想操做文件,该去了解下NSFileManagergit
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github
NSFileManager *fileManager = [NSFileManager defaultManager];
复制代码
#define LogBool(value) NSLog(@"%@",value==YES?@"YES":@"NO");
NSString *filepath = @"/Users/geek/Desktop/data.plist";
BOOL res = [fileManager fileExistsAtPath:filepath];
LogBool(res)
复制代码
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");
}
复制代码
//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");
}
复制代码
//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");
}
复制代码
//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");
}
复制代码
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]);
复制代码
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);
}
复制代码
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);
}
复制代码
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");
}
复制代码
设置一路建立为NO,若是文件夹不存在则中止建立文件数组
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);
}
复制代码
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");
}
复制代码
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");
}
复制代码
//能够给文件重命名
NSString *filePath6 = @"/Users/geek/Downloads/卡通";
[fileManager moveItemAtPath:filePath5 toPath:filePath6 error:nil];
复制代码
BOOL deleteRes = [fileManager removeItemAtPath:filePath6 error:nil];
if (deleteRes) {
NSLog(@"文件删除成功");
} else {
NSLog(@"文件删除失败");
}
复制代码
//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];
}
复制代码