Question

我有一个香椿（player.physicsbody），我想通过按两个按钮（如太空入侵者中的一艘船）左右移动。我编写了这个并且它工作正常，当我在设备中运行应用程序时出现问题，如果按下“左键”，按“右键”则什么都不做，反之亦然。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInNode:self];
    SKNode *node = [self nodeAtPoint:location];

    if ([node.name isEqualToString:@"rightbutton"]){

        player.physicsBody.velocity=CGVectorMake(200, player.physicsBody.velocity.dy);

    }

    if ([node.name isEqualToString:@"leftbutton"]){

        player.physicsBody.velocity=CGVectorMake(-200, player.physicsBody.velocity.dy);

    }
}

Answer 1

调用[event allTouches]会返回一组UITouch事件的NSSet。调用[[event allTouches] anyObject]只返回该组的一个成员。我修改了你的代码来迭代集合中的所有触摸。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    for (UITouch *touch in [event allTouches]) {
        CGPoint location = [touch locationInNode:self];
        SKNode *node = [self nodeAtPoint:location];

        if ([node.name isEqualToString:@"rightbutton"]){

            player.physicsBody.velocity=CGVectorMake(200, player.physicsBody.velocity.dy);

        }
        else if ([node.name isEqualToString:@"leftbutton"]){

            player.physicsBody.velocity=CGVectorMake(-200, player.physicsBody.velocity.dy);

        }
    }
}

向左和向右移动玩家（touchesbegan）

1 个答案: