Programmer Think

Principle of magnifying glass The magnifying glass is realized by placing a small picture in a box. Both width and height are 100%. When the mouse moves in the small picture box, a moving block (shadow area) appears. On the right side of the big picture box, there is an equal scale enlarged picture content in the small picture box moving block ...

These days, when I am watching the property animation, I suddenly think of the loading animation that can be launched on my mobile phone's desktop, so I can do it. The effect is as follows: My idea is very simple, first to achieve the animation effect of a single square, then to achieve the overall linkage effect. (1) The animation effe ...

NSSetUncaughtExceptionHandler Use your own program to capture crash and save it locally Create a new class inherited from NSObject (the process of Xcode creating an empty project is omitted), named CatchCrash, and write in the h and m files: void uncaughtExceptionHandler(NSException *exception) { // Exceptional stack informa ...

Generally, I use the mobile phone for less time, more time with the computer, mobile phone light users, the computer is heavy, after work or home, the computer is basically in use, so often there will be mobile phone not at hand or charging situation, listening to the song is hi mobile phone calls or text messages will rarely be detected, when ...

For reprinting, please indicate the source: z_zhaojun's blog       Original address This blog is mainly about the application of process lifesaving. Through learning various ways of process lifesaving on the internet, I will summarize, optimize and simply encapsulate them after I understand them. The main purpose of process maintenance is t ...

Before the text begins, let's organize the data, and all the data in Firebase's real-time database is stored as Json objects. We can think of this database as a cloud managed Json tree, which, unlike the SQL database, has no tables or records. When we add data to the Json tree, it becomes a node in the existing Json structure. Although Fireba ...

objective In some customer response systems, in the face of customer needs, we may need to notify customers by mail or feedback information to customers. For example, the bank billing system needs to process the customer's checking request and send billing email. At this time, the billing data can be written into HTML documents and sent to ...

I. Submit information to appStore First step The second step The third step Finish Step 3 and remember to save The fourth step The fifth step First click SetUp of Contact Info The sixth step The seventh step Fill it out, save it, and go back to the previous page. The eighth step The ninth step The te ...

stay Last article In this article, we will implement the basic function of adding chat, but we haven't shown the new chat in the chat list yet. We will show all chats in the chat list. First, we create a new group_chat_list_body.dart file in the / lib directory. Write a stateful control GroupChatListBody in group_chat_list_body.dart, pass two ...

The function of sending short messages is indispensable for an APP that needs channel expansion. However, when I first saw this demand, I was confused, because I had not met before, out of fear of the unknown, when I was assigned to do this task, I actually refused, but there is no way to let me be a soldier, can only be tough on the scalp. Aft ...