问题
I'm implementing a custom view by subclassing UIView
and using @IBInspectable
for some of my variables. Two of them are UIImage. If I try to access one of them in the code, the interface builder crashes with the following message:
file:///PathToMyProject/MyProject/Pod/Classes/UI/View/MyView.xib: error: IB Designables: Failed to update auto layout status: The agent crashed
and
file:///PathToMyProject/MyProject/Pod/Classes/UI/View/MyView.xib: error: IB Designables: Failed to render instance of MyView: The agent crashed
Everything runs fine on simulator and device.
Here's how you can reproduce it, assumed image_one.png
is in the assets:
import UIKit
@IBDesignable
class MyView: UIView {
@IBInspectable
var anImage: UIImage = UIImage(named: "image_one")!
}
In fact the interface builder agent crashes at initializing this variable. If you write var anImage: UIImage! = UIImage(named: "image_one")
, then the agent crashes when accessing this variable (as stated above).
Any ideas?
回答1:
You do not have to set you image in inspector in IB heres a solution purely in code.
let bundle = Bundle(for: self.classForCoder)
image = UIImage(named: "your_image.png", in: bundle, compatibleWith: self.traitCollection)!
self.setImage(image, for: .normal)
回答2:
The problem is that paths to images are different in Interface Builder than they are in your app, so IB is dereferencing a nil image. You can fix this by using optionals and then setting the image in the Attributes inspector in IB.
Here's the updated code:
import UIKit
@IBDesignable
class MyView: UIView {
@IBInspectable
var anImage: UIImage? = UIImage(named: "image_one")
}
回答3:
I have similar error using ibinspectable UIImage. I used image literal as initial value and that cause the error. I solved it by removing that image literal and changed to UIImage:named:
.
This caused error:
@IBInspectable var _iconImage: UIImage? = #imageLiteral(resourceName: "ic_arrow_dropdown") {
didSet { iconImageView.image = _iconImage }
}
_
Solved with:
@IBInspectable var _iconImage: UIImage? = UIImage(named: "ic_arrow_dropdown") {
didSet { iconImageView.image = _iconImage }
}
_
*I know OP didn't use image literal. Just in case somebody need it.
来源:https://stackoverflow.com/questions/34919771/interface-builder-agent-crashes-when-accessing-ibinspectable-uiimage