Question

我已声明以下常量有效：

NSString * const LETTER_SELECTED[] = {@"A",@"B",@"C",@"D",@"E",@"F"};

现在我想声明一个类似的常量，但是维度2不起作用：

NSString * const LETTER_SELECTED[][] = {
                        {@"A",@"uc"},
                        {@"b",@"lc"},
                        {@"c",@"lc"},
                        {@"d",@"lc"},
                        {@"E",@"uc"},
                        {@"f",@"lc"}};

我是C程序员，知道如何在Objective-C中声明这个吗？

提前致谢

Answer 1

这是NSArray在objective-c中的样子。

@interface MyClass ()
@property (nonatomic, strong) NSArray *my2DArrayOfStrings;
@end

@implementation MyClass
- (instancetype)init {
    self = [super init];
    self.my2DArrayOfStrings = @[
                                @[ @"A", @"uc" ],
                                @[ @"b", @"lc" ],
                                @[ @"c", @"lc" ],
                                @[ @"d", @"lc" ],
                                ];
    return self;
}
@end

但是，在您的示例中，似乎就像真正想要的是NSDictionary。

@interface MyClass ()
@property (nonatomic, strong) NSDictionary *stringDictionary;
@end

@implementation MyClass
- (instancetype)init {
    self = [super init];
    self.stringDictionary = @{
                              @"A" : @"uc",
                              @"b" : @"lc",
                              @"c" : @"lc",
                              @"d" : @"lc",
                              };
    return self;
}
@end

如何在目标C中定义二维const字符串数组

1 个答案: