Class CCLoader

 cc.loader.addDownloadHandlers({
     // This will match all url with `.scene` extension or all url with `scene` type
     'scene' : function (url, callback) {}
 });

 cc.loader.addLoadHandlers({
     // This will match all url with `.scene` extension or all url with `scene` type
     'scene' : function (url, callback) {}
 });

addLoadHandlers

// Release all dependencies of a loaded prefab
let deps = cc.loader.getDependsRecursively(prefab);
cc.loader.release(deps);
// Retrieve all dependent textures
let deps = cc.loader.getDependsRecursively('prefabs/sample');
let textures = [];
for (let i = 0; i < deps.length; ++i) {
    let item = cc.loader.getRes(deps[i]);
    if (item instanceof cc.Texture2D) {
        textures.push(item);
    }
}

getDependsRecursively

isAutoRelease

cc.loader.load('a.png', function (err, tex) {
    cc.log('Result should be a texture: ' + (tex instanceof cc.Texture2D));
});
cc.loader.load('http://example.com/a.png', function (err, tex) {
    cc.log('Should load a texture from external url: ' + (tex instanceof cc.Texture2D));
});
cc.loader.load({url: 'http://example.com/getImageREST?file=a.png', type: 'png'}, function (err, tex) {
    cc.log('Should load a texture from RESTful API by specify the type: ' + (tex instanceof cc.Texture2D));
});
cc.loader.load(['a.png', 'b.json'], function (errors, results) {
    if (errors) {
        for (let i = 0; i < errors.length; i++) {
            cc.log('Error url [' + errors[i] + ']: ' + results.getError(errors[i]));
        }
    }
    let aTex = results.getContent('a.png');
    let bJsonObj = results.getContent('b.json');
});

load

loadResArray

// load the SpriteFrames from resources folder
let spriteFrames;
let urls = ['misc/characters/character_01', 'misc/weapons/weapons_01'];
cc.loader.loadResArray(urls, cc.SpriteFrame, function (err, assets) {
    if (err) {
        cc.error(err);
        return;
    }
    spriteFrames = assets;
    // ...
});

loadResDir

// load the texture (resources/imgs/cocos.png) and the corresponding sprite frame
cc.loader.loadResDir('imgs/cocos', function (err, assets) {
    if (err) {
        cc.error(err);
        return;
    }
    let texture = assets[0];
    let spriteFrame = assets[1];
});
// load all textures in "resources/imgs/"
cc.loader.loadResDir('imgs', cc.Texture2D, function (err, textures) {
    let texture1 = textures[0];
    let texture2 = textures[1];
});
// load all JSONs in "resources/data/"
cc.loader.loadResDir('data', function (err, objects, urls) {
    let data = objects[0];
    let url = urls[0];
});

// Release a texture which is no longer need
cc.loader.release(texture);
// Release all dependencies of a loaded prefab
let deps = cc.loader.getDependsRecursively('prefabs/sample');
cc.loader.release(deps);
// If there is no instance of this prefab in the scene, the prefab and its dependencies like textures, sprite frames, etc, will be freed up.
// If you have some other nodes share a texture in this prefab, you can skip it in two ways:
// 1. Forbid auto release a texture before release
cc.loader.setAutoRelease(texture2d, false);
// 2. Remove it from the dependencies array
let deps = cc.loader.getDependsRecursively('prefabs/sample');
let index = deps.indexOf(texture2d._uuid);
if (index !== -1)
    deps.splice(index, 1);
cc.loader.release(deps);

release

releaseAll

releaseAsset

releaseRes

releaseResDir

// auto release the texture event if "Auto Release Assets" disabled in current scene
cc.loader.setAutoRelease(texture2d, true);
// don't release the texture even if "Auto Release Assets" enabled in current scene
cc.loader.setAutoRelease(texture2d, false);
// first parameter can be url
cc.loader.setAutoRelease(audioUrl, false);

setAutoRelease

// auto release the SpriteFrame and its Texture event if "Auto Release Assets" disabled in current scene
cc.loader.setAutoReleaseRecursively(spriteFrame, true);
// don't release the SpriteFrame and its Texture even if "Auto Release Assets" enabled in current scene
cc.loader.setAutoReleaseRecursively(spriteFrame, false);
// don't release the Prefab and all the referenced assets
cc.loader.setAutoReleaseRecursively(prefab, false);

setAutoReleaseRecursively