swift中block的简单使用

概述 var finishBlock: ((_ mm :String )->String)?     override func viewDidLoad() {         super.viewDidLoad()         // Do any additional setup after loading the view, typically from a nib.          //  var finishBlock: ((_ mm :String )->String)? overrIDe func vIEwDIDLoad() { super.vIEwDIDLoad() // Do any additional setup after loading the vIEw,typically from a nib. // load { (msg) -> String in // // return "hahh" // } // self.finishBlock!("hhah") finishBlock = {(msg)->String in return "你好" }; let kj = finishBlock!("kkk") // print(kj) } func load(successed: @escaPing (_ text :String )->String) { self.finishBlock = successed } 总结

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