IOS文件操作

快来打我* 2023-10-18 11:23 49阅读 0赞

1.从cache文件夹拷贝到document文件夹

NSString *sqlFile = @"test.zip";
        NSArray *cachePath= NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
        NSString *cacheDir = [cachePath objectAtIndex:0];
        NSString *databasePath = [cacheDir stringByAppendingPathComponent:sqlFile];
        NSLog(databasePath);
        
        NSFileManager *fileManager = [NSFileManager defaultManager];
        // Copy the database sql file from the resourcepath to the documentpath
        if ([fileManager fileExistsAtPath:databasePath])
        {
            //NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:sqlFile];
            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
            NSString *documentpath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
            NSString* databasePathFromApp = [documentpath stringByAppendingString:@"/test.zip"] ;
            NSLog(databasePathFromApp);
            NSError *error;
            [fileManager copyItemAtPath:databasePath toPath:databasePathFromApp error:&error];
            //        if (error != nil) {
            //            NSLog(@"[Database:Error] %@", error);
            //        }
        }

2.从document文件夹拷贝到cache文件夹

NSString *sqlFile = @"qxd.db";  
        NSArray *cachePath= NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);  
        NSString *cacheDir = [cachePath objectAtIndex:0];  
        NSString *databasePath = [cacheDir stringByAppendingPathComponent:sqlFile];  
          
          
        NSFileManager *fileManager = [NSFileManager defaultManager];  
        // Copy the database sql file from the resourcepath to the documentpath  
        if (![fileManager fileExistsAtPath:databasePath]) {  
            NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:sqlFile];  
            NSError *error;  
            [fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:&error];  
    //        if (error != nil) {  
    //            NSLog(@"[Database:Error] %@", error);  
    //        }  
        }