[英]I could display API data in my console.log, but I can't setState with it . . . how can I setState? (fetch, React Native)
[英]how to fetch my syllables so I can console log them
JSON看起来像这样:
{
"main_object": {
"id": "new",
"getExerciseTitle": "TestAfterCodeCleaning",
"language": "nl_NL",
"application": "lettergrepen",
"main_object": {
"title": "TestAfterCodeCleaning",
"language": "nl_NL",
"exercises": [
{
"word": "testikels",
"syllables": [
"test",
"ikels",
"",
""
]
}
]
},
"dataType": "json"
}
}
这就是我尝试获取syllables
因此我可以console.log()
它们:
var jsyl = json.main_object.main_object.exercises.syllables;
但是问题是:这在我的console.log()
显示为未定义。 为什么以及如何?
完整的代码如下所示:
function prepareCheck() {
$.getJSON('json_files/jsonData_' + ID + '.json', function(json) {
$(document).on('keyup', '.syl-input', function() {
var syllableval = $(idsyll).val();
var jsyl = json.main_object.main_object.exercises.syllables;
});
});
}
注意:JSON有一个syllables
,因为我认为这对于您来说更容易阅读,但是应该采取什么措施来获取所有syllables
(如果有多个syllables
数组)。
使用exercises[0]
代替exercises
因为在这种情况下, exercises
是一个对象数组,在索引0
处只有一个项目。
var jsyl = json.main_object.main_object.exercises[0].syllables;
var json = { "main_object": { "id": "new", "getExerciseTitle": "TestAfterCodeCleaning", "language": "nl_NL", "application": "lettergrepen", "main_object": { "title": "TestAfterCodeCleaning", "language": "nl_NL", "exercises": [ { "word": "testikels", "syllables": [ "test", "ikels", "", "" ] } ] }, "dataType": "json" } } var jsyl = json.main_object.main_object.exercises[0].syllables; console.log(jsyl); // [ 'test', 'ikels', '', '' ]
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