版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/sndongcheng/article/details/84546200
获取沙盒目录
//获取沙盒目录
- (NSString *)getHomePath{
NSString *homePath =NSHomeDirectory();
return homePath;
}
//获取Document目录
- (NSString *)getDocumentPath{
NSArray *docPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentPath = [docPaths lastObject];
return documentPath;
}
//获取library目录
- (NSString *)getLibraryPath{
NSArray *libPaths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *libraryPath = [libPaths lastObject];
return libraryPath;
}
//获取tmb目录
- (NSString *)getTmbPath{
NSString *tmpPath = NSTemporaryDirectory();
return tmpPath;
}
获取string文件目录
//获取string路径成分
- (void)parsePath{
NSString *path = @"/data/Containers/Data/Application/test.png";
NSArray *array = [path pathComponents];
//提取路径最后一个组成部分
NSString *name = [path lastPathComponent];
//删除路径最后一个组成部分
NSString *string = [path stringByDeletingLastPathComponent];
//追加路径最后一个组成部分
NSString *addstring = [path stringByAppendingPathComponent:@"name.txt"];
}
NSData和NString和image之间的相互转换
- (void)dataChange:(NSData *)data{
NSString *astring = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
NSData *aData = [astring dataUsingEncoding:NSUTF8StringEncoding];
UIImage *image = [UIImage imageWithData:aData];
NSData *data2 = UIImagePNGRepresentation(image);
}
创建文件夹
-(void)createFolder{
NSString *docPath = [self getDocumentPath];
NSString *testPath = [docPath stringByAppendingPathComponent:@"haha"];
NSFileManager *manager = [NSFileManager defaultManager];
BOOL ret = [manager createDirectoryAtPath:testPath withIntermediateDirectories:YES attributes:nil error:nil];
if (ret) {
NSLog(@"文件夹创建成功");
}else{
NSLog(@"文件夹创建失败");
}
}
创建文件
- (void)createFile{
NSString *docPath = [self getDocumentPath];
NSString *testPath = [docPath stringByAppendingPathComponent:@"抖词"];
NSString *filePath = [testPath stringByAppendingPathComponent:@"我的笔记"];
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL ret = [fileManager createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:nil];
if (ret) {
NSLog(@"创建成功");
}else{
NSLog(@"创建失败");
}
}
创建文件内容
-(void)writeFile{
NSString *docPath = [self getDocumentPath];
NSString *testPath = [docPath stringByAppendingPathComponent:@"抖词"];
NSString *filePath = [testPath stringByAppendingPathComponent:@"我的笔记"];
NSString *content = @"这是我所添加的笔记";
BOOL ret = [content writeToFile:filePath atomically:YES encoding:NSUTF8StringEncoding error:nil];
if (ret) {
NSLog(@"写入文件成功");
}else{
NSLog(@"写入文件失败");
}
}
添加文件内容
//判断文件是否存在
- (BOOL)fileExist:(NSString *)filePath{
NSFileManager *manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:filePath]) {
return YES;
}else{
return NO;
}
}
//追加内容
- (void)addFile{
NSString *docPath = [self getDocumentPath];
NSString *testPath = [docPath stringByAppendingPathComponent:@"慕课网"];
NSString *filePath = [testPath stringByAppendingPathComponent:@"我的笔记.txt"];
NSFileHandle *fileHandle = [NSFileHandle fileHandleForUpdatingAtPath:filePath];//打开文件准备更新
[fileHandle seekToEndOfFile];//将节点跳到文件末尾
NSString *string = @"这是我所添加的笔记";
NSData *stringData = [string dataUsingEncoding:NSUTF8StringEncoding];
[fileHandle writeData:stringData];
[fileHandle closeFile];//关闭文件
}
删除文件
- (void)deleteFile {
NSString *docPath = [self getDocumentsPath];
NSString *testPath = [docPath stringByAppendingPathComponent:@"抖音"];
NSString *filePath = [testPath stringByAppendingPathComponent:@"我的笔记.txt"];
NSFileManager *manager = [NSFileManager defaultManager];
BOOL ret = [self fileExist:filePath];
if (ret) {
BOOL ret2 = [manager removeItemAtPath:filePath error:nil];
if (ret2) {
NSLog(@"文件删除成功");
}else{
NSLog(@"文件删除失败");
}
}else{
return;
}
}