摘要：
NSString *path=@"1"; NSLog(@"%i",[path intValue]);//转换成整型，同理其他的转换 NSString *path=@"156464"; NSLog(@"%zi",[path length]);//返回的是字数 NSString *path=@"156464"; NSLog(@"%c",[path characterAtIndex:0]);//根据下表返回字符 NSString *path=@"156464"; 阅读全文
摘要：
NSString *path=@"/users/liyang/desktop/liyang.txt"; NSLog(@"%@",[path pathExtension]);//返回路径的拓展名NSString *path=@"/users/liyang/desktop/liyang.txt"; NSLog(@"%@",[path stringByDeletingPathExtension]);//删掉拓展名 NSString *path=@"/users/liyang/desktop/liyang.txt 阅读全文
摘要：
NSMutableArray *arry=[NSMutableArray array];//可变数组 [arry addObject:@"Users"]; [arry addObject:@"liysng"]; [arry addObject:@"desktop"]; NSString *path=[NSString pathWithComponents:arry]; NSLog(@"%@",path);//将数组里面的内容拼接城路径 NSArray *arry1=[path pathComponents];//将 阅读全文
摘要：
NSString *str=@"ChengDu"; str=[str uppercaseString];//变大写 NSLog(@"%@",str); str=[str lowercaseString];//变小写 NSLog(@"%@",str); str=[str capitalizedString];//首字母大写 NSLog(@"%@",str);[@"abc1" isEqualToString:@"abc"]//比较内容是否相等，地址也比较就直接用“＝＝” NSCo 阅读全文