SceneKit_大神03_navigationbar上的3D文字
让学习成为一种习惯
1.学会使用SceneKit中一种原子修改机制(事务)
2.熟练掌握使用SCNTransaction类中的方法动态的修改属性
+ (void)begin;
+ (void)commit;
+ (void)flush;
+ (void)lock;
+ (void)unlock;
@property(class, nonatomic) CFTimeInterval animationDuration;
@property(class, nonatomic, copy, nullable) CAMediaTimingFunction *animationTimingFunction __WATCHOS_PROHIBITED;
@property(class, nonatomic) BOOL disableActions;
@property(class, nonatomic, copy, nullable) void (^completionBlock)(void);
+ (nullable id)valueForKey:(NSString *)key;
+ (void)setValue:(nullable id)value forKey:(NSString *)key;
[SCNTransaction setAnimationDuration:3.0];
sunNode.position = SCNVector3Make(0, 0, 0);
下面演示的是事物嵌套
[SCNTransaction begin];
[SCNTransaction setAnimationDuration:0.5];
// 0.5 秒执行完毕后 会执行block块
[SCNTransaction setCompletionBlock:^{
// 有事一个新的事务
[SCNTransaction begin];
[SCNTransaction setAnimationDuration:0.5];
material.emission.contents = [UIColor blackColor];
[SCNTransaction commit];
}];
material.emission.contents = [UIColor redColor];
[SCNTransaction commit];
本节的内容很简单,之前我们讲过行为动画也可以实现动画效果,你觉得两者的区别在哪里,自己思考。
代码库,听说经常给人点赞都当老板了!