All my foto's are dissapear can't find them back

Question

All my photo's are gone and can't find them back anywhere. Does anybody know how i can find them back?

Answer 1

Open your library with the Finder as shown in this screenshot:
Go the the Masters folder and check inside its subfolder to see if the original files are in there.  If not then your photos are gone. If the original files are in those sub folder do the following:
Starting over from scratch with new library
Start over with a new library and import the Originals (iPhoto 09 and earlier) or the Masters (iPhoto 11) folder from your original library as follows:
1. Open the library package like this.
2. Launch iPhoto with the Option key held down and, when asked, select the option to create a new library.
3. Drag the subfolders of the Originals (iPhoto 09 and earlier) or the Masters (iPhoto 11) folder from the open iPhoto Library package into the open iPhoto window a few at a time.
This will create a new library with the same Events (but not necessarily the same Event names) as the original library but will not keep the metadata, albums, books slideshows and other projects.
Note:  your current library will be left untouched for further attempts at a fix if so desired.