狂奔的蜗牛

摘要： 温故知新，常用常新//1、创建常量字符串。NSString *astring = @"This is a String!";//2、创建空字符串，给予赋值。NSString *astring = [[NSString alloc] init]; astring = @"This is a String!"; [astring release]; NSLog(@"astring:%@",astring);//NSString *astring = [[NSString alloc] init]; NSLog(@"0x%.8x& 阅读全文