以下代码有什么问题,它似乎有无穷无尽的循环。最初通过init:frame到commonInit,然后XIB加载行通过init:coder等再次触发输入。
有两个问题:
a)如何实例化以避免这个问题(即想要使用XIB进行布局,然后在代码中的父视图上动态创建/定位其中的多个)
b)设置self.label.text是有问题的,因为看起来self.label(与XIB链接的UILabel)此时尚未设置,因此为零。所以动态地,当我想通过XIB创建这个小的自定义UIView时,将它添加为子类,然后立即设置标签的值我该怎么做?
导入UIKit
class DirectionInfoView: UIView {
@IBOutlet weak var label: UILabel!
func commonInit() {
let viewName = "DirectionInfoView"
let view: DirectionInfoView = NSBundle.mainBundle().loadNibNamed(viewName, owner: self, options: nil).first as! DirectionInfoView // <== EXC_BAD_ACCESS (code=2...)
self.addSubview(view)
view.frame = self.bounds
self.label.text = "testing 123"
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
}
用法:
let newInfoView = DirectionInfoView(frame: self.mapview.bounds)
myexitingView.addSubview(newInfoView)
答案 0 :(得分:1)
这似乎有效:
import UIKit
class DirectionInfoView: UIView {
@IBOutlet weak var label: UILabel!
func commonInit() {
self.layer.borderWidth = 5
self.layer.cornerRadius = 25
}
override init(frame: CGRect) {
super.init(frame: frame)
commonInit()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
commonInit()
}
}
用法:
let directionInfoView : DirectionInfoView = NSBundle.mainBundle().loadNibNamed("DirectionInfoView", owner: self, options: nil).first as! DirectionInfoView
mapview.addSubview(directionInfoView)
directionInfoView.label.text = "It Worked!"