各種編程語言輸入框按鈕的實現(xiàn)

本人有個需求，一個頁面，有按鈕，輸入框，一個顯示框，用戶點擊按鈕會彈出輸入框內(nèi)容，并且顯示在文本標(biāo)簽里面。我將使用以下技術(shù)逐個突破，各個擊破。win32 api編程，qt，java swing，swift，objective-c，swiftUI，Android，PHP，asp dao net web，winform，wpf，devExpress，mfc，js，golang，vb等實現(xiàn)
swiftUI

// ContentView.swift // lujuSwiftUIDemo1TextField // Created by 魯軍 on 2021/3/20. import SwiftUI struct ContentView: View {@State var content = ""@State var isAlert = false@State private var msg = ""var body: some View {VStack{Text(msg)TextField("", text: self.$content).background(Color.gray.opacity(0.3)).frame(height: 60).font(.system(size: 30)).padding()Button("點擊"){self.isAlert = truemsg = self.content.uppercased()}.alert(isPresented: $isAlert, content: {Alert(title: Text("提示信息"), message: Text(content.uppercased()), dismissButton: .default(Text("OK")))})}.padding()} } struct ContentView_Previews: PreviewProvider {static var previews: some View {ContentView()} }

swift代碼

// // ViewController.swift // DemoTestField1 // // Created by 魯軍 on 2021/3/21. //import UIKitclass ViewController: UIViewController {@IBOutlet weak var lbl: UILabel!@IBOutlet weak var text: UITextField!override func viewDidLoad() {super.viewDidLoad()lbl.text = ""}@IBAction func click(_ sender: Any) {lbl.text = text.text} }

oc代碼

// ViewController.m // ocTestFileld // Created by 魯軍 on 2021/3/21. #import "ViewController.h"@interface ViewController () - (IBAction)click:(id)sender; @property (weak, nonatomic) IBOutlet UILabel *lbl; @property (weak, nonatomic) IBOutlet UITextField *textField; @end@implementation ViewController - (void)viewDidLoad {[super viewDidLoad];self.lbl.text = @""; }- (IBAction)click:(id)sender {self.lbl.text = self.textField.text; } @end

java代碼

package com.lujun;import javax.swing.SwingUtilities; import javax.swing.UIManager;public class SwingDemo {public static void main(String[] args) {SwingUtilities.invokeLater(new Runnable() {@Overridepublic void run() {// TODO Auto-generated method stubcreateGUI();}});}public static void createGUI() {try {//UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");MyFrame frame = new MyFrame("Swing Demo [20210321]");} catch (Exception e) {// TODO: handle exceptione.printStackTrace();}}}

package com.lujun;import java.awt.Container;import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JTextField; import javax.swing.WindowConstants;public class MyFrame extends JFrame{JButton btnButton = null;JTextField textField=null;JLabel jLabel=null;//有參構(gòu)造public MyFrame(String title) {super(title);setSize(310, 270);Container container = getContentPane();textField = new JTextField();textField.setBounds(100, 10, 150, 30);container.add(textField);btnButton = new JButton("點擊");btnButton.setBounds(100, 100, 120, 40);container.add(btnButton);jLabel = new JLabel();jLabel.setBounds(100, 50, 120, 40);container.add(jLabel);setLayout(null);setVisible(true);setLocationRelativeTo(null);setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);setAlwaysOnTop(false);btnButton.addActionListener((e)->{testClick();});}private void testClick() {System.out.println("12312");Object[] options= {"OK","Cancel"};JOptionPane.showOptionDialog(null, textField.getText(), "提示", JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options[0]);jLabel.setText(textField.getText());}}

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;namespace TestShowMessage1 {public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){this.label1.Text = this.textBox1.Text;MessageBox.Show(this.textBox1.Text);}} }

Qt

#include "widget.h" #include "ui_widget.h" #include <QMessageBox>Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget) {ui->setupUi(this); }Widget::~Widget() {delete ui; }void Widget::on_pushButton_clicked() {ui->label->setText(ui->lineEdit->text());QMessageBox::warning(this,"提示",ui->lineEdit->text()); }

MFC源碼

void CMFCApplication2Dlg::OnBnClickedButton1() {CString str1;m_edit1.GetWindowTextW(str1);m_Msg.SetWindowTextW(str1);MessageBox(str1); }

需要添加變量(控件變量) 否則代碼報錯 點擊事件的函數(shù)

win 32 API編程

#include <Windows.h> #include<stdio.h> #include<string.h> #include <iostream> using namespace std; #pragma warning(disable:4996) HWND hEdit1; HWND hEdit2; HWND hLabel2; // 入口函數(shù) 是WinMain LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam); void CALLBACK MyTimeProc(HWND hWnd, UINT uMsg, UINT idEvent, DWORD Time);char* TCHARToChar(const TCHAR* pTchar);int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPreInstance, LPSTR lpCmdLine, int mCmdShow) {TCHAR szAppClassName[] = TEXT("dajun");WNDCLASS wc = { 0 }; //結(jié)構(gòu)體變量wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);wc.hCursor = LoadCursor(NULL, IDC_ARROW);wc.hInstance = hInstance;wc.lpfnWndProc = WindowProc;wc.lpszClassName = szAppClassName;wc.style = CS_HREDRAW | CS_VREDRAW;RegisterClass(&wc); //注冊//創(chuàng)建窗口HWND hWnd = CreateWindow(szAppClassName,TEXT("Desgin By Johnson2021.3.22"),WS_OVERLAPPEDWINDOW,400, 200,380, 240,NULL, //父窗口句柄NULL, //菜單句柄hInstance, //應(yīng)用程序?qū)嵗浔?/span>NULL);ShowWindow(hWnd, SW_SHOW);UpdateWindow(hWnd);MSG msg;while (GetMessage(&msg, NULL, 0, 0)){TranslateMessage(&msg);DispatchMessage(&msg);}return 0; } LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {static HFONT hFont; //邏輯字體static HBRUSH hBrush; //畫刷switch (uMsg){case WM_KEYDOWN:switch (wParam){case VK_UP:MessageBox(NULL, L"xia jian", L"Tips", MB_OK);break;default:break;}case WM_CREATE:{LPCREATESTRUCT pcs = (LPCREATESTRUCT)lParam;hEdit1 = CreateWindow(L"ediT", L"", WS_CHILD | WS_VISIBLE | WS_BORDER,30, 30,200,24,hWnd,(HMENU)110,pcs->hInstance,NULL);hEdit2 = CreateWindow(L"ediT", L"這是編輯框3", WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_MULTILINE | ES_AUTOHSCROLL | ES_NOHIDESEL,30, 80,200,100,hWnd,(HMENU)112,pcs->hInstance,NULL);hLabel2 = CreateWindow(L"static", L"這是靜態(tài)文本區(qū)域", WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_MULTILINE | ES_AUTOHSCROLL | ES_NOHIDESEL,20, 5,200,18,hWnd,(HMENU)118,pcs->hInstance,NULL);//創(chuàng)建畫刷hBrush = CreateSolidBrush(RGB(0x41, 0x96, 0x4F));//創(chuàng)建邏輯字體hFont = CreateFont(-14/*高*/, -7/*寬*/, 0, 0, 700 /*700表示粗體*/,FALSE/*斜體?*/, FALSE/*下劃線?*/, FALSE/*刪除線?*/, DEFAULT_CHARSET,OUT_CHARACTER_PRECIS, CLIP_CHARACTER_PRECIS, DEFAULT_QUALITY,FF_DONTCARE, TEXT("微軟雅黑"));//創(chuàng)建靜態(tài)文本框控件//設(shè)置控件的字體SendMessage(hLabel2, WM_SETFONT, (WPARAM)hFont, NULL);HWND hBtn = CreateWindow(L"button", L"點擊我", WS_CHILD | WS_VISIBLE | WS_BORDER,250, 30,80,30,hWnd,(HMENU)111,pcs->hInstance,NULL);SendMessage(hEdit2, EM_SETSEL, 0, 0);SendMessage(hEdit2, WM_CUT, 0, 0);SendMessage(hEdit2, EM_UNDO, 0, 0);return 0;}break;case WM_COMMAND:{int wmId = LOWORD(wParam);WORD code = HIWORD(wParam);HWND hCtrl = (HWND)lParam;if (wmId == 111 && code == BN_CLICKED){TCHAR buf[64] = { 0 };GetWindowText(hEdit1, buf, sizeof(buf));SetWindowText(hEdit2, buf);SetWindowText(hLabel2, buf);MessageBox(NULL, buf, L"tips", MB_OK);}}break;case WM_CLOSE:DestroyWindow(hWnd);break;case WM_DESTROY:PostQuitMessage(0);break;default:break;}return DefWindowProc(hWnd, uMsg, wParam, lParam); } char* TCHARToChar(const TCHAR* pTchar) {char* pChar = NULL; #ifdef _UNICODEint nLen = wcslen(pTchar) + 1;pChar = new char[nLen * 2];WideCharToMultiByte(CP_ACP, 0, pTchar, nLen, pChar, 2 * nLen, NULL, NULL); #elseint nLen = strlen(pTchar) + 1;pChar = new char[nLen];memcpy(pChar, pTchar, nLen * sizeof(char)); #endifreturn pChar; }

