Object-C,文件路徑API

犀利吐槽

1.同樣都是“文件和目錄操作",java中，就用java.util.File一個類，就封裝了很多API，而Object-C搞了這麼多類和函數。具體原因，有待分析啊。

2.明明是NSString，字符串操作，怎麼出現了”pathComponents“等操作文件路徑相關的方法，很奇怪的趕腳。

3.stringByAppendingString，這函數的名字有點長啊。

4.總體感覺，Object-C的語法比Java復雜一些，碼代碼的效率低了不少。

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

#import 


//演示文件路徑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];
        //臨時目錄
        tempDir = NSTemporaryDirectory();
        NSLog(@"The tempDir is %@",tempDir);
        
        //提取基本目錄
        path =[fm currentDirectoryPath];
        NSLog(@"The base dir is %@",[path lastPathComponent]);
        
        //fileName在當前目錄中的完整路徑
        //這個地方有個問題
        //本地輸出”/Users/fansunion/Library/Developer/Xcode/DerivedData/FilePathUtil-bvzjqehotbexooebruphtwcmqekz/Build/Products/Debugpath.m“
        //Debug和path.m之間沒有”分隔符“/"，而書本中的例子是有的
        //最好還是手動加上，Java中也是沒有這個分隔符，需要手動加上的
        fullPath =[path stringByAppendingString:fileName];
        NSLog(@"The fullPath is %@",fullPath);
        
        //獲得文件擴展名
        extention = [fullPath pathExtension];
        NSLog(@"The extentions is %@",extention);
        
        //獲得用戶的主目錄
        homeDir = NSHomeDirectory();
        NSLog(@"The home directory is %@",homeDir);

        //拆分路徑為各個組成部分
        components = [homeDir pathComponents];
        for(path in components){
            NSLog(@"%@",path);
        }
    }
    return 0;
}

程序輸出

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