cocoscreator 下载图片保存本地
test:function (url, callback) {
console.log('remote test');
var dirpath = jsb.fileUtils.getWritablePath() + 'img/';
var filepath = dirpath + 'picture' + '.png';
console.log('remote filepath: ' + filepath);
function loadEnd(){
.load(filepath, function(err, tex){
if( err ){
cc.error(err);
}else{
var spriteFrame = new (tex);
if( spriteFrame ){
spriteFrame.retain();
callback(spriteFrame);
}
}
});
}
if( jsb.fileUtils.isFileExist(filepath) ){
console.log('Remote is find' + filepath);
loadEnd();
return;
}
var saveFile = function(data){
if( typeof data !== 'undefined' ){
if( !jsb.fileUtils.isDirectoryExist(dirpath) ){
jsb.fileUtils.createDirectory(dirpath);
}
if( jsb.fileUtils.writeDataToFile( new Uint8Array(data) , filepath) ){
console.log('Remote write file succeed.');
loadEnd();
}else{
console.log('Remote write file failed.');
}
}else{
console.log('Remote download file failed.');
}
};
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
console.log("Remote " +xhr.readyState);
console.log("Remote " +xhr.status);
if (xhr.readyState === 4 ) {
if(xhr.status === 200){
xhr.responseType = 'arraybuffer';
saveFile(xhr.response);
}else{
saveFile(null);
}
}
}.bind(this);
xhr.open("GET", url, true);
xhr.send();
}