IOS array.next例外

Question

我剛開了異常，同時運行下面的代碼，代碼是

NSMutableArray *mutablearray = [NSMutableArray array]; 

    data=[MyDatabase new]; 
    imagearray=[data OpenMyDatabase:@"SELECT pic_name FROM interior":@"pic_name"]; 

    while([imagearray next]) /////Getting exception here 
    { 
     [mutablearray addObject:imagearray]; 
    } 

和我的例外是，

- [__ NSArrayM明]：無法識別的選擇發送到實例 是什麼這背後的確切原因？

Answer 1

嘗試這個

NSMutableArray *mutablearray = [NSMutableArray array]; 

data=[MyDatabase new]; 
imagearray=[data OpenMyDatabase:@"SELECT pic_name FROM interior":@"pic_name"]; 

NSEnumerator *e = [imagearray objectEnumerator]; 
id object; 
while (object = [e nextObject]) { 
    [mutablearray addObject:object]; 

} 

Answer 2

您沒有正確枚舉。從NSArraydocs

實施例：

NSEnumerator *enumerator = [myArray objectEnumerator]; 
id anObject; 

while (anObject = [enumerator nextObject]) { 
    /* code to act on each element as it is returned */ 
} 

Answer 3

嘗試

[mutablearray addObjectsFromarray:imagearray]; 

代替

while([imagearray next]) 
{ 
    [mutablearray addObject:imagearray]; 
}