想操做文件,该去了解下NSFileManager数组
注意://小窍门:打印数组或者字典,里面包含中文,直接用%@打印会看不到中文,可用for遍历访问code
NSFileManager *fileManager = [NSFileManager defaultManager];
#define LogBool(value) NSLog(@"%@",value==YES?@"YES":@"NO"); NSString *filepath = @"/Users/geek/Desktop/data.plist"; BOOL res = [fileManager fileExistsAtPath:filepath]; LogBool(res)
NSString *filepath1 = @"/Users/geek/Desktop/data.plist"; BOOL isDirectory = NO; BOOL isExist = [fileManager fileExistsAtPath:filepath1 isDirectory:&isDirectory]; if (isExist) { NSLog(@"文件存在"); if (isDirectory) { NSLog(@"文件夹路径"); }else{ NSLog(@"文件路径"); } }else{ NSLog(@"给定的路径不存在"); }
//这是一个系统文件(不可读) NSString *filePath2 = @"/.DocumentRevisions-V100 "; BOOL isReadable = [fileManager isReadableFileAtPath:filePath2]; if (isReadable) { NSLog(@"文件可读取"); } else { NSLog(@"文件不可读取"); }
//系统文件不可写入 BOOL isWriteAble = [fileManager isWritableFileAtPath:filePath2]; if (isWriteAble) { NSLog(@"文件可写入"); } else { NSLog(@"文件不可写入"); }
//系统文件不可删除 BOOL isDeleteAble = [fileManager isDeletableFileAtPath:filePath2]; if (isDeleteAble) { NSLog(@"文件能够删除"); } else { NSLog(@"文件不可删除"); }
NSError *error = nil; NSDictionary *fileInfo = [fileManager attributesOfItemAtPath:filepath1 error:&error]; // NSLog(@"文件信息:%@,错误信息:%@",fileInfo,error); NSLog(@"文件大小:%@",fileInfo[NSFileSize]);
NSString *filePath3 = @"/Users/geek/desktop"; NSArray *subs = [fileManager subpathsAtPath:filePath3]; NSLog(@"Desktop目录下全部的全部文件和文件夹"); //小窍门:打印数组或者字典,里面包含中文,直接用%@打印会看不到中文,可用for遍历访问 for (NSString *item in subs) { NSLog(@"%@",item); }
NSError *erroe = nil; NSArray *children = [fileManager contentsOfDirectoryAtPath:filePath3 error:&erroe]; NSLog(@"Desktop目录下的文件和文件夹"); for (NSString *item in children) { NSLog(@"%@",item); }
NSString *filePath1 = @"/Users/geek/Desktop/data.text"; NSData *data = [@"我要学好OC" dataUsingEncoding:NSUTF8StringEncoding]; BOOL createFile = [fileManager createFileAtPath:filePath1 contents:data attributes:nil]; if (createFile) { NSLog(@"文件建立成功"); } else { NSLog(@"文件建立失败"); }
设置一路建立为NO,若是文件夹不存在则中止建立文件orm
NSString *filePath2 = @"/Users/geek/Desktop/海贼王"; NSError *error = nil; BOOL createDirectory = [fileManager createDirectoryAtPath:filePath2 withIntermediateDirectories:NO attributes:nil error:&error]; if (createDirectory) { NSLog(@"文件夹建立成功"); } else { NSLog(@"文件夹建立失败,缘由:%@",error); } //一路建立失败(文件夹不存在就不建立) NSString *filePath3 = @"/Users/geek/Desktop/海贼王"; BOOL createDirectory1 = [fileManager createDirectoryAtPath:filePath3 withIntermediateDirectories:NO attributes:nil error:&error]; if (createDirectory1) { NSLog(@"文件夹建立成功"); } else { NSLog(@"文件夹建立失败,缘由:%@",error); }
NSString *filePath4 = @"/Users/geek/Desktop/动漫"; BOOL copyRes = [fileManager copyItemAtPath:filePath3 toPath:filePath4 error:nil]; if (copyRes) { NSLog(@"文件复制成功"); } else { NSLog(@"文件复制失败"); }
NSString *filePath5 = @"/Users/geek/Downloads/动漫"; BOOL moveRes = [fileManager moveItemAtPath:filePath3 toPath:filePath5 error:nil]; if (moveRes) { NSLog(@"文件移动成功"); } else { NSLog(@"文件移动失败"); }
//能够给文件重命名 NSString *filePath6 = @"/Users/geek/Downloads/卡通"; [fileManager moveItemAtPath:filePath5 toPath:filePath6 error:nil];
BOOL deleteRes = [fileManager removeItemAtPath:filePath6 error:nil]; if (deleteRes) { NSLog(@"文件删除成功"); } else { NSLog(@"文件删除失败"); }
//单例方法获得文件管理者对象 NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *filePath = @"/Users/geek/desktop/delete/"; while (1) { //判断该文件路径是否存在 BOOL exist = [fileManager fileExistsAtPath:filePath]; if (exist) { //找出该路径下的全部文件 NSArray *subs = [fileManager contentsOfDirectoryAtPath:filePath error:nil]; if (subs.count > 0) { for (int i=0; i<subs.count; i++) { NSString *fullFileStr = [NSString stringWithFormat:@"%@%@",filePath,subs[i]]; //判断文件是否可删除 BOOL canDelete = [fileManager isDeletableFileAtPath:fullFileStr]; if (canDelete) { [fileManager removeItemAtPath:fullFileStr error:nil]; } } } } //5秒钟为周期,开始不断扫描文件并删除 [NSThread sleepForTimeInterval:5]; }