SwiftUI:如何从 macOS 上的联系人中拖放联系人 [英] SwiftUI: How to drag and drop a contact from Contacts on macOS
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问题描述
我正在尝试将联系人从联系人拖到我的应用程序中.
I'm trying to drag a contact from Contacts into my application.
这是我更新的代码:
import SwiftUI
import UniformTypeIdentifiers
let uttypes = [UTType.contact, UTType.emailMessage]
struct ContentView: View
{
let dropDelegate = ContactDropDelegate()
var body: some View
{
VStack
{
Text("Drag your contact here!")
.padding(20)
}
.onDrop(of: uttypes, delegate: dropDelegate)
}
}
struct ContactDropDelegate: DropDelegate
{
func validateDrop(info: DropInfo) -> Bool
{
return true
}
func dropEntered(info: DropInfo)
{
print ("Drop Entered")
}
func performDrop(info: DropInfo) -> Bool
{
print ("performDrop")
NSSound(named: "Submarine")?.play()
print (info)
print ("Has UniformTypeIdentifiers:", info.hasItemsConforming(to: uttypes))
let items = info.itemProviders(for: uttypes)
print ("Number of items:",items.count)
print (items)
for item in items
{
print ("item:", item)
item.loadDataRepresentation(forTypeIdentifier: kUTTypeVCard as String, completionHandler: { (data, error) in
if let data = data
{
print ("contact")
}
})
}
return true
}
}
struct ContentView_Previews: PreviewProvider {
static var previews: some View {
ContentView()
}
}
控制台输出如下:
Drop Entered
performDrop
2020-11-07 10:00:37.150359+0000 DropContact[9653:434367] [plugin] AddInstanceForFactory: No factory registered for id <CFUUID 0x600003fd9b80> F8BB1C28-BAE8-11D6-9C31-00039315CD46
DropInfo(platformDropInfo: SwiftUI.(unknown context at $7fff423616a8).DropInfo_Mac(location: (85.0618896484375, 22.804290771484375), pasteboard: <NSPasteboard: 0x600001ba6ca0>))
Has UniformTypeIdentifiers: true
Number of items: 1
[<NSItemProvider: 0x6000014a73a0> {types = (
)}]
item: <NSItemProvider: 0x6000014a73a0> {types = (
)}
2020-11-07 10:00:37.427867+0000 DropContact[9653:434367] Cannot find representation conforming to type public.vcard
所以它知道 drop 中有一个联系人,但我如何访问它?当我尝试将其取出时,它似乎为零.
So it knows there is a contact in the drop, but how do I access it? It seems to be nil when I try to get it out.
推荐答案
订阅&加载数据类型应该相同,所以这里是一个工作解决方案的演示.使用 Xcode 12.1/macOS 10.15.7 测试
The subscription & load data types should be the same, so here is a demo of worked solution. Tested with Xcode 12.1 / macOS 10.15.7
let uttypes = [String(kUTTypeVCard), String(kUTTypeEmailMessage)]
struct ContentView: View
{
let dropDelegate = ContactDropDelegate()
var body: some View
{
VStack
{
Text("Drag your contact here!")
.padding(20)
}
.onDrop(of: uttypes, delegate: dropDelegate) // << kUTTypeVCard !!
}
}
import Contacts
struct ContactDropDelegate: DropDelegate
{
func validateDrop(info: DropInfo) -> Bool
{
return true
}
func dropEntered(info: DropInfo)
{
print ("Drop Entered")
}
func performDrop(info: DropInfo) -> Bool
{
print ("performDrop")
NSSound(named: "Submarine")?.play()
print (info)
print ("Has UniformTypeIdentifiers:", info.hasItemsConforming(to: uttypes))
let items = info.itemProviders(for: uttypes)
print ("Number of items:",items.count)
print (items)
for item in items
{
item.loadDataRepresentation(forTypeIdentifier: kUTTypeVCard as String, completionHandler: { (data, error) in
if let data = data,
let contact = try? CNContactVCardSerialization.contacts(with: data).first
{
print("Contact: (contact.givenName)")
}
})
}
return true
}
}
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