AskForNAme() : base ("AskForNAme", null) 
     { 


     } 

     public override void DidReceiveMemoryWarning() 
     { 
      // Releases the view if it doesn't have a superview. 
      base.DidReceiveMemoryWarning(); 

      // Release any cached data, images, etc that aren't in use. 
     } 

     public override void ViewDidLoad() 
     { 
      base.ViewDidLoad(); 


      // Perform any additional setup after loading the view, typically from a nib. 
     } 
     public override void ViewDidAppear(bool animated) 
     { 
      base.ViewDidAppear(true); 
       obs1 = NSNotificationCenter.DefaultCenter.AddObserver (
"UIKeyboardDidShowNotification", KeyboardUpNotification); 
      this.tbOwnerMailAdress.ShouldReturn += TextFieldShouldReturn; 
      this.tbOwnerBirthDay.ShouldReturn += TextFieldShouldReturn; 
      this.uivGuguPhoto.Image = UIImage.FromFile ("image/fcuk.jpeg"); 

     } 
     public override void ViewWillAppear(bool animated) 
     { 
      base.ViewWillAppear(false); 
      obs1 = NSNotificationCenter.DefaultCenter.AddObserver (
"UIKeyboardDidShowNotification", KeyboardUpNotification); 
      this.tbOwnerMailAdress.ShouldReturn += TextFieldShouldReturn; 
      this.tbOwnerBirthDay.ShouldReturn += TextFieldShouldReturn; 
      this.uivGuguPhoto.Image = UIImage.FromFile ("image/fcuk.jpeg"); 

     } 
     public override void ViewDidUnload() 
     { 
      base.ViewDidUnload(); 

      // Clear any references to subviews of the main view in order to 
      // allow the Garbage Collector to collect them sooner. 
      // 
      // e.g. myOutlet.Dispose(); myOutlet = null; 

      ReleaseDesignerOutlets(); 
     } 

     public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation) 
     { 
      // Return true for supported orientations 
      return (toInterfaceOrientation != UIInterfaceOrientation.PortraitUpsideDown); 
     } 

     void HandleIstanbulCityViewControllerClosed (babyAge form) 
     { 
      form.DismissModalViewControllerAnimated (true); 
      form = null; 
     } 



     partial void tbKadikoyHallEditDidEndOnExit (MonoTouch.Foundation.NSObject sender) 
     { 
      tbIstanbulName.ResignFirstResponder(); 
     } 



     private bool TextFieldShouldReturn (UITextField tf) 
     { 
      tf.ResignFirstResponder(); 
      if (moveViewUp) { 
       ScrollTheView (false); 
      } 
      return true; 
     } 

     private void KeyboardUpNotification (NSNotification notification) 
     { 
      ResetTheView(); 

      RectangleF r = UIKeyboard.BoundsFromNotification (notification); 

      if (this.tbOwnerMailAdress.IsEditing) { 
       //Calculate the bottom of the Texbox 
       //plus a small margin... 
       bottomPoint = (this.tbOwnerMailAdress.Frame.Y + this.tbOwnerMailAdress.Frame.Height + yOffset); 

       //Calculate the amount to scroll the view 
       //upwards so the Textbox becomes visible... 
       //This is the height of the Keyboard - 
       //(the height of the display - the bottom 
       //of the Texbox)... 
       scrollamount = (r.Height - (View.Frame.Size.Height - bottomPoint)); 
      } 
      else if (this.tbOwnerBirthDay.IsEditing) 
      { 
       bottomPoint = (this.tbOwnerBirthDay.Frame.Y + this.tbOwnerBirthDay.Frame.Height + yOffset); 
       scrollamount = (r.Height - (View.Frame.Size.Height - bottomPoint)); 
      } 
      else 
      { 
       scrollamount = 0; 
      } 

      //Check to see whether the view 
      //should be moved up... 
      if (scrollamount > 0) { 
       moveViewUp = true; 
       ScrollTheView (moveViewUp); 
      } else 
       moveViewUp = false; 
     } 

     private void ResetTheView() 
     { 
      UIView.BeginAnimations (string.Empty, System.IntPtr.Zero); 
      UIView.SetAnimationDuration (0.3); 

      RectangleF frame = View.Frame; 
      frame.Y = 0; 
      View.Frame = frame; 
      UIView.CommitAnimations(); 
     } 

     private void ScrollTheView (bool movedUp) 
     { 
//To invoke a views built-in animation behaviour, 
//you create an animation block and 
//set the duration of the move... 
//Set the display scroll animation and duration... 
      UIView.BeginAnimations (string.Empty, System.IntPtr.Zero); 
      UIView.SetAnimationDuration (0.3); 

//Get Display size... 
      RectangleF frame = View.Frame; 

      if (movedUp) { 
//If the view should be moved up, 
//subtract the keyboard height from the display... 
       frame.Y -= scrollamount; 
      } else { 
//If the view shouldn't be moved up, restore it 
//by adding the keyboard height back to the original... 
       frame.Y += scrollamount; 
      } 

//Assign the new frame to the view... 
      View.Frame = frame; 

//Tell the view that your all done with setting 
//the animation parameters, and it should 
//start the animation... 
      UIView.CommitAnimations(); 

     } 
    } 
} 

最近のバージョン - まだ同じユーザーエクスペリエンスが」遅いです！

using System; 
using System.Drawing; 

using MonoTouch.Foundation; 
using MonoTouch.UIKit; 

namespace IstanbulCity 
{ 
    public partial class AskForNAme : UIViewController 
    { 
     public delegate void AskForNAmeClosingDelegate (AskForNAme form); 

     public event AskForNAmeClosingDelegate AskForNAmeClosed; 


     public AskForNAme() : base ("AskForNAme", null) 
     { 


     } 

     public override void DidReceiveMemoryWarning() 
     { 
      // Releases the view if it doesn't have a superview. 
      base.DidReceiveMemoryWarning(); 

      // Release any cached data, images, etc that aren't in use. 
     } 

     public override void ViewDidLoad() 
     { 
      base.ViewDidLoad(); 


      // Perform any additional setup after loading the view, typically from a nib. 
     } 


     public override void ViewDidUnload() 
     { 
      base.ViewDidUnload(); 

      // Clear any references to subviews of the main view in order to 
      // allow the Garbage Collector to collect them sooner. 
      // 
      // e.g. myOutlet.Dispose(); myOutlet = null; 

      ReleaseDesignerOutlets(); 
     } 

     public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation) 
     { 
      // Return true for supported orientations 
      return (toInterfaceOrientation != UIInterfaceOrientation.PortraitUpsideDown); 
     } 

     void HandleIstanbulCityViewControllerClosed (babyAge form) 
     { 
      form.DismissModalViewControllerAnimated (true); 
      form = null; 
     } 







    } 
} 

Answer 1

これは初期化関連ではありません。 ViewDidAppearとViewWillAppearの両方の通知を追加しています。 常にであり、アニメーションはすべてのキーボード通知（何も変更されていなくても）で呼び出されます。ResetTheView

私の推測では、ResetTheViewの方がより頻繁に呼び出していると思います。連続したアニメーションは、アプリケーションのパフォーマンスを殺しています。

これは、メソッドにConsole.WriteLineとカウンタを入れて確認できます。