小编Nie*_*app的帖子

$items1 = ['apple', 'tree', 'juice'];
$items2 = ['apple', 'tree'];
$items3 = ['apple'];

// loop
If ($items[i].containsOnly['apple'])
{
  // do something..
}

在上面的简化示例中，我想获取与给定项目匹配的数组。有没有类似于“ containsOnly”的方法？或最佳方法是什么？

背景zPosition为1,发射器节点为2.仍然是背景.我甚至尝试过更高的数字,但它无济于事.

码

SKSpriteNode *bg = [SKSpriteNode spriteNodeWithImageNamed:@"TiltToMove_BG"];
bg.size = self.size;
bg.zPosition = 1;
bg.position = CGPointMake(self.size.width * 0.5, self.size.height * 0.5);
[self addChild:bg];

NSString *fireEmmitterPath = [[NSBundle mainBundle] pathForResource:@"fire" ofType:@"sks"];
SKEmitterNode *fireEmmitter = [NSKeyedUnarchiver unarchiveObjectWithFile:fireEmmitterPath];
fireEmmitter.position = CGPointMake(self.size.width * 0.5, self.size.height * 0.5 - 100);
fireEmmitter.name = @"fireEmmitter";
fireEmmitter.zPosition = 2;
fireEmmitter.targetNode = self;
[self addChild:fireEmmitter];