HTML5+ 学习笔记3 storage.增删改查

//插入N条数据

function setItemFun( id ) {  //循环插入100调数据  var dataNum = new Number(id);  for ( var i=0; i<dataNum; i++ ) {    plus.storage.setItem( "key"+i, "value"+i );  }  var length = getLengthFun();  outSet( "数据存储成功，存储了"+length+"条数据；" );}function getLengthFun(){  return plus.storage.getLength();}

//查询所有数据
function getAllItem(){  outSet( "获取数据：" );  var itemLength = getLengthFun();  for ( var i=0; i < itemLength; i++ ) {    var key = plus.storage.key(i);     var value = plus.storage.getItem(key);     outLine( "key:"+key+"-->value:"+value );  };}

//删除部分Item
function delItem() {  outSet( "删除数据：" );  var itemLength = getLengthFun();  for (var i=0; i < itemLength; i+=2) {    var key = plus.storage.key(i);     plus.storage.removeItem(key);  };  var itemNo = getLengthFun();  outLine( "移除了"+(itemLength-itemNo)+"条数据" );}

//清除所有内容
function clearAllItem(){  plus.storage.clear();  var num = getLengthFun();  if ( num == 0 ) {    outSet( "storage数据清除成功！" );  }else{    outSet( "storage数据清除失败！" );  }}

//修改前五条数据的内容
function modifyTopFive(){  outSet( "修改前的数据是：" );  for (var i=0; i < 5; i++) {      var key = plus.storage.key(i),value = plus.storage.getItem(key);     outLine( "key:"+key+"-->value:"+value );    plus.storage.setItem( key, "新数据值>>"+i );  };  outLine( "修改后的数据是：" );  for (var i=0; i < 5; i++) {    var key = plus.storage.key(i),value = plus.storage.getItem(key);    outLine( "key:"+key+"-->value:"+value );  };}

原标题：HTML5+ 学习笔记3 storage.增删改查

关键词：HTML