Question

我在尝试使用UITextField在Interface Builder中正确呈现IBDesignable的子类时遇到问题。子类非常简单，它允许用户为UITextField中的文本放置定义插入。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，IB中的属性完全正常，但当我尝试更新其中一个值时，Xcode构建项目并吐出以下两个警告：

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

我可以在模拟器中构建和运行得很好，当我这样做时，视图会按照我的预期呈现。只是当我尝试在IB中呈现它时，我正在反对这个问题。我在Interface Builder中看到的用于制作交互式自定义视图的其他示例似乎就像我的一样简单并且运行没有问题。是否有一个我缺少的步骤，或者我想做的就是不去工作？

Answer 1

您需要在

中附上班级初始化者

#if !TARGET_INTERFACE_BUILDER ... #endif

请参阅http://digitalleaves.com/blog/2015/02/tutorial-building-your-own-custom-ibdesignable-view-a-uitextview-with-placeholder/以获取示例

在Interface Builder中呈现自定义UITextField子类的错误

1 个答案: