我正在为导航栏之类的东西构建一个自定义 UIView,并希望在我的 Storyboard 中的 View Controller 内显示此栏。
酒吧分为两部分。一个 UIView 用于背景,一个 UIImageView 用于波浪图像。我的问题是,如果我在 Storyboard 中使用该自定义 View ,则只有背景 UIView 会实时渲染,而图像不会。如果我为图像设置一个 @IBInspectable
并将其设置为检查器中的 UIImageView,它就可以工作。
这是酒吧的样子:
这是我的代码(Swift 3):
TopBar.swift
@IBDesignable
class TopBar: UIView {
override init(frame: CGRect) {
super.init(frame: frame)
initView()
}
required init?(coder: NSCoder) {
super.init(coder: coder)
initView()
}
func initView() {
let bundle = Bundle(for: type(of: self))
let nib = UINib(nibName: "TopBar", bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil).first as! UIView
view.frame = bounds
view.autoresizingMask = [.flexibleWidth, .flexibleHeight]
addSubview(view)
}
}
最佳答案
尝试实现您的 awakeFromNib 方法并添加 prepareForInterfaceBuilder 方法
override func awakeFromNib() {
super.awakeFromNib()
self.initView()
}
override func prepareForInterfaceBuilder() {
super.prepareForInterfaceBuilder()
self.initView()
}
已编辑
这很奇怪,因为我一直在使用这个类,并且在我的 Storyboard中渲染得很好
import UIKit
@IBDesignable class GenericXibView: UIView {
@IBInspectable var nibName:String?
/**
View name.
*/
func getNibName() ->String?
{
return nibName
}
/**
View itself.
*/
var vView : UIView!;
override func awakeFromNib() {
super.awakeFromNib()
self.setup()
}
/**
Class construct. Initialize the view.
*/
public override init(frame oFrame: CGRect) {
super.init(frame: oFrame);
self.setup();
}
/**
Class construct. Initialize the view.
*/
public required init?(coder oDecoder: NSCoder) {
super.init(coder: oDecoder);
self.setup();
}
/**
Initialize the custom view and add it to this.
*/
fileprivate func setup() {
assert(self.getNibName() != nil, "View with empty nib name can't be instatiated")
self.vView = UINib(nibName: self.getNibName()!, bundle: Bundle(for: type(of: self))).instantiate(withOwner: self, options: nil)[0] as! UIView;
self.vView.translatesAutoresizingMaskIntoConstraints = false;
self.addSubview(vView);
self.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-0-[view]-0-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: nil, views: ["view":self.vView]));
self.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-0-[view]-0-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: nil, views: ["view":self.vView]));
// self.vImgUser.layer.cornerRadius = (self.vImgUser.frame.size.width / 2);
// self.vImgUser.layer.masksToBounds = true;
self.setNeedsLayout();
}
override func prepareForInterfaceBuilder() {
super.prepareForInterfaceBuilder()
setup()
vView.prepareForInterfaceBuilder()
}
/*
// Only override draw() if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
override func draw(_ rect: CGRect) {
// Drawing code
}
*/
}
还要确保你的类在你的 xib 文件中设置为 fileOwner
希望对你有帮助
关于ios - 自定义 View 中的图像不会实时渲染,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44778049/