OC基础5-NSString

            NSString的用法

1.直接的字符串

NSString *asString = @"123545";
NSLog(@"=====%@",asString);   //  输出用%@

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2.拼接的字符串
int age = 10;
int num = 5;
NSString *name = @"Wolfan";
int size = [name length];      //NSString的方法
NSString *newStr = [NSString stringWithFormat:@"my name is %@,age is %d, and num is %d",name,age,num];
NSLog(@"-----%@",newStr);