NSSearchField在SwiftUI中的高度变化

Question

我正在使用SwiftUI 1.0。

我为SwiftUI创建了一个搜索栏，如下所示：

import SwiftUI

struct Searchbar: NSViewRepresentable {
    class Coordinator: NSObject, NSSearchFieldDelegate {
        var parent: Searchbar
        
        init(_ parent: Searchbar) {
            self.parent = parent
        }
        
        func controlTextDidChange(_ notification: Notification) {
            guard let searchField = notification.object as? NSSearchField else {
                log.error("Unexpected control in update notification", source: .ui)
                return
            }
            self.parent.search = searchField.stringValue
        }
    }
    
    @Binding var search: String
    
    func makeNSView(context: Context) -> NSSearchField {
        let searchfield = NSSearchField(frame: .zero)    
        return searchfield
    }
    
    func changeSearchFieldItem(searchfield: NSSearchField, sender: AnyObject) -> NSSearchField {
        //Based on the Menu item selection in the search field the placeholder string is set
        (searchfield.cell as? NSSearchFieldCell)?.placeholderString = sender.title
        return searchfield
    }
    
    func updateNSView(_ searchField: NSSearchField, context: Context) {
        searchField.stringValue = search
        searchField.delegate = context.coordinator
    }
    
    func makeCoordinator() -> Coordinator {
        return Coordinator(self)
    }
}

到目前为止，在我的视图：Searchbar(search: $searchText)中使用它时，它运行得很好。

​

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我想知道是否可以将NSSearchField的高度更改为具有类似于Maps.app中所看到的视图：

​

Answer 1

更新：如果你在大苏尔，你也可以把controlSize设置为.large。https://developer.apple.com/documentation/appkit/nscontrol/controlsize/large

您可以添加一个高度约束：

func makeNSView(context: Context) -> NSSearchField {
    let searchfield = NSSearchField(frame: .zero)  
    searchfield.translatesAutoresizingMaskIntoConstraints = false
    searchfield.heightAnchor.constraint(greaterThanOrEqualToConstant: 40).isActive = true

    return searchfield
}

…在macOS 11.1BigSur.不幸的是，焦点环没有调整其高度。你可以这样把它藏起来

    searchTextField.focusRingType = .none

…但在大多数情况下，这似乎不可取。