便打告，敝司 iOS 研工程位有一位置，要求和 隔壁 topic 差不多，只是薪倍而且可程。

感的已都是基得不能再基的了，只有了考察面者的搜索和能力稍有些偏。因目改用 Swift 用不上些了所以便出 V2EX 社的各位考下意。目主要考察以下：

• 格式的性
• 方式是否雅
• 和之外的能力
• 解的

下面是面：

Language

1. Declare an NS_OPTIONS type BCLayoutAxis with following values:

• none
• horizontal
• vertical
• all

2. Create string representations for the values above

For debugging, we need string representations ("none", "horizontal", "vertical", "all") instead of original integer values. Use a graceful approach to represent them.

3. Declare a constant value (public/private)

Declare a constant named kBCMyConstant of NSString type with value of myConstantValue, public and private.

4. Create variadic method

5. Create a singleton

6. Concatenate string literals

7. Percentage encoding and decoding

8. Reverse an array

9. Filter objects in an array by value of a property

@interface MyObject : NSObject @property (nonatomic, assign, readonly) BOOL favorited; @end 

Given an NSArray instance containing several MyObject objects, put the objects of which favorited property are YES into a new NSArray instance.

10. Remove duplicated objects from an array

NSArray *myArray = @[@"a", @"b", @"c", @"a", @"d"]; 

Create a new NSArray instance from myArray containing @"a", @"b", @"c", @"d" only.

11. Determine if an NSDate instance is in this month

Runtime

1. Swizzle a method

- (void)myMethod; - (void)bc_myMethod; 

2. Determine the type of a property

@property (nonatomic, copy) NSString *myProperty; 

3. Determine the caller of a method

Stack, framework, address, class, function, line.