按键值对NSMutableArray进行排序会引发异常

Question

我正在尝试使用以下结构对NSMutableArray进行排序：

(
{
    Code = "390954-150";
    Size = "35";
},
{
    Code = 790540MSO;
    Size = "30";
}
)

我尝试根据代码值进行排序，NSMutableArray称为arrayProduct：

//Sort array by Code
NSSortDescriptor *aSortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"Code" ascending:YES];
[arrayProduct sortUsingDescriptors:[NSArray arrayWithObject:aSortDescriptor]];
//

但是上面的代码抛出了以下异常：

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[__NSCFArray replaceObjectAtIndex:withObject:]: mutating method sent to immutable object'

Answer 1

您的arrayProduct看起来像NSArray。

尝试将其转换为NSMutableArray和：

NSMutableArray *mutableProducts = [NSMutableArray arrayWithArray:arrayProduct];
[mutableProducts sortUsingDescriptors:[NSArray arrayWithObject:aSortDescriptor]];