Foundation基础 --- NSString类

//1.类(属性,方法)
//2.能同通过这个类文件作为模板,来创建对象

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
@autoreleasepool {
//创建一个字符串
NSString *str = @"ding";
NSLog(@"str %@",str);

NSString * str1 = [NSString stringWithFormat:@"%@,%@",@"a",@"b"];
NSLog(@"str3 %@",str1);

//char*转换为NSString类型的代码如下
char * c = "www";
NSString * str3 = [[NSString alloc] initWithCString:(const char*)c encoding:NSASCIIStringEncoding];
NSLog(@"str3 %@",str3);
}
return 0;
}

/*
打印结果
2015-07-08 11:25:02.965 NSString-summer[2501:379281] str ding
2015-07-08 11:25:02.966 NSString-summer[2501:379281] str3 a,b
2015-07-08 11:25:02.966 NSString-summer[2501:379281] str3 www
*/