Mac OS 开发学习 - 目录选择器/定义文件名

讲解两个组件NSOpenPanel和NSSavePanel

1. NSOpenPanel - 只能选择文件夹或文件，但没办法定义文件名称

        let openPanel = NSOpenPanel()
        openPanel.prompt = "确定"
        openPanel.allowedFileTypes = ["txt","doc"]
        openPanel.canChooseDirectories = true   //是否能打开文件夹
        openPanel.canChooseFiles = true //是否能选择文件
        openPanel.allowsMultipleSelection = false
        openPanel.allowsOtherFileTypes = true
        openPanel.directoryURL = nil
        openPanel.beginSheetModal(for: self.view.window!) { (response) in

        }

2. NSSavePanel - 可以定义保存的文件名和选择目录

用这个组件需要注意一下，运行起来可以会报错说权限问题，还需要设置一下User selected File这项为Read/Write

        let panel = NSSavePanel()
        panel.nameFieldStringValue = "Untitle"
        panel.directoryURL = nil
        panel.message = "保存文件"
        panel.allowsOtherFileTypes = true
        panel.allowedFileTypes = ["txt","doc"]
        panel.isExtensionHidden = true
        panel.canCreateDirectories = true
        panel.beginSheetModal(for: self.view.window!) { (response) in

        }