Ios 在Interface Builder中呈现自定义UITextField子类时出错

我在尝试使用

IBDesignable

在Interface Builder中正确呈现

UITextField

的子类时遇到问题。子类非常简单，它允许用户为

UITextField

中的文本位置定义插入。代码如下：

import Foundation

@IBDesignable public class CLYInsetTextField: UITextField {

    @IBInspectable public var topInset: CGFloat = 0 {
        didSet {
            self.setNeedsDisplay()
        }
    }
    @IBInspectable public var leftInset: CGFloat = 0 {
        didSet {
            self.setNeedsDisplay()
        }
    }
    @IBInspectable public var bottomInset: CGFloat = 0 {
        didSet {
            self.setNeedsDisplay()
        }
    }
    @IBInspectable public var rightInset: CGFloat = 0 {
        didSet {
            self.setNeedsDisplay()
        }
    }

    override public func textRectForBounds(bounds: CGRect) -> CGRect {
        return UIEdgeInsetsInsetRect(bounds, UIEdgeInsetsMake(topInset, leftInset, bottomInset, rightInset))
    }

    override public func editingRectForBounds(bounds: CGRect) -> CGRect {
        return UIEdgeInsetsInsetRect(bounds, UIEdgeInsetsMake(topInset, leftInset, bottomInset, rightInset))
    }
}

在故事板中使用此类时，属性在IB中显示得非常好，但当我尝试更新其中一个值时，Xcode构建项目并发出以下两个警告：

error: IB Designables: Failed to update auto layout status: dlopen([APP_NAME].app, 1): no suitable image found.  Did find:
[APP_NAME].app: can't map unslidable segment __TEXT to 0x100000000 with size 0x7EB000

error: IB Designables: Failed to render instance of CLYInsetTextField: dlopen([APP_NAME].app, 1): no suitable image found.  Did find:
[APP_NAME].app: can't map unslidable segment __TEXT to 0x100000000 with size 0x7EB000

---

我可以在模拟器中很好地构建和运行，当我这样做的时候，视图会按照我的预期呈现。当我试图在IB中呈现它时，我遇到了这个问题。我所看到的在Interface Builder中创建交互式自定义视图的其他示例似乎和我的一样简单，运行起来没有问题。是否有一个步骤我遗漏了，或者我正在尝试做的只是不起作用？

您需要在

#if !TARGET_INTERFACE_BUILDER ... #endif

请参阅以获取示例