用Swift修改数组中的对象？ [英] Modify Object in Array with Swift?

问题描述

我有数组：

pre $ var $ argDicContact = udContact.valueForKey（arrDicContact）as [NSDictionary]

我想更改数组中的一个联系人：

<$ p
if（dic.valueForKey（name）as String）== selectedName {
//如何将dic修改为newdic ：dic = newdic
}
}

我从0到arrDicContact.count-1。但它是如此没有退出...我喜欢循环（for ...在...）所以有人帮助我！ :)

解决方案

假设我们有这样的数组：

  var array：[NSDictionary] = [[name：foo]，[name：bar]，[name：baz] ] 
  

使用枚举

$ bic b






ar{
array [idx] = [name：newBar]
}
}

$ b $ p indices 的迭代：

 对于idx in indices（array）{
 if（array [idx] [name] as？String）==bar{
 array [idx] = [name：newBar ] 
} 
} 
  

更积极地，将整个<$ c $ map ：

  array = array.map {dic in 
 if（dic [name] as？String）==bar{
 return [name：newBar] 
} 
 return dic 
} 
  

I have array:

var arrDicContact = udContact.valueForKey("arrDicContact") as [NSDictionary]

and i want to change one contact in array:

 for let dicx:NSDictionary in arrDicContact{
     if (dic.valueForKey("name") as String) == selectedName{
        //how to modify dic to newdic: dic = newdic
     }
 }

i can use for loop with int i from 0 to arrDicContact.count-1. But it's so not exited... i like for loop (for...in...) So anybody help me! :) Tks a lot.

解决方案

Assuming we have the array like this:

var array:[NSDictionary] = [["name":"foo"],["name":"bar"],["name":"baz"]]

Using enumerate

for (idx, dic) in enumerate(array) {
    if (dic["name"] as? String) == "bar" {
        array[idx] = ["name": "newBar"]
    }
}

Iterate over indices:

for idx in indices(array) {
    if (array[idx]["name"] as? String) == "bar" {
        array[idx] = ["name": "newBar"]
    }
}

More aggressively, replace whole array using map:

array = array.map { dic in
    if (dic["name"] as? String) == "bar" {
        return ["name": "newBar"]
    }
    return dic
}

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