ios - UIAlertController's Action event response a bit slow?

Directly paste the click event of the Button: {code...} The pop of the navigationController feels very slow. After clicking, it feels like there is a 2-second delay before returning to the upper interface. WeChat gives up changing the payment password, and the interface returns immediately after cli...

ringa_lee 2017-05-17 10:04:26 0  1  862

The start and end points of the image

I'm trying to set the start and end points of an image. So I have my canvas and an image and when I put the image into the canvas I want it to light up a little red circle when I hover over the start/end points which means I can create with other images connect. For example: 1) Drag the image. 2) Pl...

P粉511757848 2023-08-31 12:24:51 0  1  545

Can I use @ViewChild to set focus on a specific text area?

I have a frontend angular app and I want to set focus to a specific textarea, have the cursor flash and be ready for the user to type in the textarea when it loads. After doing some googling I thought @ViewChild might be the right choice. But so far I've been able to get it working. This is my entir...

P粉477369269 2023-09-08 16:58:05 0  2  501

javascript - Solve the problem of knowing the coordinates of three points, the distance ratio to the three points, and finding the coordinates of an unknown point

Please teach me a mathematical algorithm. The coordinates of three known points p1 (x0, y0), p2 (x1, y1) p3 (x2, y2). The ratio of the unknown point M (x, y) to the three points d1, d2, d3, Find the coordinates of the unknown point Notes: 1. M may not be in the triangle formed by p1, p2, p3. Is ther...

PHP中文网 2017-07-01 09:11:54 0  4  786

javascript - On the mobile side, click to pop up the mask layer. Just add a breakpoint for debugging, but it won't work without adding a breakpoint.

{Code...} will not be executed if you click it without adding a breakpoint. I don’t know why.

PHP中文网 2017-06-10 09:48:48 0  2  863

javascript - How does the ElementUI tree control find the parent node through the child nodes?

I used the ElementUI tree control and set check-strictly to true. There is no relationship between checking the child node and checking the parent node. Now that I have selected one of the child nodes, how can I pass this child node? Find its corresponding parent node or root node?

typecho 2017-06-26 10:57:25 0  1  1949

Talk more!

Talk more!

五花小鱼 2021-04-03 21:07:47 0  1  1009

Can't be triggered by clicking

Why is there a click event in the administrator list? This click event is not triggered. After pressing F12 on the page and clicking the link on the console, he can jump to that page and reopen a browser page.

@ 2019-01-30 15:10:53 0  3  1338

javascript - Clicking a button on an iPhone requires two clicks before it takes effect

I wrote a website myself. Clicking the button once on an Android phone takes effect, but it takes two clicks on an iPhone. Why is this? How to solve it? Thanks

淡淡烟草味 2017-05-19 10:11:29 0  2  651

javascript - How to use nextElementSibling to find the next node in js

{Code...} 1. Use nextElementSibling to find the next node with the id of dialogArea and modify its value. 2. Only use native js without jquery. 3. The purpose is to use the hidden input as the positioning coordinates to search downwards when the ID and class of the input cannot be obtained under som...

天蓬老师 2017-05-19 10:12:12 0  3  642

javascript - Off and mask click!

Add a click event to the mask on the left. After clicking, the area on the right will be closed. However, the event is added to the mask, so if you click on the area on the right, it will be closed. The effect I want is to only click on the black and transparent area on the left. , I have used event...

过去多啦不再A梦 2017-05-19 10:22:09 0  1  614

It's a bit complicated to understand

It's a bit complicated to understand

我来也 2019-10-18 14:30:58 0  1  1366

javascript - If the parent nodes of the nodes to be operated on by appendchild and removechild are both body, then there is no need to obtain the body parent node in advance. or

If the parent nodes of appendchild and removechild are both body, there is no need to obtain the body parent node in advance. Or if the parent node is not the body, it is necessary to obtain the parent node in advance before using it?

为情所困 2017-06-14 10:51:27 0  5  958

Scatterplot points do not maintain values ​​when zooming in d3.js

This is my first time using d3.js, so please bear with me. I implemented it as pure JavaScript in vue.js file. I'm trying to make a scatter plot with zoom functionality. So far I have almost everything working fine, but when I zoom I notice that the x-axis is not scaling correctly, but the y-axis is...

P粉294954447 2024-04-06 18:16:26 0  1  559

Learning experiences and unique insights into the site

As a student who has been following it for more than two years, I have indeed learned a lot from it, especially the toolkit above which is very convenient. When you first start learning PHP, you should build a LAMP or WAMP environment. Although there are many integrated environments on the Internet ...

骑着小毛驴逛世界 2020-06-03 18:09:20 0  0  945

How to listen for specific click events but suppress others?

My web application contains an HTML table where each row links to a specific URL: <table><trdata-url="https://www.google.com"><td>Google</td>< /tr><trdata-url="https://www.yahoo.com"><td

P粉199248808 2024-04-04 16:55:27 0  1  408

javascript - HTML <input type="file"> cannot pop up file selector when clicked

The code is as follows: {Code...} The simplest and most basic HTML code. When running on the company computer, after clicking to select a file, the button will be clicked, but the file selector will not be called out. There should be nothing special about the company computer except that it is not c...

仅有的幸福 2017-06-05 11:09:11 0  3  794

Is 500 a floating point type?

document.write(parseInt("500eps")+"<br/>"); The output of this line after extracting the floating point type is "500". Shouldn't it be non? (Integers are integers and decimals are floating point. Is there any problem with this understanding?)

益伦 2017-09-02 18:44:19 0  3  1488

Site home page

When phpcms runs to the last step and returns to the "site home page", why does "The requested URL /install/install.php was not found on this server." appear?

帕克 2018-12-28 23:07:45 0  3  1344