Question

精灵套件和游戏开发新手我正在Following tutorial @ Raywenderlich 学习。

WHAT I AM DOING ?

我在地图上实现了连续动作，在播放器上实现了重力，我知道旋转动作可以像这样添加到SKSpriteNode。

        SKAction *action = [SKAction rotateByAngle:M_PI duration:1];

        [myPlayer runAction:[SKAction repeatActionForever:action]];

我的重力玩家如下

MSPlayer.h

#import <SpriteKit/SpriteKit.h>

@interface MSPlayer : SKSpriteNode
@property (nonatomic, assign) CGPoint velocity;
- (void)update:(NSTimeInterval)delta;
@end

MSPlayer.m

#import "MSPlayer.h"
#import "SKTUtils.h"

@implementation MSPlayer
//2
- (instancetype)initWithImageNamed:(NSString *)name {
    if (self == [super initWithImageNamed:name]) {
        self.velocity = CGPointMake(0.0, 0.0);
    }
    return self;
}

- (void)update:(NSTimeInterval)delta {
    //3
    CGPoint gravity = CGPointMake(0.0, -10.0);
    //4
    CGPoint gravityStep = CGPointMultiplyScalar(gravity, delta);
    //5
    self.velocity = CGPointAdd(self.velocity, gravityStep);
    CGPoint velocityStep = CGPointMultiplyScalar(self.velocity, delta);
    //6
    self.position = CGPointAdd(self.position, velocityStep);
}
-(CGRect)collisionBoundingBox {
    return CGRectInset(self.frame, 2, 0);
}

@end

My Issue is

现在的问题是我希望Node旋转并让它随着重力跳跃，旋转在Node即将结束跳跃之前结束。应该怎么做才能使两个动画同时结束？

Answer 1

为Jumping写另一个runAction

[myPlayer runAction:[SKAction repeatActionForever:runAction]];

在这里定义runAction。

SpriteKit - 旋转和跳转两者同时结束

1 个答案: