1.小程序wx-for嵌套
2.微信小程序03-页面渲染wx:if
3.微信å°ç¨åºviewåµå¥ç¹å»äºä»¶
4.java小程序源代码,网页简单点的嵌套,100多行,小程序源谁有啊
小程序wx-for嵌套
微信小程序中的wx-for指令是实现数据动态绑定的关键,它允许我们在前端以JSON对象的页嵌源码形式进行循环渲染。例如,程序直播加彩源码当我们需要创建一个宫格布局,网页wx-for的嵌套嵌套就显得尤为重要。嵌套的小程序源目的是处理更复杂的循环结构,尽管理解起来可能有些挑战。码网
下面是页嵌源码一个示例,展示如何在index.wxml中实现两层嵌套循环:
{ { OneModuleObj.title}}
{ { TwoModuleObj.text}}
其中,程序wx:for-item的网页python圣诞表白源码值(如OneModuleObj和TwoModuleObj)是对应于JavaScript中的对象名称,用于在循环中访问各项的嵌套属性。如`{ { OneModuleObj.title}}`和`{ { TwoModuleObj.text}}`分别用于获取第一层和第二层循环对象的小程序源属性值。`block`标签在这里用于定义块,但需注意,`view`标签默认是纵向布局,如果需要横向排列,影视源码 免采集需要特殊处理。
在JavaScript中,我们首先定义JSON数组和对象,例如:
javascript
var OneArray = []; // 第一层循环数组
var OneModuleObj = { }; // 第一层循环对象
OneArray.push(OneModuleObj);
this.setData({ OneArray: OneArray });
最后,通过字符串形式的JSON对象,可以直接绑定到页面,2021tv源码实现预期的渲染效果。通过理解wx:for-item的使用,处理更深层次的嵌套循环就变得简单了。
微信小程序-页面渲染wx:if
微信小程序中wx:if的简单用法,三目的写法适用于内部只有一句话的情况,wx:if与hidden的加粉页面源码区别在于,hidden对元素不可见但不执行任何操作,而wx:if则在条件不满足时隐藏元素并释放内存。 数组渲染使用wx:for实现,block通常用于循环整体展示内容。希望元素在一行显示时,应使用固定写法。 scroll-view与wx:for循环的嵌套能够实现列表滚动展示。 快递单号查询功能,通过wx:request发送请求。在输入框中输入快递单号时触发请求。实现流程如下:第一步:需发送请求,参数包括快递单号和获取快递公司的操作。
第二步:通过输入框绑定input事件获取快递单号。
第三步:通过actionSheet获取快递公司信息。
第四步:点击查询事件触发wx:request请求,传递已获取的快递公司和单号。
第五步:成功查询后处理数据,将结果数组通过setData方法展示在页面上。
简单快速的五步流程,即可实现快递查询功能,轻松制作自己的快递查询页面。微信å°ç¨åºviewåµå¥ç¹å»äºä»¶
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<button catchtap="..." /> //åç»ä»¶
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<van-icon catchtap="..." />//ä¸è½ä½¿ç¨vantçbind:click
java小程序源代码,简单点的,多行,谁有啊
// My car shop.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
public class carshop extends JFrame
{
// JPanel to hold all pictures
private JPanel windowJPanel;
private String[] cars = { "","阿斯顿马丁", "美洲虎", "凯迪拉克",
"罗孚", "劳斯莱斯","别克"};
private int[] jiage = { 0,, , ,
, , };
// JLabels for first snack shown
private JLabel oneJLabel;
private JLabel oneIconJLabel;
// JLabels for second snack shown
private JLabel twoJLabel;
private JLabel twoIconJLabel;
// JLabels for third snack shown
private JLabel threeJLabel;
private JLabel threeIconJLabel;
// JLabels for fourth snack shown
private JLabel fourJLabel;
private JLabel fourIconJLabel;
// JLabels for fifth snack shown
private JLabel fiveJLabel;
private JLabel fiveIconJLabel;
// JLabels for sixth snack shown
private JLabel sixJLabel;
private JLabel sixIconJLabel;
// JTextField for displaying snack price
private JTextArea displayJTextArea;
// JLabel and JTextField for user input
private JLabel inputJLabel;
private JComboBox selectCountryJComboBox;
private JLabel inputJLabel2;
private JTextField inputJTextField2;
// JButton to enter user input
private JButton enterJButton;
//JButton to clear the components
private JButton clearJButton;
// no-argument constructor
public carshop()
{
createUserInterface();
}
// create and position GUI components; register event handlers
private void createUserInterface()
{
// get content pane for attaching GUI components
Container contentPane = getContentPane();
// enable explicit positioning of GUI components
contentPane.setLayout( null );
// set up windowJPanel
windowJPanel = new JPanel();
windowJPanel.setBounds( , , , );
windowJPanel.setBorder( new LineBorder( Color.BLACK ) );
windowJPanel.setLayout( null );
contentPane.add( windowJPanel );
// set up oneIconJLabel
oneIconJLabel = new JLabel();
oneIconJLabel.setBounds( , , , );
oneIconJLabel.setIcon( new ImageIcon( "images/阿斯顿马丁.jpg" ) );
windowJPanel.add( oneIconJLabel );
// set up oneJLabel
oneJLabel = new JLabel();
oneJLabel.setBounds( , , , );
oneJLabel.setText( "阿斯顿马丁" );
oneJLabel.setHorizontalAlignment( JLabel.CENTER );
windowJPanel.add( oneJLabel );
// set up twoIconJLabel
twoIconJLabel = new JLabel();
twoIconJLabel.setBounds( , , , );
twoIconJLabel.setIcon( new ImageIcon( "images/美洲虎.jpg" ) );
windowJPanel.add( twoIconJLabel );
// set up twoJLabel
twoJLabel = new JLabel();
twoJLabel.setBounds( , , , );
twoJLabel.setText( "美洲虎" );
twoJLabel.setHorizontalAlignment( JLabel.CENTER );
windowJPanel.add( twoJLabel );
// set up threeIconJLabel
threeIconJLabel = new JLabel();
threeIconJLabel.setBounds( , , , );
threeIconJLabel.setIcon( new ImageIcon(
"images/凯迪拉克.jpg" ) );
windowJPanel.add( threeIconJLabel );
// set up threeJLabel
threeJLabel = new JLabel();
