我知道swift有引用类型和值类型。我知道Int是一种价值类型。但是如何存储对整数的引用呢？
this.Invoke(new Action(() => {this.UpdateUserList();}));
我尝试使用盒装类型，我尝试使用Int数组，但是它们都不能用于保存对整数的引用。
我想我可以写自己的
var x:Int = 1
var y:Int = x // I want y to reference x (not copy)
++y
println(x) // prints 1, but I want 2
似乎有点尴尬。
答案 0 :(得分：5)
不幸的是，在Swift中没有引用类型jest.dontMock('../server/isomorphic/stores/TrendingSocialStore.js');
jest.dontMock('../server/isomorphic/constants/AppEvent.js');
jest.dontMock('../server/isomorphic/dispatchers/AppDispatcher.js');
//jest.mock('../server/isomorphic/dispatchers/AppDispatcher.js');
TrendingSocialStore = require('../server/isomorphic/stores/TrendingSocialStore.js');
var AppDispatcher;
var AppEventConstants;
var AppEventConstants = require('../server/isomorphic/constants/AppEvent.js');
var AppDispatcher = require('../server/isomorphic/dispatchers/AppDispatcher.js');
console.log(AppDispatcher.register.mock)
//var callback = AppDispatcher.register.mock.calls[0][0]
trending = [{
type: 'sponsored',
business: {
name: 'Lorem Ipsum',
img: 'http://placehold.it/256x256',
category: 'Coffee'
},
sponsor: {
name: 'YP',
copy: 'Ad by YP<sup>SM</sup>'
}
}];
location = {
id: 1234,
name: 'University City, CA',
searchPath: 'university-city',
desc: 'University City\'s economy is anchored by the University of California, San Diego campus which forms the north part of the community. Southern areas of University City are composed of a mix of single family homes, a retirement community, and a few condominiums. The north-central area, known as the "UTC" area is composed of a dense mix of condominiums and apartment complexes.',
region: {
name: 'California',
abbr: 'CA'
}
};
// mock actions
var actionInit = {
actionType: AppEventConstants.INIT,
data: {
trending: trending,
location: location
}
};
describe('TrendingSocialStore', function() {
it('registers callback with the dispatcher', function() {
expect(AppDispatcher.register.mock.calls.length).toBe(1);
});
it('grabs trending and location data', function() {
callback(actionInit);
});
});
或类似的东西，所以你必须自己创建一个Box-Type。
例如通用的：
Integer答案 1 :(得分：-1)
您也可以使用闭包。我认为这些更好，因为它们更强大，也更具体。它们不仅存储引用，还指示如何使用引用。例如，
var x:Int = 1
var setx = { (a:Int) in x = a }
var getx = { x }
setx(getx() + 1)
println(x) // This will print 2
我不建议实际定义getx / setx。定义一个闭包，为您的应用程序执行特定任务。