實現(xiàn)效果:

vb程序代碼

Public Class Form1Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.ClickMe.Label1.Text = Me.TextBox1.Text.ToUpper()Dim str As String = Me.TextBox1.TextMsgBox(str)End Sub End Class

實現(xiàn)效果

python 實現(xiàn)源碼

import tkinter as tk import os from collections import Counterwindow = tk.Tk() window.title('Python Test [20210321]') window.geometry('300x250') lbl = tk.Label(window, text="", bg='#80ff80', font=('Arial', 20), width=20) lbl.pack()text1 = tk.Text(window, width=20, height=1, font=('Arial', 18)) text1.pack()def insert_point():str3 = text1.get(1.0, "end")t.insert('insert', str3)lbl.config(text=str3)b1 = tk.Button(window, text='點擊', bg='#ff8080', width=20, height=4, command=insert_point) b1.pack()t = tk.Text(window, width=20, height=40, font=('Arial', 12), bg='black') t.configure(fg='#2ce82c') t.pack()window.mainloop()

實現(xiàn)效果

原生javascript 實現(xiàn)

<!DOCTYPE html> <html><head><meta charset="utf-8" /><title>test</title><style type="text/css">*{margin: 0;padding: 0;}#div1{width: 500px;height: 300px;border: 1px solid #000;margin: 100px;padding: 50px;}</style><script type="text/javascript">window.onload=function(){var btn = document.getElementById('btn1')var txt = document.getElementById('txt1')var oSp = document.getElementById('sp1')//第一種寫法btn.addEventListener('click',function(){//alert("test") oSp.innerHTML = txt.valuealert(txt.value)})//第二種寫法btn.onclick=function(){oSp.innerHTML = txt.value // alert("test1") alert(txt.value)}//ES6 寫法 需要瀏覽器較高 否則不支持 /*btn.onclick = ()=>{alert("test2")}*/}</script></head><body><div id="div1"><span id="sp1" style="margin: 20px;"></span><br /><input type="text" style="margin: 20px;" id="txt1" /><br /><input type="button" id="btn1" value="點擊" style="margin: 20px;" /><br /></div></body> </html>

JQuery寫法:

<!DOCTYPE html> <html><head><meta charset="utf-8" /><title>test</title><style type="text/css">*{margin: 0;padding: 0;}#div1{width: 500px;height: 300px;border: 1px solid #000;margin: 100px;padding: 50px;}</style><script src="jquery.js" type="text/javascript"></script><script type="text/javascript">$(function(){//第一種寫法$("#btn1").click(function(){var txt = $("#txt1").val()$("#sp1").html(txt)//alert(txt)});//第二種寫法$("#btn1").on('click',function(){//alert("456")var text1 = $("#txt1").val()$("#sp1").html(text1)});});</script></head><body><div id="div1"><span id="sp1" style="margin: 20px;"></span><br /><input type="text" style="margin: 20px;" id="txt1" /><br /><input type="button" id="btn1" value="點擊" style="margin: 20px;" /><br /></div></body> </html>

wpf寫法:

<Grid><Label x:Name="lbl" Width="200" Height="30" Margin="-400,-90,20,20" /><TextBox x:Name="text1" Width="200" Height="30" Margin="30,30,450,30" /><Button x:Name="btn" Width="60" Height="30" Content="點擊我" RenderTransformOrigin="6.406,0.851" HorizontalAlignment="Center" Margin="-50,0,0,0" Click="Btn_Click" /></Grid> namespace WpfApp1 {/// <summary>/// MainWindow.xaml 的交互邏輯/// </summary>public partial class MainWindow : Window{public MainWindow(){InitializeComponent();}private void Btn_Click(object sender, RoutedEventArgs e){string demo = text1.Text;lbl.Content = text1.Text;MessageBox.Show(demo);}} }

安卓待續(xù)… 2021.3.22 from Shanghai By Johnson

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