系统学习Objective-C<基础> 

 1 #import <Foundation/Foundation.h>
 2 BOOL areInstDifferent(int thing1, int thing2);
 3 NSString *boolString(BOOL yesNO);
 4 BOOL areInstDifferent(int thing1, int thing2)
 5 {
 6     if(thing1 == thing2)
 7     {
 8         return (NO);
 9     }
10     else
11    {
12         return (YES);
13    }
14 }
15 
16 NSString *boolString(BOOL yesNO)
17 {
18     if(yesNO == NO)
19     {
20          return (@"NO");
21     }
22     else
23     {
24          return (@"YES");
25     }
26 }
27 
28 int main(int argc, const char * argv[])
29 {
30      @autoreleasepool
31      {
32           BOOL areTheyDifferent;
33           areTheyDifferent = areIntsDifferent(5, 5);
34           NSLog(@"are %d and %d different? %@", 5, 5, boolString(areTheyDifferent));
35           areTheyDifferent = areIntsDifferent(23, 42);
36           NSLog(@"are %d and %d different? %@", 23, 42, boolString(areTheyDifferent));
37      }
38      return 0;
39 }

以上简单的代码就是对Objective-C的很好的解释，跟C语言区别不是很大，但也有不同，值得注意的就是：#import <Foundation/Foundation.h>、NSLog(@"");、BOOL的使用,要特别注意以上三个与C语言中的区别，不要掉进BOOL的陷阱中。

posted on 2012-04-19 11:23  呓语若梦半浮生  阅读(284)  评论(0)  编辑  收藏  举报

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