NSFileWrapper removeFileWrapper
- (void)removeFileWrapper:(NSFileWrapper *)child
Parameters of [NSFileWrapper removeFileWrapper]
child
File wrapper to remove from the directory.
Special Considerations
This method raises NSInternalInconsistencyException if the receiver is not a directory file wrapper.
NSFileWrapper removeFileWrapper example.
NSFileWrapper *oldFileWrapper = [self.fileWrapper.fileWrappers objectForKey:fileName];
if (oldFileWrapper) [self.fileWrapper removeFileWrapper:oldFileWrapper];
[self.fileWrapper addRegularFileWithContents:[self encodeObject:object]
preferredFilename:fileName];
if (oldFileWrapper) [self.fileWrapper removeFileWrapper:oldFileWrapper];
[self.fileWrapper addRegularFileWithContents:[self encodeObject:object]
preferredFilename:fileName];
Example of [NSFileWrapper removeFileWrapper].
- (NSFileWrapper*) fileWrapperOfType:(NSString *)typeName error:(NSError *__autoreleasing *)outError {
return self.documentFileWrapper;
}
- (BOOL) readFromFileWrapper:(NSFileWrapper *)fileWrapper ofType:(NSString *)typeName error:(NSError *__autoreleasing *)outError {
self.documentFileWrapper = fileWrapper;
return YES;
}
- (void) addFileToDocumentFromURL:(NSURL*)fileURL {
NSData* fileData = [NSData dataWithContentsOfURL:fileURL];
NSFileWrapper *fileWrapper = [[NSFileWrapper alloc] initRegularFileWithContents:fileData];
fileWrapper.preferredFilename = [fileURL lastPathComponent];
[self.documentFileWrapper addFileWrapper:fileWrapper];
[self updateChangeCount:NSChangeDone];
}
- (void) removeFileFromDocumentWithName:(NSString*)name {
NSFileWrapper *fileWrapper = [self.documentFileWrapper.fileWrappers objectForKey:name];
if (fileWrapper) {
[self.documentFileWrapper removeFileWrapper:fileWrapper];
[self updateChangeCount:NSChangeDone];
}
}
- (NSFileWrapper*) documentFileWrapper {
if (!_documentFileWrapper) { // New document
_documentFileWrapper = [[NSFileWrapper alloc] initDirectoryWithFileWrappers:nil];
}
return _documentFileWrapper;
}
return self.documentFileWrapper;
}
- (BOOL) readFromFileWrapper:(NSFileWrapper *)fileWrapper ofType:(NSString *)typeName error:(NSError *__autoreleasing *)outError {
self.documentFileWrapper = fileWrapper;
return YES;
}
- (void) addFileToDocumentFromURL:(NSURL*)fileURL {
NSData* fileData = [NSData dataWithContentsOfURL:fileURL];
NSFileWrapper *fileWrapper = [[NSFileWrapper alloc] initRegularFileWithContents:fileData];
fileWrapper.preferredFilename = [fileURL lastPathComponent];
[self.documentFileWrapper addFileWrapper:fileWrapper];
[self updateChangeCount:NSChangeDone];
}
- (void) removeFileFromDocumentWithName:(NSString*)name {
NSFileWrapper *fileWrapper = [self.documentFileWrapper.fileWrappers objectForKey:name];
if (fileWrapper) {
[self.documentFileWrapper removeFileWrapper:fileWrapper];
[self updateChangeCount:NSChangeDone];
}
}
- (NSFileWrapper*) documentFileWrapper {
if (!_documentFileWrapper) { // New document
_documentFileWrapper = [[NSFileWrapper alloc] initDirectoryWithFileWrappers:nil];
}
return _documentFileWrapper;
}
NSFileWrapper removeFileWrapper example.
- (NSFileWrapper *)fileWrapperOfType:(NSString *)typeName
error:(NSError **)outError
{
if ([self documentFileWrapper] == nil) {
NSFileWrapper *documentFileWrapper = [[NSFileWrapper alloc] initDirectoryWithFileWrappers:nil];
[self setDocumentFileWrapper:documentFileWrapper];
}
NSDictionary *fileWrappers = [documentFileWrapper fileWrappers];
NSFileWrapper *textFileWrapper = [fileWrappers objectForKey:@"text.txt"];
NSFileWrapper *videoFileWrapper = [fileWrappers objectForKey:@"video.mp4"];
if ((textFileWrapper == nil && [self text] != nil) || [self textHasChanged]) {
if (textFileWrapper != nil)
[documentFileWrapper removeFileWrapper:textFileWrapper];
if ([self text] != nil) {
NSData *textData = [[self text] dataUsingEncoding:NSUTF8StringEncoding];
[documentFileWrapper addRegularFileWithContents:textData preferredFileName:@"text.txt"];
}
}
if ((videoFileWrapper == nil && [self videoData] != nil) || [self videoHasChanged]) {
if (videoFileWrapper != nil)
[documentFileWrapper removeFileWrapper:videoFileWrapper];
if ([self videoData] != nil)
[documentFileWrapper addRegularFileWithContents:[self videoData] preferredFileName:@"video.mp4"];
}
return documentFileWrapper;
}
error:(NSError **)outError
{
if ([self documentFileWrapper] == nil) {
NSFileWrapper *documentFileWrapper = [[NSFileWrapper alloc] initDirectoryWithFileWrappers:nil];
[self setDocumentFileWrapper:documentFileWrapper];
}
NSDictionary *fileWrappers = [documentFileWrapper fileWrappers];
NSFileWrapper *textFileWrapper = [fileWrappers objectForKey:@"text.txt"];
NSFileWrapper *videoFileWrapper = [fileWrappers objectForKey:@"video.mp4"];
if ((textFileWrapper == nil && [self text] != nil) || [self textHasChanged]) {
if (textFileWrapper != nil)
[documentFileWrapper removeFileWrapper:textFileWrapper];
if ([self text] != nil) {
NSData *textData = [[self text] dataUsingEncoding:NSUTF8StringEncoding];
[documentFileWrapper addRegularFileWithContents:textData preferredFileName:@"text.txt"];
}
}
if ((videoFileWrapper == nil && [self videoData] != nil) || [self videoHasChanged]) {
if (videoFileWrapper != nil)
[documentFileWrapper removeFileWrapper:videoFileWrapper];
if ([self videoData] != nil)
[documentFileWrapper addRegularFileWithContents:[self videoData] preferredFileName:@"video.mp4"];
}
return documentFileWrapper;
}