Question

我正在尝试删除文档目录中扩展名为“.jpg”的所有文件，经过多次尝试后，我仍然无法成功。

我现在的代码是：

-(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];
}

使用此代码我可以删除一个具有特定名称的文件。

有人可以帮我删除具有特定扩展名的所有文件吗？

亲切的问候，

多雪

Answer 1

    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];
    }
}

Answer 2

// 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];

了解更多信息

How to delete ALL FILES in a specified directory on the app?

Answer 3

非常简单的方法：

NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *imageName = [NSString stringWithFormat:@"demo.jpg"];
[fileManager removeItemAtPath:imageName error:NULL];

Answer 4

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];
    }
}

从文档目录中删除文件类型

4 个答案: