我使用这个排序描述符
NSArray *sortedObjects = [self.array sortedArrayUsingDescriptors:[NSArray arrayWithObjects:[NSSortDescriptor sortDescriptorWithKey:@"index" ascending:YES], nil]];
结果是 10 和 11 与 1 一起排序并放在 2 之前。
index is 1/12
index is 10/12
index is 11/12
index is 2/12
index is 3/12
index is 4/12
index is 5/12
index is 8/12
index is 9/12
如何避免这种情况?