[Swift 開發] 使用閉包傳值(typealias)

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在Swift中使用閉包來實現兩個介面的傳值

 

例如:有A類和B類.

B類

//聲明閉包typealias valueBlock = (Float)->()var returnPrice: valueBlock?  //調用該閉包self.returnPrice?(price)

A類

let sb = UIStoryboard(name:"Main", bundle: nil)        let vc = sb.instantiateViewControllerWithIdentifier("keypadViewVC") as! keypadViewVC        //B類的回調vc.returnPrice = {price in self.gratuityBtn.setTitle(String(format: "%.2f", price), forState:UIControlState.Normal)}        self.presentViewController(vc, animated: true, completion: nil)

 

[Swift 開發] 使用閉包傳值(typealias)

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