UISearchBar检测用户何时停止键入swift [英] UISearchBar detect when user stop type in swift

问题描述

我发现的大多数示例都在Objective - C中，这让我很难理解，有人可以在Swift中提供有关此问题的示例. 此处是一种解决方案，但它在Objective C中.

Most of the example I found is in Objective - C which is very hard for me to understand can someone provide an example regarding this question in Swift. Here is one solution but it is in Objective C.

推荐答案

func searchBar(searchBar: UISearchBar, textDidChange searchText: String) {
    print("after every text gets changed")
    timer.invalidate()
    timer = NSTimer.scheduledTimerWithTimeInterval(5, target: self, selector: #selector(ViewController.output), userInfo: searchText, repeats: false)
}

func output(){
    print("hello")
    if timer.userInfo != nil {
        print(timer.userInfo)
    }
    timer.invalidate()
}

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