我想为NSView添加CATransition动画。我有以下代码:CIFilter的CATransition不能正常工作,第二次工作
[contentView setWantsLayer:YES];
NSRect rect = [contentView bounds];
NSData *shadingBitmapData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"restrictedshine" ofType:@"tiff"]]; // took from Apple's example
NSBitmapImageRep *shadingBitmap = [[[NSBitmapImageRep alloc] initWithData:shadingBitmapData] autorelease];
CIImage *inputShadingImage = [[[CIImage alloc] initWithBitmapImageRep:shadingBitmap] autorelease];
CIFilter *transitionFilter = [CIFilter filterWithName:@"CIRippleTransition"];
[transitionFilter setDefaults];
[transitionFilter setValue:[CIVector vectorWithX:NSMidX(rect) Y:NSMidY(rect)] forKey:@"inputCenter"];
[transitionFilter setValue:[CIVector vectorWithX:rect.origin.x Y:rect.origin.y Z:rect.size.width W:rect.size.height] forKey:@"inputExtent"];
[transitionFilter setValue:inputShadingImage forKey:@"inputShadingImage"];
CATransition *presentAnimation = [CATransition animation];
[presentAnimation setFilter:transitionFilter];
[presentAnimation setDuration:1.0];
[presentAnimation setDelegate:self];
[contentView setAnimations:[NSDictionary dictionaryWithObject:presentAnimation forKey:@"subviews"]];
// maybe there are memory leaks in this code, don't bother at this moment
的问题是:
我执行该代码。第一次做
[[contentView animator] addSubview:mySubview];
,它不起作用。视图刚刚出现。CATransition
调用委托方法,但finished
标志为NO(false)。我删除了查看
[mySubview removeFromSuperview];
,它用动画删除,finished
flag = YES(true)。我重复步骤2和3,它与动画一起使用。第2步现在告诉动画是
finished
(是)。按预期工作。
怎么了?