# 概述
v0.9.5+
JSService 和 Weex 实例在 JS Runtime 中并行运行。Weex 实例的生命周期可调用 JSService 生命周期。目前提供创建、刷新、销毁生命周期。
JSService 和前端世界里的 vendor.js 一样,它通常用于将每个页面中的重复js函数移至全局环境。
重要提醒: JSService 使用不当会导致内存增高或全局污染!
# 注册
# iOS
[WXSDKEngine registerService:@"SERVICE_NAME" withScript: @"SERVICE_JS_CODE" withOptions: @{}];
// or
[WXSDKEngine registerService:@"SERVICE_NAME" serviceScriptUrl: @"SERVICE_JS_URL" withOptions: @{}];
# Android
HashMap<String, String> options = new HashMap<>()
options.put("k1", "v1")
String SERVICE_NAME = "SERVICE_NAME"
String SERVICE_JS_CODE = "SERVICE_JS_CODE"
boolean result = WXSDKEngine.registerService(SERVICE_NAME, SERVICE_JS_CODE, options)
params of
options
Could have { create, refresh, destroy } lifecycle methods. In create method it should return an object of what variables or classes would be injected into theWeex
instance.
# Web
<script src="SERVICE_JS_CODE_URL"></script>
# 样例
service.register(SERVICE_NAME /* same string with native */, {
/**
* JSService lifecycle. JSService `create` will before then each instance lifecycle `create`. The return param `instance` is Weex protected param. This object will return to instance global. Other params will in the `services` at instance.
*
* @param {String} id instance id
* @param {Object} env device environment
* @return {Object}
*/
create: function(id, env, config) {
return {
instance: {
InstanceService: function(weex) {
var modal = weex.requireModule('modal')
return {
toast: function(title) {
modal.toast({ message: title })
}
}
}
},
NormalService: function(weex) {
var modal = weex.requireModule('modal')
return {
toast: function(title) {
modal.toast({ message: title })
}
}
}
}
},
/**
* JSService lifecycle. JSService `refresh` will before then each instance lifecycle `refresh`. If you want to reset variable or something on instance refresh.
*
* @param {String} id instance id
* @param {Object} env device environment
*/
refresh: function(id, env, config){
},
/**
* JSService lifecycle. JSService `destroy` will before then each instance lifecycle `destroy`. You can deleted variable here. If you doesn't detete variable define in JSService. The variable will always in the js runtime. It's would be memory leak risk.
*
* @param {String} id instance id
* @param {Object} env device environment
* @return {Object}
*/
destroy: function(id, env) {
}
})
Use JSService
<script>
var _InstanceService = new InstanceService(weex)
var _NormalService = new service.NormalService(weex)
module.exports = {
created: fucntion() {
// called modal module to toast something
_InstanceService.toast('Instance JSService')
_NormalService.toast('Normal JSService')
}
}
</script>