如何訪問目標c中頭文件中定義的常量數組？

Question

我在頭文件中創建了常量多維數組。我想從實現中訪問數組。怎麼做？

的config.h

#define SORT_OPTIONS @[ \ 
     [ @3, @"Default", @"&sort=p.sort_order&order=ASC" ], \ 
     [ @1, @"Product Name (A - Z)", @"&sort=pd.name&order=ASC" ], \ 
     [ @2, @"Product Name (Z - A)", @"&sort=pd.name&order=DESC" ], \ 
     [ @3, @"Low price > High price", @"&sort=p.price&order=ASC" ], \ 
     [ @3, @"High price > Low price", @"&sort=p.price&order=DESC" ]] 

Config.m

#import "Config.h" 

@implementation Config 

+ (void) initSortOptionsAsSortObject{ 
    // I want access array from here 
} 

@end 

Answer 1

我覺得有什麼不對您的定義。

#define SORT_OPTIONS @[ \ 
    [ @3, @"Default", @"&sort=p.sort_order&order=ASC" ], \ 
    [ @1, @Product Name (A - Z)", @"&sort=pd.name&order=ASC" ], \ 
    [ @2, @"Product Name (Z - A)", @"&sort=pd.name&order=DESC" ], \ 
    [ @3, @"Low price > High price", @"&sort=p.price&order=ASC" ], \ 
    [ @3, @"High price > Low price", @"&sort=p.price&order=DESC" ]] 

子數組不包含@文字和您的@Product Name缺少"

嘗試是這樣的：

#define SORT_OPTIONS @[ \ 
@[ @3, @"Default", @"&sort=p.sort_order&order=ASC" ], \ 
@[ @1, @"Product Name (A - Z)", @"&sort=pd.name&order=ASC" ], \ 
@[ @2, @"Product Name (Z - A)", @"&sort=pd.name&order=DESC" ], \ 
@[ @3, @"Low price > High price", @"&sort=p.price&order=ASC" ], \ 
@[ @3, @"High price > Low price", @"&sort=p.price&order=DESC" ]] 

訪問它：SORT_OPTIONS[0]; // directly accessing the index

Answer 2

嘗試以下方法訪問你的常量數組，

在＃進口之後h文件，

#define SORT_OPTIONS @[ \ 
@[ @3, @"Default", @"&sort=p.sort_order&order=ASC" ], \ 
@[ @1, @"Product Name (A - Z)", @"&sort=pd.name&order=ASC" ], \ 
@[ @2, @"Product Name (Z - A)", @"&sort=pd.name&order=DESC" ], \ 
@[ @3, @"Low price > High price", @"&sort=p.price&order=ASC" ], \ 
@[ @3, @"High price > Low price", @"&sort=p.price&order=DESC" ]] 

在.m文件後，

+ (void) initSortOptionsAsSortObject{ 
    // I want access array from here 
    NSLog(@"your array - %@", SORT_OPTIONS); 
} 

訪問陣列元素，

for (int i = 0; i < SORT_OPTIONS.count; i++) { 
     NSLog(@"your array - %@", [SORT_OPTIONS objectAtIndex:i]); 
    } 

見附加的圖像，

希望它會幫助你。