objective-c crop image - Stack Overflow

For example, I have a picture like the one above. I want to crop out the three red areas and turn them into three new pictures, and convert them into a new UIImage object or save them to the photo album. How to handle it will be easier? (The red frame is for demonstration purposes only, the actual p...

给我你的怀抱 2017-05-31 10:32:03 0  1  729

Image upload problem

It is necessary to upload and modify personal information. After the user fills in the data, the data will be displayed the second time. Now there is a problem with the pictures. In addition to displaying multiple pictures, the user can also upload pictures again and modify the data after submission...

懒货 2020-03-24 12:17:37 0  0  1081

Why is the onclick function return false not triggered in JavaScript?

The code typed out according to the JavaScript dom programming art part about displaying pictures on web pages, there is a section that requires input onclick="showPic(this);return false;" to prevent the web page from popping up new links to view pictures, but in the end it runs A new link...

滿天的星座 2017-05-19 10:39:07 0  2  611

javascript - hexo articles cannot be deployed, what is the reason?

Type hexo new "lalala" hexo g hexo s hexo d in the command line. After that, the newly added article can be displayed on the blog. public file_posts file article adds content and submits the article hexo g hexo s hexo d. Finally, the blog effect is that the article disappears and is not up...

三叔 2017-06-12 09:32:45 0  1  1089

javascript - Regarding development using axios and vue. When the mobile browser returns, it reads the cache and cannot execute js and vue components.

A mobile website has tested login restrictions on a page. If you are not logged in, you will go to the login page, but when you reach the login page and press the return key, you can still return to the first page without reading any data or pictures. How can I make him go back? It's time to refresh...

高洛峰 2017-07-05 10:48:12 0  2  960

As shown in the picture, why is 1 also refreshed when 2 is refreshed in a background project made by PHP?

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phpcn_u1582 2017-06-06 09:54:19 0  2  675

Use the Tab key to navigate html elements on the page

I can't scroll using the tab key on an HTML page using the tab key. Here is a picture of the page I try to browse the tabs for when the "Unable to update table" popup opens. I clicked on it and pressed tab. The first time I press the tab, the focus goes to the arrow element in the picture....

P粉106301763 2024-02-03 21:30:59 0  1  453

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't wo...

P粉178132828 2023-09-05 11:18:47 0  1  792

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactNam...

P粉237125700 2023-09-05 14:46:42 0  1  709

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: ...

P粉212114661 2023-09-05 15:18:28 0  1  597

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

P粉076987386 2023-09-05 15:06:32 0  1  558

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44 0  1  988

How to get average of DATETIME column in MySQL while grouping by other columns

I'm creating and populating a MySQL table using the following query: SETtime_zone='+00:00';CREATETABLEtimestamp_n_datetime(idINT,timeDATETIME,avg_timeDATETIME);INSERTINTOtimestamp_n_datetime(id,time,avg_time)VALUES("1","2023-01-0310:

P粉460377540 2023-09-05 11:46:21 0  1  498

Multi-device (mobile phone) synchronization - React Native

I'm trying to create a Lightshow that will launch on all users' mobile devices at the same time (can have up to 2000-3000 users). All users will use the Internet (Wi-Fi or mobile data). In our FE we use Apollo for subscriptions and it works like a charm. But the problem is, user A can get subscribed...

P粉151466081 2023-09-05 11:58:38 0  1  689

Spades, Diamonds, Hearts, Clubs => styles do not change font color in Chrome for Android

In Google Chrome on Windows, the card suit symbols (spades, hearts, diamonds, clubs) are colored correctly using the "style" attribute. Unfortunately, the same page displayed in Google Chrome on Android does not display the colors I defined but uses the default black and red. (See the atta...

P粉896751037 2023-09-05 15:25:13 0  1  751

How to hide mui TextField label?

I'm developing a Nextjs app and I have a dashboard navigation bar built with mui that contains a notification that opens the notification box, which is built with regular HTML and CSS. dashboard-navbar.js: importNotificationBoxfrom"./notification-box/notification-box";//...exportconstDashb...

P粉239164234 2023-09-05 15:41:00 0  1  672

Custom Bootstrap 5 carousel on mobile (multiple items, but not in one row)

I'm having trouble trying to customize the carousel layout on mobile devices. I want it to show every item of the carousel on mobile instead of just one, but after trying with some CSS and JS, especially using displayfloat or max-witdh I'm just starting to think this isn't possible, Or I don't know ...

P粉763662390 2023-09-05 11:53:56 0  1  590

How to use Firebase Authentication with multiple login methods and role-based authentication?

I am creating a react.js application with nodejs as backend and I want to use these authentication methods to login using email/password, login using google and login using phone, now I want to keep the uniqueness of the user while signing the user's name for Any of these, I will also get other deta...

P粉574695215 2023-09-05 12:18:10 0  1  650