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[英]Installing React Native Map. AIRMap not found in UIManager
[英]react like button for map. json data
是的你好,
我该如何为like button
做点赞like button
?
我以为id可以通过地图做到。 到{this.state.count}
即 像{l.this.state.count}
在这种情况下,就像其他项目一样,但是没有。
/** @jsx React.DOM */
// Let's create a "real-time search" component
var SearchExample = React.createClass({
getInitialState: function(){
return {
searchString: '',
count: 0
};
},
incrementCount: function() {
this.setState({
count: this.state.count + 1
});
},
handleChange: function(e){
// With setState the current and previous states are merged.
this.setState({
searchString:e.target.value
});
},
render: function() {
var libraries = this.props.items,
searchString = this.state.searchString.trim().toLowerCase();
if(searchString.length > 0){
console.log('searching');
// We are searching. Filter the results.
libraries = libraries.filter(function(l){
return l.name.toLowerCase().match( searchString );
});
}
return <div>
<input type="text" className="form-control" value={this.state.searchString} onChange={this.handleChange} placeholder="Type here" />
<div className="row">
{ libraries.map(function(l){
return <div className="col-xs-4 text-center">
<h5>{l.name} </h5>
<img src="http://placehold.it/350x150" className="img-responsive" />
<a href={l.url}>{l.url}</a>
<p>likes x</p>
<button className="btn btn-primary" onClick={this.incrementCount}>like</button>
</div>
})}
</div>
</div>;
} // render end
});
var libraries = [
{ name: 'Backbone.js', likes: 3, comments: 5, url: 'http://documentcloud.github.io/backbone/'},
{ name: 'AngularJS', likes: 3, comments: 5, url: 'https://angularjs.org/'},
{ name: 'jQuery', likes: 3, comments: 5, url: 'http://jquery.com/'},
{ name: 'Prototype', likes: 3, comments: 5, url: 'http://www.prototypejs.org/'},
{ name: 'React', likes: 3, comments: 5, url: 'http://facebook.github.io/react/'},
{ name: 'Ember', likes: 3, comments: 5, url: 'http://emberjs.com/'},
{ name: 'Knockout.js', likes: 3, comments: 5, url: 'http://knockoutjs.com/'},
{ name: 'Dojo', likes: 3, comments: 5, url: 'http://dojotoolkit.org/'},
{ name: 'Mootools', likes: 3, comments: 5, url: 'http://mootools.net/'},
{ name: 'Underscore', likes: 3, comments: 5, url: 'http://documentcloud.github.io/underscore/'},
{ name: 'Lodash', likes: 3, comments: 5, url: 'http://lodash.com/'},
{ name: 'Moment', likes: 3, comments: 5, url: 'http://momentjs.com/'},
{ name: 'Express', likes: 3, comments: 5, url: 'http://expressjs.com/'},
{ name: 'Koa', likes: 3, comments: 5, url: 'http://koajs.com/'},
];
// Render the SearchExample component on the page
React.renderComponent(
<SearchExample items={ libraries } />,
document.getElementById('content')
);
有几种方法可以实现您想要的。 在下面的示例中,我选择增加原始libraries
变量的like计数,然后再forceUpdate
。 如果您遵循的是磁通量体系结构,则可能需要执行一个增量操作来执行此操作,该操作将更新LibraryStore,然后导致更改事件。
您还可以选择为library
项目创建一个新组件,并像评论者所说的like
,将其状态保持在like
属性中。
前进的方式可能取决于您将要增加的计数(计数)接下来要做什么。
前面已经说过,这是一个工作示例,其中每次单击按钮时计数都会增加:
jsFiddle: http : //jsfiddle.net/bftxz5n1/
/** @jsx React.DOM */
// Let's create a "real-time search" component
var SearchExample = React.createClass({
getInitialState: function(){
return {
searchString: '',
count: 0
};
},
incrementCount: function(l) {
l.likes = l.likes + 1;
this.forceUpdate();
},
handleChange: function(e){
// With setState the current and previous states are merged.
this.setState({
searchString:e.target.value
});
},
render: function() {
var libraries = this.props.items,
searchString = this.state.searchString.trim().toLowerCase();
if(searchString.length > 0){
console.log('searching');
// We are searching. Filter the results.
libraries = libraries.filter(function(l){
return l.name.toLowerCase().match( searchString );
});
}
return <div>
<input type="text" className="form-control" value={this.state.searchString} onChange={this.handleChange} placeholder="Type here" />
<div className="row">
{ libraries.map(function(l){
return <div className="col-xs-4 text-center">
<h5>{l.name} </h5>
<img src="http://placehold.it/350x150" className="img-responsive" />
<a href={l.url}>{l.url}</a>
<p>likes {l.likes}</p>
<button className="btn btn-primary" onClick={this.incrementCount.bind(this,l)}>like</button>
</div>
}.bind(this))}
</div>
</div>;
} // render end
});
var libraries = [
{ name: 'Backbone.js', likes: 3, comments: 5, url: 'http://documentcloud.github.io/backbone/'},
{ name: 'AngularJS', likes: 3, comments: 5, url: 'https://angularjs.org/'},
{ name: 'jQuery', likes: 3, comments: 5, url: 'http://jquery.com/'},
{ name: 'Prototype', likes: 3, comments: 5, url: 'http://www.prototypejs.org/'},
{ name: 'React', likes: 3, comments: 5, url: 'http://facebook.github.io/react/'},
{ name: 'Ember', likes: 3, comments: 5, url: 'http://emberjs.com/'},
{ name: 'Knockout.js', likes: 3, comments: 5, url: 'http://knockoutjs.com/'},
{ name: 'Dojo', likes: 3, comments: 5, url: 'http://dojotoolkit.org/'},
{ name: 'Mootools', likes: 3, comments: 5, url: 'http://mootools.net/'},
{ name: 'Underscore', likes: 3, comments: 5, url: 'http://documentcloud.github.io/underscore/'},
{ name: 'Lodash', likes: 3, comments: 5, url: 'http://lodash.com/'},
{ name: 'Moment', likes: 3, comments: 5, url: 'http://momentjs.com/'},
{ name: 'Express', likes: 3, comments: 5, url: 'http://expressjs.com/'},
{ name: 'Koa', likes: 3, comments: 5, url: 'http://koajs.com/'},
];
// Render the SearchExample component on the page
React.renderComponent(
<SearchExample items={ libraries } />,
document.getElementById('content')
);
那是你的意思吗?
如果我是对的,您必须将计数移到库本身,理想情况下它应该是另一个组件,但是为了避免过多更改代码,我只将喜欢的库的索引绑定到了incrementCount
方法并使用了它检索接收类似的库。
顺便说一句,搜索仍然中断,如果库是可变的,则它应该处于状态,否则无法通过incrementCount
方法检索正确的库。
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