使用#selector swift3 时出现 NSInvalidArgument 异常

Question

当我运行函数

func makeSpriteShoot(bullets bulletInfo:MHBulletInformation,player playerSprite:SKSpriteNode){
    print("Foo")
    let shootTimer = Timer.scheduledTimer(timeInterval: bulletInfo.frequency, target: true, selector: #selector(shootBullet), userInfo: nil, repeats: true)
}
func shootBullet(){
    player.shootBullet(angle: 90)//player is a instance of a subclass of SKSpriteNode
}

我得到以下异常+SIGABRT：

terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFBoolean shootBullet]: unrecognized selector sent to instance ...

以上两个函数都在 Swift3 中 SKScene 运行ning 的子类中。

值得注意的是，与 #selector(test)

不同，我没有遇到任何编译时错误

Answer 1

您在将 target 设置为 Boolean 值时犯了错误。

target is the object to which to send the message specified by aSelector when the timer fires. The timer maintains a strong reference to target until it (the timer) is invalidated.

因此，如果 class 中存在您安排 Timer.

的方法，则只需将 target 设置为 self

let shootTimer = Timer.scheduledTimer(timeInterval: bulletInfo.frequency, target: self, selector: #selector(shootBullet), userInfo: nil, repeats: true)

使用#selector swift3 时出现 NSInvalidArgument 异常

NSInvalidArgument exception when using #selector swift3

selector

nstimer

unrecognized-selector

swift

swift3