在Obj-C中等效于Java中传递对象类型的参数

Question

I'm trying to convert the below method in JAVA to Objective-C

public static Object[] appendArray(Object[] objs,String...strings) {

      Object[] result= new Object[objs.length+strings.length];

      System.arraycopy(strings, 0, result, 0, strings.length);

      System.arraycopy(objs, 0, result, strings.length, objs.length);

      return result;
   }

When I wanted to translate this to obj-c is it going to be something like this:

 +(NSArray *)appendArray:(NSArray *)objs andStringField:(NSArray *)strings{
   }

Is there an equivalent of System.arraycopy for Objective-C?

Answer 1

System.arraycopy makes a shallow copy so all it's doing is creating a new array. In your case you want to append 2 arrays together so you want to make an intermediate array that is mutable and then add the contents of both source arrays:

NSMutableArray *transient = [objs mutableCopy];
[transient addObjectsFromArray:strings];

return transient;