將NSMutableDictionary分配給NSArray

Question

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

如何將此聲明聲明爲Swift？

Answer 1

試試下面的代碼：

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") 
    } 

}