Updating this thread to add basically the same instructions from last year, but with some clarifications.
On iPhone (or iPad I guess) browser go to website https://postimages.org/
There are only 2 things to do on the initial screen:
Where it says “do not resize my image” click on the drop down and select “640x480 for message boards”
Below that it says “No expiration.” I wouldn’t bother with changing that.
Then, below that click on “Choose images” and click on the option “Photo Library”.
Select a photo and click on Add in the upper right corner.
Once the photo is uploaded to the postimage website, you will see links to pick at the bottom. You want “Direct link”, so click on the copy icon on the right side of the direct link https code.
Go to LCT:
In the New Reply section of the thread on LCT, you have to click on [Use Full Editor].
Doing that will give you icons for more options to use in the post than you would see if you just did “Quick Reply”.
The "Insert Image Link" is the 5th button under the heading "Post" (It looks like a landscape and is to the right of the smiley face).
When you click on that button, you will get a small pop-up that says "Enter the URL of the image you wish to display".
The text "http://" automatically appears in the field, but click delete it to clear it out. Then paste in the URL you got in postimages.org when you clicked on the button at the end of the "Direct Image" link.
It should create the correct code. But, if you don't see the photo in your post, click on edit in the post. It will display the code. You can check there to be sure the code has https:// only once.