xcode 从文档目录中删除文件类型
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Remove file types from Documents Directory
提问by Snowy
i am trying to delete all the files in the Document Directory with the extension ".jpg", after many tries, i am still not managed to succeed.
我试图删除扩展名为“.jpg”的文档目录中的所有文件，经过多次尝试，我仍然没有成功。
the code i have already now is:
我现在已经拥有的代码是：
-(void)removeOneImage:(NSString*)fileName {
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.jpg", fileName]];
[fileManager removeItemAtPath: fullPath error:NULL];
}
with this code i can remove one file with a specific name.
使用此代码，我可以删除一个具有特定名称的文件。
Can anyone help me to remove all files with a specific extension?
谁能帮我删除具有特定扩展名的所有文件？
Kind regards,
亲切的问候，
Snowy
下雪
回答by Francis McGrew
NSString *extension = @"jpg";
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSArray *contents = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:NULL];
NSEnumerator *e = [contents objectEnumerator];
NSString *filename;
while ((filename = [e nextObject])) {
if ([[filename pathExtension] isEqualToString:extension]) {
[fileManager removeItemAtPath:[documentsDirectory stringByAppendingPathComponent:filename] error:NULL];
}
}
回答by Chetan Bhalara
// Get the Documents directory path
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectoryPath = [paths objectAtIndex:0];
// Delete the file using NSFileManager
NSFileManager *fileManager = [NSFileManager defaultManager];
[fileManager removeItemAtPath:[documentsDirectoryPath stringByAppendingPathComponent:yourFile.txt] error:nil];
For More information
想要查询更多的信息
How to delete ALL FILES in a specified directory on the app?
回答by Rajesh Loganathan
very simple method:
非常简单的方法：
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *imageName = [NSString stringWithFormat:@"demo.jpg"];
[fileManager removeItemAtPath:imageName error:NULL];
回答by Shebuka
If you prefer fast enumeration:
如果您更喜欢快速枚举：
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
NSString *extension = @"jpg";
NSArray *contents = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:nil];
for (NSString *file in contents) {
NSString *filePath = [documentsDirectory stringByAppendingPathComponent:file];
if ( ([[file pathExtension] isEqualToString:extension]) && [fileManager isDeletableFileAtPath:filePath] ) {
[fileManager removeItemAtPath:filePath error:nil];
}
}
