[英]SpriteKit and UISwipeGestureRecognizer
In my viewDidLoad
function, I setup a swipe gesture recognizer: 在我的
viewDidLoad
函数中,我设置了一个滑动手势识别器:
var swipeRecognizer:UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("move"))
swipeRecognizer.direction = .Right
view.addGestureRecognizer(swipeRecognizer)
And then I set up the move function: 然后我设置了移动功能:
func move(swipe:UISwipeGestureRecognizer) {
NSLog("swiped")
}
However, I keep getting the following error when I swipe right: 但是,当我向右滑动时,我不断收到以下错误:
[_TtC8swiftris9GameScene move]: unrecognized selector sent to instance 0xc81c200
2014-06-03 14:52:57.560 swiftris[45440:6777826]
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: '-[_TtC8swiftris9GameScene move]: unrecognized selector sent to instance 0xc81c200'
What could be the problem? 可能是什么问题呢?
You defined your function as move(swipe:UISwipeGestureRecognizer)
, which maps to the obj-c method name move:
, but your selector is just "move"
. 您将函数定义为
move(swipe:UISwipeGestureRecognizer)
,它映射到obj-c方法名称move:
,但您的选择器只是"move"
。 You need to use "move:"
instead. 你需要使用
"move:"
代替。
As @Kevin Ballard correctly points out, your selector doesn't match your method, which explains the "unrecognized selector" exception. 正如@Kevin Ballard正确指出的那样,你的选择器与你的方法不匹配,这解释了“无法识别的选择器”异常。 However, I think it's worth noting that you can ditch the cast to Selector altogether, and use a string literal in its stead.
但是,我认为值得注意的是,您可以完全抛弃转换为Selector,并使用字符串文字代替它。
You can construct a selector with a string literal, such as let mySelector: Selector = "tappedButton:".
您可以使用字符串文字构造一个选择器,例如让mySelector:Selector =“tappedButton:”。 Because string literals can be automatically converted to selectors, you can pass a string literal to any method that accepts a selector.
因为字符串文字可以自动转换为选择器,所以您可以将字符串文字传递给任何接受选择器的方法。
Example: 例:
let gesture: UISwipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action:"move:")
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