文件管理器练习

Objective-c

#import <Foundation/Foundation.h>
#import "MyFileManager.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        MyFileManager *manager = [[MyFileManager alloc] init];
        [manager managerFileForPath:@"/Users/qianfeng/Desktop/action"];
    }
    return 0;
}

#import <Foundation/Foundation.h>
@interface MyFileManager : NSObject
-(void)managerFileForPath:(NSString *)path;
@end

#import "MyFileManager.h"
/*
 4.设计一个文件管理器
    实现功能:
    将dir目录下的所有文件分类管理
    dir目录下有各种后缀的文件  以及没有尾缀的文件
    检索目录,按照后缀名创建子目录,把该后缀名的文件全丢进去
    没有尾缀的创建一个other目录,把没有尾缀的文件全丢进去
    不需要支持双尾缀
    不用管理文件夹
 */
/*
 1.创建一个管理器类
 2.遍历目录(浅遍历)
 3.干掉文件夹
 4.取出后缀,将文件名和后缀做关联
 5.创建目录
 6.移动文件
 */
@interface MyFileManager ()
@property (nonatomic,strong) NSMutableDictionary *sufAndFileDic;
@end
@implementation MyFileManager
-(void)managerFileForPath:(NSString *)path
{
    //创建文件管理器
    NSFileManager *manager = [NSFileManager defaultManager];
    //浅遍历目录
    NSArray *contents = [manager contentsOfDirectoryAtPath:path error:nil];
    //删除目录
    contents = [self deleteDirectoryInContents:contents withPath:path];
    //获取后缀
    NSArray *suffixs = [self suffixForFiles:contents];
    //利用后缀创建目录
    [self createDirectoryBySuffixs:suffixs withPath:path];
    //开始移动文件
    for(int i = 0; i < suffixs.count; i++)
    {
        //取后缀
        NSString *suf = suffixs[i];
        //取后缀对应的所有文件
        NSArray *files = [_sufAndFileDic allKeysForObject:suf];
        //遍历取出来的所有文件
        for(id obj in files)
        {
            [manager moveItemAtPath:[NSString stringWithFormat:@"%@/%@",path,obj] toPath:[NSString stringWithFormat:@"%@/%@/%@",path,suf,obj] error:nil];
        }
    }
    NSLog(@"%@",suffixs);
}
-(void)createDirectoryBySuffixs:(NSArray *)suffixs withPath:(NSString *)path
{
    NSFileManager *manager = [NSFileManager defaultManager];
    for(NSString *obj in suffixs)
    {
        NSString *newPath = [NSString stringWithFormat:@"%@/%@",path,obj];
        [manager createDirectoryAtPath:newPath withIntermediateDirectories:NO attributes:nil error:nil];
    }
}
//获取后缀,并返回后缀的数组
-(NSArray *)suffixForFiles:(NSArray *)files
{
    NSMutableArray *array = [NSMutableArray array];
    if(!self.sufAndFileDic)
    {
        self.sufAndFileDic = [NSMutableDictionary dictionary];
    }
    for(NSString *obj in files)
    {
        //检查是否有.
        NSRange range = [obj rangeOfString:@"." options:NSBackwardsSearch];
        if(range.location != NSNotFound)
        {
            //有后缀
            NSString *suf = [obj substringFromIndex:range.location+1];
            if(![array containsObject:suf])
            {
                [array addObject:suf];
            }
            [_sufAndFileDic setObject:suf forKey:obj];
        }
        else
        {
            //没有后缀
            if(![array containsObject:@"other"])
            {
                [array addObject:@"other"];
            }
            [_sufAndFileDic setObject:@"other" forKey:obj];
        }
    }
    return array;
}
-(NSArray *)deleteDirectoryInContents:(NSArray *)array withPath:(NSString *)path
{
    NSFileManager *manager = [NSFileManager defaultManager];
    BOOL isDir = NO;
    NSMutableArray *newContents = [NSMutableArray array];
    for(int i = 0; i < array.count; i++)
    {
        NSString *oneFile = array[i];
        [manager fileExistsAtPath:[NSString stringWithFormat:@"%@/%@",path,oneFile] isDirectory:&isDir];
        if(!isDir)
        {
            [newContents addObject:oneFile];
        }
    }
    return newContents;
}
@end