Also add file deletion for iOS apps :)

internal/driver/mobile/file_android.go

@@ -141,6 +141,11 @@ func (s *javaStream) Write(p []byte) (int, error) {
 	return len(p), err
 }
 
+func deleteURI(u fyne.URI) error {
+	// TODO implement this for Android
+	return repository.ErrOperationNotSupported
+}
+
 func existsURI(uri fyne.URI) (bool, error) {
 	uriStr := C.CString(uri.String())
 	defer C.free(unsafe.Pointer(uriStr))

internal/driver/mobile/file_desktop.go

@@ -10,6 +10,11 @@ import (
 	"fyne.io/fyne/v2/storage/repository"
 )
 
+func deleteURI(u fyne.URI) error {
+	// no-op as we use the internal FileRepository
+	return nil
+}
+
 func existsURI(fyne.URI) (bool, error) {
 	// no-op as we use the internal FileRepository
 	return false, nil

internal/driver/mobile/file_ios.go

@@ -9,6 +9,7 @@ package mobile
 #import <stdlib.h>
 #import <stdbool.h>
 
+void iosDeletePath(const char* path);
 bool iosExistsPath(const char* path);
 void* iosParseUrl(const char* url);
 const void* iosReadFromURL(void* url, int* len);
@@ -97,9 +98,21 @@ func (s *secureWriteCloser) Close() error {
 	return nil
 }
 
+func deleteURI(u fyne.URI) error {
+	if u.Scheme() != "file" {
+		return errors.New("cannot delete from " + u.Scheme() + " scheme on iOS")
+	}
+
+	cStr := C.CString(u.Path())
+	defer C.free(unsafe.Pointer(cStr))
+
+	C.iosDeletePath(cStr)
+	return nil
+}
+
 func existsURI(u fyne.URI) (bool, error) {
 	if u.Scheme() != "file" {
-		return true, errors.New("cannot check existence of " + u.Scheme() + " on iOS")
+		return true, errors.New("cannot check existence of " + u.Scheme() + " scheme on iOS")
 	}
 
 	cStr := C.CString(u.Path())

internal/driver/mobile/file_ios.m

@@ -4,6 +4,11 @@
 
 #import <stdbool.h>
 
+void iosDeletePath(const char* path) {
+    NSString *pathStr = [NSString stringWithUTF8String:path];
+    [[NSFileManager defaultManager] removeItemAtPath:pathStr error:nil];
+}
+
 bool iosExistsPath(const char* path) {
     NSString *pathStr = [NSString stringWithUTF8String:path];
     return [[NSFileManager defaultManager] fileExistsAtPath:pathStr];

internal/driver/mobile/repository.go

@@ -40,8 +40,7 @@ func (m *mobileFileRepo) CreateListable(u fyne.URI) error {
 }
 
 func (m *mobileFileRepo) Delete(u fyne.URI) error {
-	// TODO: implement this
-	return repository.ErrOperationNotSupported
+	return deleteURI(u)
 }
 
 func (m *mobileFileRepo) Destroy(string) {