SwiftUI代码片段
SwiftUI嵌入原生视图
struct MyButton: NSViewRepresentable {
var text1: Int
init(val: Int) {
self.text1 = val
}
func makeNSView(context: NSViewRepresentableContext<MyButton>) -> NSView {
print("makeNSView \(self.text1)")
//scrolleView.addSubview(btn)
// let txt = NSText()
// txt.textColor = NSColor.blue
// txt.string = "sssssss"
//
//scrolleView.addSubview(txt)
if self.text1 == 1 {
let btn = NSButton();
btn.title = "click"
return btn
} else if self.text1 == 2 {
let txt = NSText()
txt.string = "我是文本"
return txt
} else if self.text1 == 300 {
return NSHostingView(rootView: Button2()) // 这个代码无法正常运行，会有个什么cycle错误
} else {
let url = URL(string: "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1568399815066&di=248f52ca4effe6c6699b34383eb12c61&imgtype=0&src=http%3A%2F%2Finews.gtimg.com%2Fnewsapp_ls%2F0%2F9944277690_200200%2F0.jpg")
let img = NSImage(contentsOf: url!)!
return NSImageView(image: img)
}
}
func updateNSView(_ nsView: NSView, context: NSViewRepresentableContext<MyButton>) {
print("updateNSView \(self.text1)")
}
}
嵌入原生视图播放视频
struct PlayerView: NSViewRepresentable {
func updateNSView(_ nsView: NSView, context: NSViewRepresentableContext<PlayerView>) {
}
func makeNSView(context: Context) -> NSView {
return PlayerNSView(frame: .zero)
}
}
class PlayerNSView: NSView{
private let playerLayer = AVPlayerLayer()
override init(frame: CGRect){
super.init(frame: frame)
let urlVideo = URL(string: "https://bitdash-a.akamaihd.net/content/sintel/hls/playlist.m3u8")!
// let urlVideo = URL(string: "http://api.tidal.com/v1/videos/98785108/hls/CAEQARgDIB8onxA=.m3u8?authtoken=exp~1566425270000.hmac~s-qcr5zT9d-h4lsKFGFzeZtPweknicoaO8tsMJZP4kM=")!
let player = AVPlayer(url: urlVideo)
player.play()
playerLayer.player = player
if layer == nil{
layer = CALayer()
}
layer?.addSublayer(playerLayer)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func layout() {
super.layout()
playerLayer.frame = bounds
}
}
嵌入原生视图处理滚动条
struct PatternView: NSViewRepresentable {
@Binding var text1: String
class Coordinator: NSObject, NSTextViewDelegate {
var view: PatternView
init(_ view: PatternView) {
self.view = view
}
func textDidBeginEditing(_ notification: Notification) {
//view.onEditingChanged(true)
//print("sss")
}
func textDidChange(_ notification: Notification) {
//print("sss2")
guard let textView = notification.object as? NSTextView else {
return
}
//print("sss4")
view.text1 = textView.string
//view.onEditingChanged(true)
}
func textDidEndEditing(_ notification: Notification) {
//view.onEditingChanged(true)
//print("sss3")
}
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
func makeNSView(context: NSViewRepresentableContext<PatternView>) -> NSView {
//let scrolleView = NSScrollView()
let scrolleView = NSScrollView(frame: NSRect(origin: .zero, size: NSSize(width: 20, height: 30)))
scrolleView.hasVerticalScroller = true
scrolleView.hasHorizontalRuler = false
scrolleView.backgroundColor = NSColor.blue
let textView = NSTextView()
//let textView = NSTextView(frame: NSRect(origin: .zero, size: size))
textView.textContainerInset = NSSize(width: 5, height: 5)
textView.font = NSFont.systemFont(ofSize: 20)
//textView.minSize = NSSize(width: 0, height: size.height)
//textView.maxSize = NSSize(width: CGFloat.infinity, height: CGFloat.infinity)
textView.isVerticallyResizable = true // 这两个字段影响swiftui的宽度和高度，也影响nsscrollview的宽度和高度
textView.isHorizontallyResizable = true
textView.textContainer?.containerSize = NSSize(width: CGFloat.infinity, height: CGFloat.infinity)
textView.textContainer?.widthTracksTextView = true
//textView.string = self.contentText
textView.backgroundColor = NSColor.green
//let text1: TextStorageDelegate = TextStorageDelegate(master: self)
textView.delegate = context.coordinator
//textView.textStorage?.delegate = text1
scrolleView.documentView = textView
return scrolleView
//return textView
}
func updateNSView(_ nsView: NSView, context: NSViewRepresentableContext<PatternView>) {
}
}
Image View使用
struct ContentView6: View {
@State var someInts = [1]
var text1 = 2
var body: some View {
VStack {
HStack {
Button(action: {
self.someInts.append(3)
}) {
Text("添加新图片")
}
Button(action: {
self.someInts.append(2)
}) {
Text("添加新按钮")
}
}
ScrollView {
VStack {
ForEach(someInts, id: \.self) { user in
self.getSomeView(user)
}
}
}
}
}
func getSomeView(_ vType: Int) -> some View {
if vType == 1 {
return getTextView(vType)
}
return getTextView(vType)
// if vType == 2 {
// return Button(action: {
// self.someInts.append(1)
// }) {
// Text("我是按钮二")
// }
// }
// if vType == 3 {
// return getImageView()
// }
// return Button(action: {
// self.someInts.append(1)
// }) {
// Text("t33")
// }
}
func getTextView(_ vType: Int) -> Text {
if vType == 1 {
return Text("t11")
} else if vType == 2 {
return Text("t22")
}
return Text("ddddd")
}
func getButtonView(_ vType: Int) -> Button<Text> {
return Button(action: {
self.someInts.append(1)
}) {
Text("t33")
}
}
func getImageView() -> Image {
let url = URL(string: "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1568399815066&di=248f52ca4effe6c6699b34383eb12c61&imgtype=0&src=http%3A%2F%2Finews.gtimg.com%2Fnewsapp_ls%2F0%2F9944277690_200200%2F0.jpg")
let img = NSImage(contentsOf: url!)!
return Image(nsImage: img)
}
}
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