我有一个CAEmitterCell
,我已经设置了一个特定的颜色。文档说这个属性是可动画的,我想为我游戏中的不同玩家(所有玩家一开始都选择他们的颜色)在多种不同颜色之间制作动画。
这是我的EmitterCell
设置:
//
// Emitter Cells
//
// 'New Emitter' cell configuration
newEmitter = [CAEmitterCell emitterCell];
newEmitter.scaleSpeed = 10;
newEmitter.lifetime = 2.481715;
newEmitter.velocity = 332.3636968085106;
newEmitter.contents = newemitterImg;
newEmitter.name = @"New Emitter";
newEmitter.color = [[UIColor colorWithRed:0.50 green:0.00 blue:1.00 alpha:1.00] CGColor];
newEmitter.scaleRange = 4.178236607142859;
newEmitter.lifetimeRange = 1.6;
newEmitter.greenRange = -2.775558e-17;
newEmitter.birthRate = 40;
newEmitter.emissionRange = -6.283185306666667;
newEmitter.scale = 0;
//
// Emitter Cell Chains
//
emitter.emitterCells = [NSArray arrayWithObjects:newEmitter, nil];
这里是我在这种情况下测试颜色变化的地方,只是在两种不同颜色之间跳跃:
-(void)changeColor {
if (color == 0) {
color = 1;
NSLog(@"color = 1");
[UIView animateWithDuration:1.5 delay:0 options:0 animations:^{
newEmitter.color = [[UIColor colorWithRed:0.50 green:0.00 blue:1.00 alpha:1.00] CGColor];
} completion:^(BOOL finished) {[self performSelector:@selector(changeColor) withObject:nil afterDelay:2];}];
} else {
color = 0;
NSLog(@"color = 0");
[UIView animateWithDuration:1.5 delay:0 options:0 animations:^{
newEmitter.color = [[UIColor colorWithRed:1.00 green:0.50 blue:0.10 alpha:1.00] CGColor];
} completion:^(BOOL finished) {[self performSelector:@selector(changeColor) withObject:nil afterDelay:2];}];
}
}
但是,当我运行它时,颜色永远不会改变。我在这里误解了“ Animatable ”的性质,还是我只需要以不同的方式处理它CAEmitterCell
?