摘要： //一、NSString/*----------------创建字符串的方法----------------*///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);//3、在以上方法中，提升速度:initWit 阅读全文