threeJLabel.setBounds( , , , );
threeJLabel.setText( "凯迪拉克" );
threeJLabel.setHorizontalAlignment( JLabel.CENTER );
windowJPanel.add( threeJLabel );
// set up fourIconJLabel
fourIconJLabel = new JLabel();
fourIconJLabel.setBounds( , , , );
fourIconJLabel.setIcon( new ImageIcon( "images/罗孚.jpg" ) );
windowJPanel.add( fourIconJLabel );
// set up fourJLabel
fourJLabel = new JLabel();
fourJLabel.setBounds( , , , );
fourJLabel.setText( "罗孚" );
fourJLabel.setHorizontalAlignment( JLabel.CENTER );
windowJPanel.add( fourJLabel );
// set up fiveIconJLabel
fiveIconJLabel = new JLabel();
fiveIconJLabel.setBounds( , , , );
fiveIconJLabel.setIcon( new ImageIcon(
"images/劳斯莱斯.jpg" ) );
windowJPanel.add( fiveIconJLabel );
// set up fiveJLabel
fiveJLabel = new JLabel();
fiveJLabel.setBounds( , , , );
fiveJLabel.setText( "劳斯莱斯" );
fiveJLabel.setHorizontalAlignment( JLabel.CENTER );
windowJPanel.add( fiveJLabel );
// set up sixIconJLabel
sixIconJLabel = new JLabel();
sixIconJLabel.setBounds( , , , );
sixIconJLabel.setIcon( new ImageIcon( "images/别克.jpg" ) );
windowJPanel.add( sixIconJLabel );
// set up sixJLabel
sixJLabel = new JLabel();
sixJLabel.setBounds( , , , );
sixJLabel.setText( "别克" );
sixJLabel.setHorizontalAlignment( JLabel.CENTER );
windowJPanel.add( sixJLabel );
// set up enterJButton
enterJButton = new JButton();
enterJButton.setBounds( , , , );
enterJButton.setText( "Enter" );
contentPane.add( enterJButton );
enterJButton.addActionListener(
new ActionListener() // anonymous inner class
{
// event handler called when enterJButton is clicked
public void actionPerformed( ActionEvent event )
{
enterJButtonActionPerformed( event );
}
} // end anonymous inner class
); // end call to addActionListener
// set up clearJButton
clearJButton = new JButton();
clearJButton.setBounds( , , , );
clearJButton.setText( "Clear" );
contentPane.add( clearJButton );
// set up inputJLabel
inputJLabel = new JLabel();
inputJLabel.setBounds( , , , );
inputJLabel.setText( "Please make selection:" );
contentPane.add( inputJLabel );
selectCountryJComboBox = new JComboBox( cars );
selectCountryJComboBox.setBounds( , , , );
selectCountryJComboBox.setMaximumRowCount( 3 );
contentPane.add( selectCountryJComboBox );
// set up inputJTextField
inputJLabel2 = new JLabel();
inputJLabel2.setBounds( , , , );
inputJLabel2.setText( "Input the Numble:" );
contentPane.add( inputJLabel2 );
// set up inputJTextField
inputJTextField2 = new JTextField();
inputJTextField2.setBounds( , , , );
inputJTextField2.setHorizontalAlignment( JTextField.RIGHT );
contentPane.add( inputJTextField2 );
clearJButton.addActionListener(
new ActionListener() // anonymous inner class
{
// event handler called when clearJButton is clicked
public void actionPerformed( ActionEvent event )
{
clearJButtonActionPerformed( event );
}
} // end anonymous inner class
);
// set up displayJTextField
displayJTextArea = new JTextArea();
displayJTextArea.setBounds( , ,, );
displayJTextArea.setEditable( false );
contentPane.add( displayJTextArea );
// set properties of application's window
setTitle( "My car Shop" ); // set title bar string
setSize( , ); // set window size
setVisible( true ); // display window
} // end method createUserInterface
private void clearJButtonActionPerformed( ActionEvent event )
{
// clear the JTextFields
inputJTextField2.setText( "" );
displayJTextArea.setText("");
} // end method clearJButtonActionPerformed
private void enterJButtonActionPerformed( ActionEvent event )
{
double z;
double c;
int x;
int y;
x=selectCountryJComboBox.getSelectedIndex();
y=Integer.parseInt(inputJTextField2.getText());
double discountRate;
int amount = Integer.parseInt( inputJTextField2.getText());
switch (amount/5)
{
case 0:
discountRate = 0;
break;
case 1:
discountRate = 1;
break;
case 2:
discountRate = 2;
break;
case 3:
discountRate = 3;
break;
default:
discountRate = 4;
} // end switch statement
c=1-discountRate/;
z=jiage[x]*y*c;
displayJTextArea.append("你选择的是:"+cars[x]+";"+
"它的单价是:"+jiage[x]+";" +"你购买该产品的数量是:"+y+"," +"\n"+"该数量的折扣是:"
+discountRate + " %"+";"+"本次消费的总价格是:"+z+"元"+"!"+"\n");
}
public static void main( String args[] )
{
carshop application = new carshop();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
} // end method main
} // end class carshop