NSString的创建

create

#progma mark  create NSString

void stringCreate(){

//char *s="A String";->c

NSString *str1=@"A String!";     //const, no memory management

NSString *str2=[[NSString alloc]init];

str2=@"A String!";

[str2 release];

NSString *str3=[[NSString alloc]initWithString:@"A String!"];

[str3 release];

NSString *str4=[[NSString alloc]initWithUTF8String:"A String!"];

// 传入一个C语言的字符串

[str4 release];

int i=10;

float height=18.0f;

NSString *str5=[[NSString alloc]initWithFormat:@"My age is %i and height is%.2f",age,height];

NSLog(@"str5 is %@",str5);

[str5 release];

}

//基本上以上方法都有对应的静态方法

//str3=nil;