【发布时间】：2024-01-07 16:17:01
【问题描述】：
此代码打开消息应用程序并发送消息。不幸的是，消息传递应用程序没有关闭。总是要杀死应用程序。消息应用程序被窃听。取消按钮不起作用。任何帮助表示赞赏。
图 1：这是初始屏幕。可以取消，一切正常
图 2：这是在点击返回后发送消息。 Noice 取消选项是灰色的
图 3：这是崩溃。键盘没了，取消还是灰显，无法关闭这个窗口
import SwiftUI
import MessageUI
struct Services: View {
@Binding var name: String
let urlString = URL (string: "tel://1234567")!
var body: some View {
NavigationView{
VStack {
VStack(alignment: .leading){
Text("text1" )
.padding(.vertical, 5.0)
}
Spacer()
HStack {
Button(action: {
UIApplication.shared.open(self.urlString)
}) {
Text("Call phone")
}
.frame(minWidth: 0, maxWidth: 150)
.font(.subheadline)
Button(action: {
presentMessageCompose(name: self.name)
}) {
Text("Text phone")
.font(.subheadline)
}
.frame(minWidth: 0, maxWidth: 150)
}
Spacer()
}
.navigationBarTitle("Title")
}
}
}
func presentMessageCompose(name:String) {
let messageComposeDelegate = MessageComposeDelegate()
guard MFMessageComposeViewController.canSendText() else {
return
}
let vc = UIApplication.shared.windows.filter {$0.isKeyWindow}.first?.rootViewController
let composeVC = MFMessageComposeViewController()
composeVC.messageComposeDelegate = messageComposeDelegate
composeVC.recipients = ["1234567"]
composeVC.body = "Message to send to \(name))"
vc?.present(composeVC, animated: true, completion: nil)
}
我必须单独创建这个类：MessageComposeDelegate
import Foundation
import MessageUI
class MessageComposeDelegate: NSObject, MFMessageComposeViewControllerDelegate {
func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) {
// Customize here
controller.dismiss(animated: true)
}
}
我将打开消息相关的代码移到了一个新的类中：
import UIKit
import MessageUI
class DisplayMessageInterface: UIViewController, MFMessageComposeViewControllerDelegate {
func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) {
switch (result) {
case .cancelled:
print("Message was cancelled")
dismiss(animated: true, completion: nil)
case .failed:
print("Message failed")
dismiss(animated: true, completion: nil)
case .sent:
print("Message was sent")
dismiss(animated: true, completion: nil)
default:
break
}
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func displayMessageInterface() {
let topVC = topMostController()
let composeVC = MFMessageComposeViewController()
composeVC.messageComposeDelegate = self
// Configure the fields of the interface.
composeVC.recipients = ["1234567"]
composeVC.body = "I love Swift!"
// Present the view controller modally.
if MFMessageComposeViewController.canSendText() {
topVC.present(composeVC, animated: true, completion: nil)
} else {
print("Can't send messages.")
}
}
func topMostController() -> UIViewController {
var topController: UIViewController = UIApplication.shared.keyWindow!.rootViewController!
while (topController.presentedViewController != nil) {
topController = topController.presentedViewController!
}
return topController
}
}
并将按钮操作更新为：
Button(action: {
let displaymessageinterface = DisplayMessageInterface()
displaymessageinterface.displayMessageInterface()
})
但我仍然遇到同样的问题
当我点击取消按钮时，会出现一个新错误：“线程 1：EXC_BAD_ACCESS (code=1, address=0x1c)”。图4
【问题讨论】：
-
您不能让邮件应用程序自动发送消息。如果你能在用户不知情的情况下做到这一点，那就太可怕了。
-
不只是输入垃圾，为什么不解释一下您为尝试解决问题所做的工作？
-
我不知道如何解决这个问题，因为我不知道为什么代码会与消息应用程序混淆并使其崩溃
-
此代码无法打开电子邮件。它打开手机拨打电话并且工作正常。它打开短信 iphone 应用程序但崩溃（使用方法 presentmessagecompose）