append_to append_to_async append_to_finish copy copy_async copy_finish create create_async create_finish create_readwrite create_readwrite_async create_readwrite_finish delete_file delete_file_async delete_file_finish dup eject_mountable eject_mountable_finish eject_mountable_with_operation eject_mountable_with_operation_finish enumerate_children enumerate_children_async enumerate_children_finish equal find_enclosing_mount find_enclosing_mount_async find_enclosing_mount_finish get_basename get_child_for_display_name get_parent get_parse_name get_path get_relative_path get_uri get_uri_scheme has_uri_scheme hash is_native make_directory make_directory_async make_directory_finish make_symbolic_link make_symbolic_link_async make_symbolic_link_finish measure_disk_usage measure_disk_usage_async measure_disk_usage_finish monitor_dir monitor_file mount_enclosing_volume mount_enclosing_volume_finish mount_mountable mount_mountable_finish move move_async move_finish open_readwrite open_readwrite_async open_readwrite_finish poll_mountable poll_mountable_finish prefix_matches query_exists query_filesystem_info query_filesystem_info_async query_filesystem_info_finish query_info query_info_async query_info_finish query_settable_attributes query_writable_namespaces read_async read_finish read_fn replace replace_async replace_finish replace_readwrite replace_readwrite_async replace_readwrite_finish resolve_relative_path set_attribute set_attributes_async set_attributes_finish set_attributes_from_info set_display_name set_display_name_async set_display_name_finish start_mountable start_mountable_finish stop_mountable stop_mountable_finish trash trash_async trash_finish unmount_mountable unmount_mountable_finish unmount_mountable_with_operation unmount_mountable_with_operation_finish

GioFilequery_exists

gboolean
query_exists (
  GFile* file,
  GCancellable* cancellable
)

TRUE 表示文件存在（并且可以无错误检测到），FALSE 表示其他情况（或已取消）。