StackOverflow2013

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copied!<p>I began on QTMovieLayer, but being less powerfull (of course) than QTMovieView it opened another box of issues. The solution was to use NSAnimation on the QTMovieView. I have a NSAnimation class looking somewhat like this:</p> <p><strong>AlphaAnimation.h</strong></p> <pre><code> #import <Cocoa/Cocoa.h> NSString * const AAFadeIn; NSString * const AAFadeOut; @interface AlphaAnimation : NSAnimation { NSView *animatedObject; NSString *effect; } - (id)initWithDuration:(NSTimeInterval)duration effect:(NSString *)effect object:(NSView *)object; @end </code></pre> <p><strong>AlphaAnimation.m</strong></p> <pre><code> #import "AlphaAnimation.h" NSString * const AAFadeIn = @"AAFadeIn"; NSString * const AAFadeOut = @"AAFadeOut"; @implementation AlphaAnimation - (id)initWithDuration:(NSTimeInterval)aDuration effect:(NSString *)anEffect object:(NSView *)anObject { self = [super initWithDuration:aDuration animationCurve:0]; if (self) { animatedObject = anObject; effect = anEffect; } return self; } - (void)setCurrentProgress:(NSAnimationProgress)progress { if ([effect isEqual:AAFadeIn]) [animatedObject setAlphaValue:progress]; else [animatedObject setAlphaValue:1 - progress]; } @end </code></pre> <p>Which can then be used like this:</p> <pre><code>animation = [[AlphaAnimation alloc] initWithDuration:0.5 effect:AAFadeIn object:movieView]; [animation setAnimationBlockingMode:NSAnimationNonblocking]; [animation startAnimation]; </code></pre> <p>If your QTMovieViews are in full screen it isn't very smooth, though.</p>

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