iphone數組索引

Question

NSString *list = @"Norman, Stanley, Fletcher"; 
NSMutableArray *a2 = [[NSMutableArray alloc] init]; 
//a2= [list componentsSeparatedByString:@", "]; 


[a2 addObject:list]; 
//NSArray *listItems = [list componentsSeparatedByString:@", "]; 

NSLog(@"array is %@",a2); 
NSLog(@"array o %@",a2[0]); 

如何獲得a2 [0] =諾曼，a2 [1] =斯坦利???

Answer 1

試圖

此

NSArray *listItems = [list componentsSeparatedByString:@", "]; 
    [a2 addObject:list]; 
    NSLog(@"array o %@", [a2 objectAtIndex:0]); 

Answer 2

當您創建可變數組時，您必須將對象添加到數組中。你不能設置可變數組等於正常陣列（其返回由componentsSeparatedByString :)

 
NSString *list = @"Norman, Stanley, Fletcher"; 
NSMutableArray *a2 = [[NSMutableArray alloc] init]; 
[a2 addObjectsFromArray:[list componentsSeparatedByString:@", "]]; 

NSLog(@"array is %@",a2); 
NSLog(@"array o %@",[a2 objectAtIndex:0]);