在Swift中获取UIBarButtonItem的框架? [英] Get the frame of UIBarButtonItem in Swift?

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问题描述

如何在swift中获取rightbarbuttonItem的框架?我发现了这个: UIBarButtonItem:我如何找到它的框架?但是它说无法将NSString转换为UIView,或者无法将NSString转换为String:

how could I get the frame of a rightbarbuttonItem in swift? I found this : UIBarButtonItem: How can I find its frame? but it says cannot convert NSString to UIView, or cannot convert NSString to String :

let str : NSString = "view" //or type String
let theView : UIView = self.navigationItem.rightBarButtonItem!.valueForKey("view")//or 'str'

目标是删除rightBarButtonItem,改为添加imageView,并使用fadeOut效果移动它。

The goal is to remove the rightBarButtonItem, add an imageView instead, and move it with a fadeOut effect.

谢谢

推荐答案

您应该尝试:

var barButtonItem = self.navigationItem.rightBarButtonItem!
var buttonItemView = barButtonItem.valueForKey("view")

var buttonItemSize = buttonItemView?.size

编辑(Swift 3):

var barButtonItem = self.navigationItem.rightBarButtonItem!
let buttonItemView = barButtonItem.value(forKey: "view") as? UIView
var buttonItemSize = buttonItemView?.size

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