日志
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2021-07-15 19:36
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复制代码两种方法
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1. 在定义数组的时候已经定义好数组的行数和列数。
2. 动态获取。
对于type array;形式的二维数组,可以通过计算sizeof获取行列数。
sizeof(array[0][0])为一个元素占用的空间,
sizeof(array[0])为一行元素占用的空间,
sizeof(array)为整个数组占用的空间,
于是:
行数(个数) = sizeof(array)/sizeof(array[0]);
列数 = sizeof(array[0])/sizeof(array[0][0]);
#define ArrayLength(Array) (sizeof(Array) / sizeof(Array[0]))
#define W 11
char s;
char s1;
char s2;
char s3;
char s4;
char s5;
char s6 ..
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2019-10-03 23:39
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import QtQuick 2.4
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import QtQuick.Controls 1.3
import QtQuick.Window 2.2
import QtQuick.Dialogs 1.2
import QtMultimedia 5.4
ApplicationWindow {
title: qsTr("简易视频播放器")
width: 640
height: 480
visible: true
Rectangle {
color: "black"
anchors.fill: parent
MediaPlayer {
id: mediaPlayer
source: "file:///storage/sdcard0/1.mp4"
autoPlay: true
}
Rectangle {
color: "black"
anchors.fill: parent
VideoOutput {
id: video
anchors.fill ..
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2019-09-13 17:26
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//单独设置背景图片
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QString path =QString("background-image:url(../storage/sdcard1/Music/image/%2.png)").arg(name);
song_pic->setStyleSheet(path);
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2019-09-11 05:15
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/*
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#include <QtNetwork>
#include <QHostInfo>
//方法一
QString localHostName = QHostInfo::localHostName();
//qDebug() <<"localHostName: "<<localHostName;
QHostInfo info = QHostInfo::fromName(localHostName);
//qDebug() <<"IP Address: "<<info.addresses();
QList<QHostAddress> address=info.addresses();
*/ //获取主机的IP地址
//QString Ip=QString(address.first().toString());
//方法二
/*QString detail="";
QList<QNetworkInterfa ..