スクロールビューに、コンテンツを含むビューをdocumenViewとして追加し、このコードを使用してdocumentViewをフェードアウトします。
- (IBAction)deleteAllRules:(id)sender {
NSViewAnimation * deleteListOfRulesViewAnimation;
NSRect viewRect;
NSMutableDictionary* animDict;
// Create the attributes dictionary
animDict = [NSMutableDictionary dictionaryWithCapacity:3];
viewRect = listOfRulesView.frame;
// Specify which view to modify.
[animDict setObject:listOfRulesView forKey:NSViewAnimationTargetKey];
// Specify the starting position of the view.
[animDict setObject:[NSValue valueWithRect:viewRect] forKey:NSViewAnimationStartFrameKey];
// Shrink the view from its current size to nothing.
NSRect viewZeroSize = listOfRulesView.frame;
viewZeroSize.size.width = 0;
viewZeroSize.size.height = 0;
[animDict setObject:[NSValue valueWithRect:viewZeroSize] forKey:NSViewAnimationEndFrameKey];
// Set this view to fade out
[animDict setObject:NSViewAnimationFadeOutEffect forKey:NSViewAnimationEffectKey];
// Create the view animation object.
deleteListOfRulesViewAnimation = [[NSViewAnimation alloc] initWithViewAnimations:[NSArray
arrayWithObjects:animDict, nil]];
// Set some additional attributes for the animation.
[deleteListOfRulesViewAnimation setDuration:1.5]; // One and a half seconds.
[deleteListOfRulesViewAnimation setAnimationCurve:NSAnimationEaseIn];
[deleteListOfRulesViewAnimation setDelegate:self];
// Run the animation.
[deleteListOfRulesViewAnimation startAnimation];
// The animation has finished, so go ahead and release it.
[deleteListOfRulesViewAnimation release];
}
ただし、フェードアウト効果なしで非表示を表示します。なんで?