数组处理

1.        //合并字符串数组 
1.         NSString *str = [array componentsJoinedByString:@"|"]; 
2.         //字符串切割成数组 
3.         NSArray *array=[str componentsSeparatedByString:@"|"]; 
4.         //可变数组元素删除 
5.         [array removeObjectAtIndex:1]; 
1.         //取指定索引元素 
1.         [array objectAtIndex:1]
2.