ios - 数组的属性观察器,获取更改的索引
<p><p>我有一个<code>数组</code>:</p>
<pre><code>let myArray = ()
</code></pre>
<p>我想添加一个 <code>didSet { }</code>,它知道实际更改的数组索引。</p></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>你可以试试这个-</p>
<pre><code>let myArray = ()
class YourClassName
{
var array =
{
didSet
{
let changedIndexes = zip(array, myArray).map{$0 != $1}.enumerated().filter{$1}.map{$0.0}
print("Changed indexes: \(changedIndexes)")
}
}
}
let demo = YourClassName()
demo.array =
//prints:Changed indexes:
</code></pre></p>
<p style="font-size: 20px;">关于ios - 数组的属性观察器,获取更改的索引,我们在Stack Overflow上找到一个类似的问题:
<a href="https://stackoverflow.com/questions/49587294/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/49587294/
</a>
</p>
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