摘要：NSArray *array1 = [NSArray alloc]init];NSArray *array2 = [NSArray alloc]init];[array1 addobject: array2];//意思是把array2作为array1的元素[array1 addobjectsFrom... 阅读全文

摘要：NSDictionary *dic = [NSDictionary alloc]init];NSArray *array = [dic allvalues];或者 NSArray *array = [dic allkeys]; 阅读全文