Call native code from iOS Unity generation error

I created NativeCallProxy.cs in Unity

    public class NativeCallProxy: MonoBehaviour
        public static extern void iOSUnloadUnityGame();

        public static void UnloadUnityGame()
            // Now we check that it's actually an iOS device/simulator, not the Unity Player. You only get plugins on the actual device or iOS Simulator.
            if (Application.platform == RuntimePlatform.IPhonePlayer)

and created two files in Assets / Plugin / iOS

#import "NativeCallProxy.h"

@implementation UnityBridgeAPI
id api = NULL;
+ (void) registerAPIForNativeCalls:(id)proxy {
    api = proxy;

and NativeCallProxy.h

#ifndef NativeCallProxy_h
#define NativeCallProxy_h

@protocol UnityBridgeNativeCallsProtocol
- (void)unloadUnityGame;

@interface UnityBridgeAPI: NSObject
+ (void) registerAPIForNativeCalls:(id)proxy;

#endif /* NativeCallProxy_h */

and when I try to compile an exported project, I get an error in Xcode.

enter description of image here

How can I understand it?

macos – How to delete old backup files from iOS device (mobile backup) on Catalina

Before migrating to Catalina, if I have old backups, I can delete them via the Preferences window of the iTunes application. Now it's gone.

They still reside ~/Library/Application Support/MoibleSync and eat a huge space (200 GB + for my case, because I have multiple devices).

Where does the user interface allow me to delete them on Catalina?

magento2.3 – How do I create a custom installation instruction prompt for IOS devices?

css src in xml

.pwa-install-prompt__container {
align-items: center;
sizing of the box: border-box;
display: flex;
height: 100%;
justify-content: center;
left: -999em;
padding: 30px;
position: fixed;
above: -999em;
transition: left 0s 0.15s, top 0s 0.15s, visibility 0s 0.15s;
visibility: hidden;
width: 100%;
index z: 100,000;
} {
left: 0;
top: 0;
transition: none;
visibility: visible;

.pwa-install-prompt__overlay {
background: rgba (0,0,0,0,5);
border: 0;
height: 100%;
left: 0;
opacity: 0;
position: absolute;
text withdrawal: -999em;
top: 0;
transition: opacity 0.15 s;
width: 100%;
index z: 0;
} .pwa-install-prompt__overlay {
opacity: 1;

.pwa-install-prompt {
background: #FFF;
border radius: 2px;
shadow-box: 0px 4px 8px rgba (0,0,0,0,125);
sizing of the box: border-box;
color: # 424242;
font family: sans-serif;
max width: 320px;
opacity: 0;
position: relative;
text alignment: center;
transform: translateY (25%);
transition: opacity 0.15 s, transformation 0.15 s with ease;
index z: 1;
} .pwa-install-prompt {
opacity: 1;
transform: translateY (0%);

.pwa-install-prompt :: before {
background: url ("data: image / svg + xml,% 3Csvg viewBox = & # 39; 0 0 128 128 & # 39; xmlns = & # 39; http: //' % 3E% 3Cpath fill = & # 39;% 23FFFFFF & # 39; d = & # 39; M64.197,50.47C79.696,34.95 95.259,19.502 110.597,3.824C114.411,0.182 114.565,1.022 117.707,1.24C124 .299.2.167 127.723,10.687 123.435,16.078C108.453,32.47 92.997,48.399 77.387, 64.174C92.571,80.01 107.685,95.917 120.432.132.527 79.408. 93,611 63,979.77.65C48,485.93,169 32,917,108,618 17,584,112,147,712, 112.042C19,728.95.65 35,179.79.716 50,795.63.945C35,605.48.11 20,491,32,198 5,157,16,525C0,085,10,976 2,912,0.586 12,267 , 1.24C14.069,1.491 15.723,2.227 17.141,3.404C33.184, 18.717 48.768,34.509 64.197,50.47Z & # 39; /% 3E% 3C / svg% 3E% 0A ") center center without repetition;
border: 0;
bottom: 100%;
content: "";
display block;
height: 16px;
margin: 0 0 16px;
pointer events: none;
position: absolute;
right: 0;
width: 16px;

.pwa-install-prompt__icon__container {
background: url ("data: image / svg + xml,% 3Csvg viewBox = & # 39; 0 0 70 70 & # 39; xmlns = & # 39; http: //' % 3E% 3Cpath fill = & # 39;% 23F0F0F0 & # 39; d = & # 39; M65,17C65,10.377 59.623,5 53,5L17,5C10.377,5 5,10.377 5,17L5,53C5,59.623 10.377 , 65 17,65L53,65C59,623,65 65,59,623 65,53L65,17Z & # 39; /% 3E% 3C / svg% 3E% 0A ") center center / 70px 70px repeat-x;
margin: 40px 0 0;

.pwa-install-prompt__icon {
border radius: 12px;
display block;
margin: 0 auto;
width: 60px;

.pwa-install-prompt__content {
padding: 10px 35px;

.pwa-install-prompt__title {
font size: 24px;
margin: 0 0 20px;

.pwa-install-prompt__text {
font size: 16px;
line height: 20 px;
margin: 0 0 46px;

.pwa-install-prompt__guide {
align-items: center;
display: flex;
font size: 12px;
justify-content: center;
margin: 0;

.pwa-install-prompt__guide__icon {
margin: 0 2px 6px;
width: 20 px;

iOS – iPhone Internet sharing won't stay on

I activate Internet sharing in the control center in iOS 13 on iPhone 8 and I connect to it using WiFi. A few minutes later, my computer complains about the lack of Internet connection, so I come back to the control center to check the Internet sharing: it is now deactivated. This behavior is repeated approximately every ten minutes if I persist.

