IOS在Document目录下创建文件夹、保存、读取、以及删除文件

    //  在Documents目录下创建一个名为LaunchImage的文件夹
    NSString *path = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"LaunchImage"];
    NSLog(@"%@",path);
    
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL isDir = FALSE;
    BOOL isDirExist = [fileManager fileExistsAtPath:path isDirectory:&isDir];
    if(!(isDirExist && isDir))
        
    {
        BOOL bCreateDir = [fileManager createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:nil];
        if(!bCreateDir){
            NSLog(@"创建文件夹失败！");
        }
        NSLog(@"创建文件夹成功，文件路径%@",path);
    }
    
    UIImage *image=[UIImage imageWithContentsOfFile:@"testimage.png"];
    NSData *data = UIImagePNGRepresentation(image);
    //将testimage.png保存到LaunchImage文件夹下，新名称为image1.png
         BOOL isSaved=   [fileManager createFileAtPath:[path stringByAppendingString:@"/image1.png"] contents:data attributes:nil];
    NSLog(@"图片保存状态：%d",isSaved);
    
    //获取保存的图片
    UIImage *newimage=[UIImage imageWithContentsOfFile:[path stringByAppendingString:@"/image1.png"]];
   
//   删除文件
     BOOL isDelete=[fileManager removeItemAtPath:path error:nil];
    NSLog(@"%d",isDelete);