Object-C,文件路径API

犀利吐槽

1.同样都是“文件和目录操作",java中，就用java.util.File一个类，就封装了很多API，而Object-C搞了这么多类和函数。具体原因，有待分析啊。

2.明明是NSString，字符串操作，怎么出现了”pathComponents“等操作文件路径相关的方法，很奇怪的赶脚。

3.stringByAppendingString，这函数的名字有点长啊。

4.总体感觉，Object-C的语法比Java复杂一些，码代码的效率低了不少。

/

/
//  main.m
//  FilePathUtil
//
//  Created by fansunion on 15/11/29.
//  Copyright (c) 2015年 demo. All rights reserved.
//

#import <Foundation/Foundation.h>

//演示文件路径API
int main(int argc, const char * argv[]) {
    @autoreleasepool {
       NSString *fileName =@"path.m";
        NSFileManager *fm;
        NSString *path,*tempDir,*extention,*homeDir,*fullPath;
        NSArray *components;

        fm =[NSFileManager defaultManager];
        //临时目录
        tempDir = NSTemporaryDirectory();
        NSLog(@"The tempDir is %@",tempDir);

        //提取基本目录
        path =[fm currentDirectoryPath];
        NSLog(@"The base dir is %@",[path lastPathComponent]);

        //fileName在当前目录中的完整路径
        //这个地方有个问题
        //本地输出”/Users/fansunion/Library/Developer/Xcode/DerivedData/FilePathUtil-bvzjqehotbexooebruphtwcmqekz/Build/Products/Debugpath.m“
        //Debug和path.m之间没有”分隔符“/"，而书本中的例子是有的
        //最好还是手动加上，Java中也是没有这个分隔符，需要手动加上的
        fullPath =[path stringByAppendingString:fileName];
        NSLog(@"The fullPath is %@",fullPath);

        //获得文件扩展名
        extention = [fullPath pathExtension];
        NSLog(@"The extentions is %@",extention);

        //获得用户的主目录
        homeDir = NSHomeDirectory();
        NSLog(@"The home directory is %@",homeDir);

        //拆分路径为各个组成部分
        components = [homeDir pathComponents];
        for(path in components){
            NSLog(@"%@",path);
        }
    }
    return 0;
}

程序输出

2015-11-29 13:43:30.550 FilePathUtil[2861:179163] The tempDir is /var/folders/4q/5ylpds9n5n97bq_r41qvly4w0000gn/T/

2015-11-29 13:43:30.551 FilePathUtil[2861:179163] The base dir is Debug

2015-11-29 13:43:30.551 FilePathUtil[2861:179163] The fullPath is /Users/fansunion/Library/Developer/Xcode/DerivedData/FilePathUtil-bvzjqehotbexooebruphtwcmqekz/Build/Products/Debugpath.m

2015-11-29 13:43:30.551 FilePathUtil[2861:179163] The extentions is m

2015-11-29 13:43:30.552 FilePathUtil[2861:179163] The home directory is /Users/fansunion

2015-11-29 13:43:30.552 FilePathUtil[2861:179163] /

2015-11-29 13:43:30.552 FilePathUtil[2861:179163] Users

2015-11-29 13:43:30.553 FilePathUtil[2861:179163] fansunion

Program ended with exit code: 0