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。
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//  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 Debug2015-11-29 13:43:30.551 FilePathUtil[2861:179163] The fullPath is /Users/fansunion/Library/Developer/Xcode/DerivedData/FilePathUtil-bvzjqehotbexooebruphtwcmqekz/Build/Products/Debugpath.m2015-11-29 13:43:30.551 FilePathUtil[2861:179163] The extentions is m2015-11-29 13:43:30.552 FilePathUtil[2861:179163] The home directory is /Users/fansunion2015-11-29 13:43:30.552 FilePathUtil[2861:179163] /2015-11-29 13:43:30.552 FilePathUtil[2861:179163] Users2015-11-29 13:43:30.553 FilePathUtil[2861:179163] fansunionProgram ended with exit code: 0