二元运算符+不能应用于CGfloat类型的操作数 [英] Binary Operator + Cannot be Applied to Operands of Type CGfloat int

问题描述

我遇到了与之前不同代码行相同的问题;但是这一次，我无法用上次的方法修复它：

I am having the same problem as earlier with a different line of code; but this time, I wasn't able to fix it with the same approach as last time:

 var Y : Int = 0
 var X : Int = 0
 @IBOutlet var ball : UIImageView!
 ball.center = CGPointMake(ball.center.x + X, ball.center.y + Y) 

这是我得到的错误：

二元运算符+不能应用于CGfloat int类型的操作数

binary operator + cannot be applied to operands of type CGfloat int

推荐答案

请将它们声明为以下内容：

Declare them, instead, as the following:

let X : CGFloat = 0.0
let Y : CGFloat = 0.0

回复你的评论：

该错误与他们被声明为 var 或让。
您可以将它们声明为 var ，如果您坚持将它们声明为 Int ，您仍然会需要执行以下操作：

The error has nothing to do with them being declared as var or let. You could declare them as var and if you so insist on declaring them as Int, you would still need to do the following:

var X : Int = 0
var Y : Int = 0
ball.center = CGPointMake(view.center.x + CGFloat(X), view.center.y + CGFloat(Y))

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