如何根据以下代码查询列表中的所有项目？
我想要的是能够说出来，给我所有属于import Foundation
import RealmSwift
class Item:Object {
dynamic var productName: String = ""
}
等的项目。
购物清单型号
Lists: Results<ShoppingList> (
[0] ShoppingList {
listName = List 1;
itemList = RLMArray <0x6180000feb80> (
[0] Item {
productName = Jitomates;
},
[1] Item {
productName = Grapes;
},
[2] Item {
productName = Oranges;
}
);
},
[1] ShoppingList {
listName = List 2;
itemList = RLMArray <0x6180000fec80> (
[0] Item {
productName = Tomatoes;
},
[1] Item {
productName = Grapes;
},
[2] Item {
productName = Oranges;
},
[3] Item {
productName = Green Peppers;
},
[4] Item {
productName = Apples;
}
);
}
)
项目模型
Results所有购物清单的输出（ realm.objects（ShoppingList.self））
List编辑：
以下查询接近我正在寻找的内容，除了它输出let itemsFromList2 = realm.objects(ShoppingList.self).filter("listName = 'List 2' ")，我只需要一个Items: Results<ShoppingList> (
[0] ShoppingList {
listName = List 2;
itemList = RLMArray <0x6000000e3500> (
[0] Item {
productName = Tomatoes;
},
[1] Item {
productName = Grapes;
},
[2] Item {
productName = Oranges;
},
[3] Item {
productName = Green Pappers;
},
[4] Item {
productName = Apples;
}
);
}
)
包含列表2中的所有项目
function link_events() {
document.getElementById("calculate").onclick = calculate;
}
function calculate() {
var years = document.getElementById('years');
var population = parseInt(document.getElementById('population').value);
var rate = parseInt(documet.getElementById('rate').value);
var table = '' +
'<table>' +
'<tr>' +
'<th><strong>Year</strong></th>' +
'<th><strong>Population</strong></th>' +
'<th><strong>Change</strong></th>' +
'</tr>' +
'';
var currentYear = 2017;
for (var i = currentYear; i < (currentYear+years); i++) {
var change = (population*rate)/100;
population += change;
table += '' +
'<tr>' +
'<td>' + i + '</td>' +
'<td>' + population.toFixed() + '</td>' +
'<td>' + change.toFixed() + '</td>' +
'</tr>' +
'';
}
table += '' +
'</table>' +
'';
document.getElementById('result').innerHTML = table;
}
<!doctype html>
<META HTTPEQUIV="CACHE-CONTROL" CONTENT="NO-CACHE">
<meta httpequiv="expires" content="0" />
<html lang="en">
<head>
<title> hw8 </title>
<link rel="stylesheet" href="hw8.css">
<script src="hw8.js"></script>
</head>
<body>
<form name="inputform">
<div id="input">
<h2> Population Growth </h2>
Years to forecast: <input type="text" value="<? print $_POST['years']; ?>" name="years"> <br/> <br/>
Current Population: <input type="text" value="<? print $_POST['population']; ?>" name="population"> <br/> <br/>
Growth Rate: <input type="text" value="<? print $_POST['rate']; ?>" name="rate"> <br/> <br/>
<div id="button"> <input type="submit" value="Calculate" id="calculate"> </div>
</div>
</form>
<div id="result"> </div>
</body>
</html>
答案 0 :(得分：1)
您从领域中获取Results，然后从Results获取领域对象。
我希望下面的代码可以帮助你。
let itemsFromList2 = realm.objects(ShoppingList.self).filter("listName = 'List 2'")
// Results acts like an Array
let shoppingList2 = itemsFromList2.first!
// itemList is what you need I think
let itemList = shoppingList2.itemList