iOS-沙盒路径总结、文件管理NSFileManager总结

//

//  ViewController.m

//  沙盒操作

//

//  Created by mncong on 15/11/26.

//  Copyright © 2015年 mancong. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

//到达沙盒根路径

[self getHomePath];

//获取Document路径

[self getDocumentsPath];

//获取Library目录路径

[self getLibraryPath];

//获取Library中的Cache路径

[self getCachePath];

//获取temp路径

[self getTempPath];

//NSString类路径的处理

[self dealWithPath];

//NSData处理

[self dealWithData];

//文件管理

[self dealWithNSaFileManager];

//获取文件中文件和文件列表

[self getDirectorys];

}

- (void)getHomePath

{

NSString * homePath = NSHomeDirectory();

NSLog(@"app_home: %@",homePath);

}

- (NSString *)getDocumentsPath

{

NSArray * pathsArr = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSLog(@"%@",pathsArr);

NSString * documentsPath = [pathsArr lastObject];

NSLog(@"app_documentsPath: %@",documentsPath);

return documentsPath;

}

- (void)getLibraryPath

{

NSArray * pathsArr = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);

NSString * documentsPath = [pathsArr lastObject];

NSLog(@"app_documentsPath: %@",documentsPath);

}

- (void)getCachePath

{

NSArray * pathsArr = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);

NSString * cachePath = [pathsArr lastObject];

NSLog(@"cachePath: %@",cachePath);

}

- (void)getTempPath

{

NSString * tempPath = NSTemporaryDirectory();

NSLog(@"app_tempPath: %@",tempPath);

}

- (void)dealWithPath

{

//操作的路径

NSString * path = @"/Users/apple/testfile.text";

//获取此路径的各个组成部分

NSArray * arr = [path pathComponents];

NSLog(@"%@",arr);

//提取此路径的最后一个组成部分

NSString * lastComponent = [path lastPathComponent];

NSLog(@"%@",lastComponent);

//删除路径的最后一个组成部分

NSString * deleteLastComponent = [path stringByDeletingLastPathComponent];

NSLog(@"%@",deleteLastComponent);

//将path添加到先邮路径的末尾

NSString * addPathToPath = [path stringByAppendingPathComponent:path];

NSLog(@"%@",addPathToPath);

//去除路径最后部分的扩展名

NSString * extension = [path pathExtension];

NSLog(@"%@",extension);

//删除路径最后部分的扩展名

NSString * deletePathExtension = [path stringByDeletingPathExtension];

NSLog(@"%@",deletePathExtension);

//路径最后部分追加扩展名(注意：方法已经拼接了一个点号了，不要再加了)

NSString * appendExtension = [path stringByAppendingPathExtension:@"jpg"];

NSLog(@"%@",appendExtension);

}

- (void)dealWithData

{

//1.NSString与NSData转换

NSString * string1 = @"1234abcd";

NSData * data1 = [string1 dataUsingEncoding:NSUTF8StringEncoding];

NSLog(@"data1: %@",data1);

NSString * string2 = [[NSString alloc] initWithData:data1 encoding:NSUTF8StringEncoding];

NSLog(@"string2: %@",string2);

//2.NSData与UIImage

//拼接在本工程下的路径

NSString * path = [[NSBundle mainBundle] bundlePath];

NSString * name = [NSString stringWithFormat:@"1.jpg"];

NSString * finalPath = [path stringByAppendingPathComponent:name];

//把路径改为NSData类型

NSData * imageData = [NSData dataWithContentsOfFile:finalPath];

//获取图片

UIImage * image = [UIImage imageWithData:imageData];

//显示在UIimageView上

UIImageView * imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 200)];

imageView.image = image;

[self.view addSubview:imageView];

}

- (void)dealWithNSaFileManager

{

NSError * error;

//创建文件管理

NSFileManager * fileManager = [NSFileManager defaultManager];

//指向文档目录

NSString * documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

NSLog(@"documentsDirectory: %@",documentsDirectory);

//创建一个目录

#warning format之后什么意思 以及后面的参数

[[NSFileManager defaultManager] createDirectoryAtPath:[NSString stringWithFormat:@"%@/myFolder",NSHomeDirectory()] withIntermediateDirectories:YES attributes:nil error:&error];

//1.创建一个文件

NSString * filePath = [documentsDirectory stringByAppendingPathComponent:@"file1.txt"];

NSLog(@"filePath: %@",filePath);

NSString * str = @"需要写入的字符串";

//写入文件

[str writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:&error];

//显示文件目录的内容

NSLog(@"documentsDirectory: %@",[fileManager contentsOfDirectoryAtPath:documentsDirectory error:&error]);

//2.对一个文件重命名

NSString * filePath2 = [documentsDirectory stringByAppendingPathComponent:@"file2.text"];

NSLog(@"%@",filePath2);

if ([fileManager moveItemAtPath:filePath toPath:filePath2 error:&error] != YES)

NSLog(@"Unable to mnove file: %@",error.localizedDescription);

NSLog(@"DocumentsDirectory: %@",[fileManager contentsOfDirectoryAtPath:documentsDirectory error:&error]);

//3.删除一个文件

if ([fileManager removeItemAtPath:filePath2 error:&error] != YES)

NSLog(@"Unable to delete file:%@",error.localizedDescription);

NSLog(@"Documentsdirectory: %@",[fileManager contentsOfDirectoryAtPath:documentsDirectory error:&error]);

}

- (void)getDirectorys

{

NSFileManager * fileManager = [NSFileManager defaultManager];

NSArray * documentsPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString * documentsDirectory = [documentsPaths objectAtIndex:0];

NSError * error = nil;

NSArray * fileList = [NSArray array];

fileList = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:&error];

NSLog(@"fileList: %@",fileList);

//列出给定一个文件夹里的所有子文件夹名

NSMutableArray * dirArray = [NSMutableArray array];

BOOL isDir = NO;

for (NSString * file in fileList) {

NSString * path = [documentsDirectory stringByAppendingPathComponent:file];

[fileManager fileExistsAtPath:path isDirectory:(&isDir)];

if (isDir) {

[dirArray addObject:file];

}

isDir = NO;

}

NSLog(@"Every Thing in the Dir: %@",fileList);

NSLog(@"All folders: %@",dirArray);

}

@end