The URL should look like the following if using a .stream file to initiate the connection to the camera.
You will notice the transcoder encode rendition name "_360p" is appended to the end of the stream name and the mp4: file type designation is not needed with a Live Stream.
In the Wowza Streaming Engine Manager, under the Selected Application / Transcoder section, you may want to check your "Fallback Template" settings. It could be set to none, in which case unless the stream name matches a template name (if checked), transcoding would be skipped. This section should also show as Status Enabled.
If the transcoder is enabled and actively transcoding your stream, you should see it under the Selected Application / Incoming Streams section. Here you can click on the stream rendition name and if you use the "Test Players..." it should auto-load the settings for the rendition into the player. Clicking the "Mobile" tab will give you the iOS URL syntax.