默認(rèn)自定義控件時(shí)都是全屏iPhone樣式預(yù)覽
如果想要實(shí)現(xiàn)類似于xib那種特定尺寸的效果, 可以通過Group和previewLayout實(shí)現(xiàn)
e.g. 默認(rèn)狀態(tài)下新建控件時(shí)的樣式
默認(rèn).png
e.g. 修改后
預(yù)覽圖.png
兩種寫法對比:
struct LoginView_Previews: PreviewProvider {
static var previews: some View {
LoginView(account: "", password: "", loginCallback: nil)
}
}
struct LoginView_Previews: PreviewProvider {
static var previews: some View {
let width = UIScreen.main.bounds.size.width
return Group {
LoginView(account: "", password: "", loginCallback: nil)
.previewLayout(.fixed(width: width, height: 300))
}
}
}