I do not understand. What is the point of Internet sharing if it doesn't stay on? Am i using it the wrong way?

Imperative smooth scrolling in iOS web browsers

I recently wanted to use scroll-behavior: smooth CSS rule or any other form of it (scrollTo with behavior: smooth) in a web application on iOS but this scrolling option is apparently not exposed by the platform, so in fact neither in any of the browsers like Safari or Chrome.

Why is this option not allowed? Is there a philosophy behind this decision? Or is it already possible to implement this functionality on the roadmap (I did not find it)? I found that smooth scrolling as an option is implemented in the web kit, but I found no information on the reasons why Apple does not allow you to use it .

Why invest in the development of iOS applications?

In an increasingly digital-driven world, application development is now an integral part of everyone's life. From small businesses to large conglomerates, application development can benefit everyone involved. It has become a robust industry which should become even more important in the coming years, with wider access to mobile phones. There has never been a better time to invest in this booming industry.

According to statistics, the phenomenon of Internet use on desktop computers is fading while at the same time, the use of mobile Internet is experiencing a steady increase. And this trend will only get stronger, as the younger generation prefers to get their dose of news, entertainment and everything else from mobile phones.

With nearly 85% of the user base being Android users, it can be difficult to look behind iOS users, but that's exactly why you shouldn't be!

IOS application development is more of a niche industry, but one that can offer many opportunities if you play your cards right. As one of the most successful companies in the world, Apple has become a fan favorite with a cult following. More than 1.5 billion Apple phones have been sold since their arrival on the market. Although Apple only sells 18% of smartphones worldwide, they make 86% of the profits.

No matter how you see it, iOS app development is a largely successful endeavor that has even greater potential. As an entrepreneur in the tech industry, consider contacting a reputable iOS app developer today and be part of that success.

iOS App Development Solutions.jpg


iphone – Can I buy iOS apps on a computer and then offer them to the end user?

In my organization we have different employees who use the iPhone in their work. Sometimes they have to buy apps.

In order to make this process smoother, I would like (as an administrator here) to have an account that purchases the apps and then sends them with the "gift" feature.

I would also like to be able to do this on a computer and not on an iPhone, for the sake of convenience we sometimes have to buy quite a few apps here.

Is it possible? When I go to, it only says "This app is only available on the App Store for iPhone and iPad."

Thank you!

ios – The iPhone could not be updated. An unknown error has occurred (4013) – Is there still a way to resolve?

Today, my iPhone X got stuck in a logo-flash loop. After searching for information with Google, I tried the "voldown + volup" restart method.

The infinite logo loop has stopped but I still cannot access my iPhone. I saw a screen like this:

enter description of image here

I searched again and found that there was a way to update the software on my iPhone without erasing my data. He says I just need to use iTunes on Mac to update iOS software.

I think it's very good. So I opened my iTunes on my Mac and it really tells me that there is an update (like 13.3.1).

After clicking on some confirmation buttons, I came across this screen below.
enter description of image here

After downloading the iOS package. And everything starts to move. I saw an error like this:
enter description of image here

What can i do now? What I have a problem with is not just the data, the pictures, but I have 2 of my banking apps on the iPhone, which is super convenient to recover if I can't access them.

What is the latest version of iOS that comes with the iPhone SE?

While the iPhone SE originally shipped with iOS 9.3, you probably wouldn't find a recently manufactured product pre-installed with iOS 9.3 (or a later version of iOS 9.x).

The iPhone SE models were discontinued on March 21, 2017 (16 and 64 GB variants) and on September 12, 2018 (32 and 128 GB variants). Any of these models, which you would likely find at a dealer who still sells them, would be probably come preinstalled with iOS 10 or later (but still below iOS 13).

If iOS 9.x is what you are looking for to access exclusive iOS 9 apps, here is the list of iOS devices that cannot be upgraded after iOS 9.x. Access to one of them could serve your purpose:

  1. iPhone 4S (latest operating system: iOS 9.3.6).

  2. iPod Touch 5th generation (latest operating system: iOS 9.3.5).

  3. iPad 2 (latest operating system: iOS 9.3.6 (Wi-Fi + cellular (CDMA)), iOS 9.3.5 (Wi-Fi and Wi-Fi + cellular (GSM))).

  4. iPad 3rd generation (latest operating system: iOS 9.3.6 (Wi-Fi + cellular), iOS 9.3.5 (Wi-Fi).

  5. iPad mini (latest operating system: iOS 9.3.6 (Wi-Fi + cellular), iOS 9.3.5 (Wi-Fi).

Source: List of iOS devices

ios – Lap time data downloaded from my Apple watch does not match the lap times listed on my phone

I downloaded my health data from my Apple watch to track my lap times. But the lap times recorded in the XML file that I downloaded are systematically lower than those listed on my watch. For example, here is what I downloaded for a ride.

        date: '2020-02-04 18:54:54 -0800'
    duration: '0.5025173644224803'
durationUnit: 'min'
        type: 'HKWorkoutEventTypeLap'

but the real lap time was more like 40 seconds. Worse, the error rate is not constant, so my downloaded lap time data really has no correlation with my actual data. It's very strange because the duration, the kilocals, etc. for the entire workout are exactly correct. Can someone advise me please?