保存文件到应用程序沙盒NSDocumentDirectory中

@interface LKSaveAnimationFile : NSObject
//返回缓存根目录 "caches"
+(NSString *)getCachesDirectory;

//返回根目录路径 "document"

• (NSString *)getDocumentPath;

//创建文件夹
+(BOOL)creatDir:(NSString*)dirPath;

//删除文件夹
+(BOOL)deleteDir:(NSString*)dirPath;

//移动文件夹
+(BOOL)moveDir:(NSString)srcPath to:(NSString)desPath;

//创建文件

• (BOOL)creatFile:(NSString)filePath withData:(NSData)data;

//读取文件
+(NSData*)readFile:(NSString *)filePath;

//删除文件
+(BOOL)deleteFile:(NSString *)filePath;

//返回 文件全路径

• (NSString)getFilePath:(NSString) fileName;

//在对应文件保存数据

• (BOOL)writeDataToFile:(NSString)fileName data:(NSData)data;

//从对应的文件读取数据

• (NSData)readDataFromFile:(NSString)fileName;

@end

@implementation LKSaveAnimationFile

• (instancetype)shareInstance {
  static LKSaveAnimationFile *shareInstance = nil;
  static dispatch_once_t onceToken;
  dispatch_once(&onceToken, ^{
  shareInstance = [[self alloc] init];
  });

  return shareInstance;
  }
  //返回缓存根目录 "caches"
  +(NSString *)getCachesDirectory
  {
  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
  NSString *caches = [paths firstObject];
  return caches;
  }

//返回根目录路径 "document"

• (NSString *)getDocumentPath
  {
  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
  NSString *documentPath = [paths firstObject];
  return documentPath;
  }

//创建文件目录
+(BOOL)creatDir:(NSString*)dirPath
{
if ([[NSFileManager defaultManager] fileExistsAtPath:dirPath])//判断dirPath路径文件夹是否已存在，此处dirPath为需要新建的文件夹的绝对路径
{
return NO;
}
else
{
[[NSFileManager defaultManager] createDirectoryAtPath:dirPath withIntermediateDirectories:YES attributes:nil error:nil];//创建文件夹
return YES;
}

}

//删除文件目录
+(BOOL)deleteDir:(NSString*)dirPath
{
if([[NSFileManager defaultManager] fileExistsAtPath:dirPath])//如果存在临时文件的配置文件

{
    NSError *error=nil;
     return [[NSFileManager defaultManager]  removeItemAtPath:dirPath error:&error];
    
}

return  NO;

}

//移动文件夹
+(BOOL)moveDir:(NSString)srcPath to:(NSString)desPath;
{
NSError *error=nil;
if([[NSFileManager defaultManager] moveItemAtPath:srcPath toPath:desPath error:&error]!=YES)// prePath 为原路径、 cenPath 为目标路径
{
NSLog(@"移动文件失败");
return NO;
}
else
{
NSLog(@"移动文件成功");
return YES;
}
}

//创建文件

• (BOOL)creatFile:(NSString)filePath withData:(NSData)data
  {

  return [[NSFileManager defaultManager] createFileAtPath:filePath contents:data attributes:nil];
  }

//读取文件
+(NSData*)readFile:(NSString *)filePath
{
return [NSData dataWithContentsOfFile:filePath options:0 error:NULL];
}

//删除文件
+(BOOL)deleteFile:(NSString *)filePath
{

return [self deleteDir:filePath];

}

• (NSString *)getFilePath:(NSString *)fileName
  {
  NSString *dirPath = [[self getDocumentPath] stringByAppendingPathComponent:fileName];
  return dirPath;
  }

• (BOOL)writeDataToFile:(NSString)fileName data:(NSData)data
  {
  NSString *filePath=[self getFilePath:fileName];
  return [self creatFile:filePath withData:data];
  }

• (NSData)readDataFromFile:(NSString)fileName
  {
  NSString *filePath=[self getFilePath:fileName];
  return [self readFile:filePath];
  }
  @end