Inner data search in folder on iPhone APP

About a year ago, the technique seemed like God hand to me.

I found the Apple official UI tool to build the search function on the APP right after I released Catch Questions. But, the function was composed from some difficult scripts so I had not customized it at all for a long time. It took a year for me to understand some of them so that I finally created the search engine to find the inner data of folder.

The search box is located at the top of Catch and Question pages. You have to type at least 2 letters as the key word to search something. Originally, 1 letter was available while the processing speed was very low so I forbid the 1 letter search.