用分类实现前缀后缀添加

来源：互联网发布：debian stretch软件源编辑：程序博客网时间：2024/06/07 10:50

我特别喜欢分类，而它的确是处理一些小问题的好帮手，在本例中使用分类来实现给一个NSString添加前后缀的方法。代码简单，就不多说了，可以帮助初学者掌握分类的使用方法。

////  NSString+PrefixAndSuffix.h//  AddPrefixAndSuffix////  Created by Mamong on 13-1-11.//  Copyright (c) 2013年 Mamong. All rights reserved.//#import <Foundation/Foundation.h>@interface NSString (PrefixAndSuffix)- (NSString *)addPrefix:(NSString *)prefix;- (NSString *)addSuffix:(NSString *)suffix;@end

////  NSString+PrefixAndSuffix.m//  AddPrefixAndSuffix////  Created by Mamong on 13-1-11.//  Copyright (c) 2013年 Mamong. All rights reserved.//#import "NSString+PrefixAndSuffix.h"@implementation NSString (PrefixAndSuffix)- (NSString *)addPrefix:(NSString *)prefix{    self = [NSString stringWithFormat:@"%@%@",prefix,self];    return self;}- (NSString *)addSuffix:(NSString *)suffix{    self = [NSString stringWithFormat:@"%@%@",self,suffix];    return self;}@end

////  main.m//  AddPrefixAndSuffix////  Created by Mamong on 13-1-11.//  Copyright (c) 2013年 Mamong. All rights reserved.//#import <Foundation/Foundation.h>#import "NSString+PrefixAndSuffix.h"int main(int argc, const char * argv[]){    @autoreleasepool {                // insert code here...        NSString *oldString = @"nice";        NSString *newString =[oldString addPrefix:@"Man"];        NSString *newString2 = [oldString addSuffix:@"Man"];        NSLog(@"%@,%@",newString,newString2);            }    return 0;}

2013-01-11 14:15:16.447 AddPrefixAndSuffix[554:303] Mannice,niceMan