Objective-c NSString和char*之间的转换

Objective-c  NSString和char*之间的转换 

 NSString *string_content = "I'm jordy";
 char *char_content = [string_content cStringUsingEncoding:NSASCIIStringEncoding];

char*转换为NSString类型的代码如下： 

 char char_array[1024];
 NSString *string_content = [[NSString alloc] initWithCString:(const char*)char_array
 encoding:NSASCIIStringEncoding];

实例：将NSString类型的16进制数转为int类型。 
步骤： 
1、将NSString类型转换为char类型； 
2、通过sscanf()函数得到int类型16进制数的值 

 int color;
 NSString *color_string = @"0xff0000";
 char *color_char = [color_string cStringUsingEncoding:NSASCIIStringEncoding];
 sscanf(color_char,"%x",&color);

 NSLog(@"color: %i",color);

文章出处： http://jordy.easymorse.com/?p=768