NSScreencast Episode #104 Blur

Blur - NSScreencast

画面下から出るビューにぼかし効果を加える

• Blur
  • 50% alpha
  • see through
  • スライドするパネルの背景画像の固定など
• createPanel
  • #if USE_TOOLBAR_METHOD
  • [[UIToolbar alloc] initWithFrame:self.panel.bounds];
    • blurToolbar.barStyle = UIBarStyleBlackTranslucent;
    • blurToolbar.translucent = YES;
    • blurToolbar.alpha = 0.94;
  • #else
    • self.blurImageView.autoresizingMask = UIViewAutoresizingFlexibleHeight;
    • self.blurImageView.contentMode = UIViewContentModeBottom;
• captureBlurImage
  • UIGraphicsBeginImageContextWithOptions
  • drawViewHierarchyInRect
  • snapshot = UIGraphicsGetImageFromCurrentImageContext();
    • [snapshot applyDarkEffect];
  • save image for developing
    • UIImageJPEGRepresentation(blurImage, .70);
    • NSSearchPathForDirectoriesInDomains
    • imageData writeToFile
• UIImage+ImageEffects.m
  • Apple Dev center downloads
• 座標の調整 (background remain fix)
  • closePanel, openPanel, onDrag
  • blurFrame.size.height = self.view.frame.size.height - frame.origin.y;
• FXBlurView nicklockwood/FXBlurView · GitHub

このレベルの効果を求められることはおそらく無いと思う