将 NSMutabledictionary 分配给 NSArray

Question

if(NSMutableDictionary[NSDictionary[@"key"]]==NULL) {
    NSMutableDictionary[NSDictionary[@"key"]]=[[NSArray alloc] init];
}

如何在 Swift 中声明它？

Answer 1

试试下面的代码：

let dict:NSDictionary = NSDictionary(dictionary: ["key1":"value1", "key2":"value2"])

let mutableDict:NSMutableDictionary = NSMutableDictionary(dictionary: ["dict":dict])

for(var i:Int=0; i < mutableDict.count; i++)
{
     let dic:NSDictionary? = mutableDict["dict"] as? NSDictionary

     if((dic != nil) && (dic?.valueForKey("key1") == nil))
     {
         dic?.setValue(NSArray(), forKey: "key1")
     }

}