[英]Swift instantiating a UIViewController and adding as subview in same file
我是Swift和原生iOS开发的新手。
我成功地在Swift中创建了一个标签,该标签在我的应用中显示如下:
import UIKit
import SpreadsheetView
class SampleView: UIView {
override init(frame: CGRect) {
super.init(frame: frame)
let label = UILabel(frame: CGRect(x: 0, y: 0, width: 100, height: 50))
label.text = "This is Swift"
self.addSubview(label)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
但是我现在需要添加一个SpreadsheetView-从这里-https://github.com/kishikawakatsumi/SpreadsheetView
我没有添加标签,而是将代码更改为:
import UIKit
import SpreadsheetView
class ViewController: UIViewController, SpreadsheetViewDataSource {
@IBOutlet weak var spreadsheetView: SpreadsheetView!
override func viewDidLoad() {
super.viewDidLoad()
spreadsheetView.dataSource = self
}
func numberOfColumns(in spreadsheetView: SpreadsheetView) -> Int {
return 200
}
func numberOfRows(in spreadsheetView: SpreadsheetView) -> Int {
return 400
}
func spreadsheetView(_ spreadsheetView: SpreadsheetView, widthForColumn column: Int) -> CGFloat {
return 80
}
func spreadsheetView(_ spreadsheetView: SpreadsheetView, heightForRow row: Int) -> CGFloat {
return 40
}
}
class SampleView: UIView {
override init(frame: CGRect) {
super.init(frame: frame)
let storyboard = UIStoryboard(name: "MyStoryboardName", bundle: nil)
let controller = storyboard.instantiateViewController(withIdentifier: "ViewController");
self.addSubview(controller.view);
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
但是,在运行时,我得到了一个SIGABRT,这是否是正确的方法。 我看到很多关于添加控制器的文章,例如在Swift中将View控制器添加为子视图,但是请您帮我解决上述问题。
这是我的截图:
尝试这个:
let controller = ViewController()
您不需要SampleView
类。 我认为您感到困惑,因为@IBOutlet weak var spreadsheetView: SpreadsheetView!
。 您不必遵循此过程。 您只需创建一个实例并相应地使用它。
如果您要使view
成为SpreadsheetView
,请按照以下方式使用它:
import UIKit
import SpreadsheetView
class ViewController: UIViewController, SpreadsheetViewDataSource {
let spreadsheetView = SpreadsheetView() //have an SpreadsheetView
override func viewDidLoad() {
super.viewDidLoad()
spreadsheetView.dataSource = self
self.view = spreadsheetView //set your controller's container view as that spreadsheetView
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func numberOfColumns(in spreadsheetView: SpreadsheetView) -> Int {
return 200
}
func numberOfRows(in spreadsheetView: SpreadsheetView) -> Int {
return 400
}
func spreadsheetView(_ spreadsheetView: SpreadsheetView, widthForColumn column: Int) -> CGFloat {
return 80
}
func spreadsheetView(_ spreadsheetView: SpreadsheetView, heightForRow row: Int) -> CGFloat {
return 40
}
}
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