The principle of installing IPA without jailbreaking (requires Apple computer): The principle of installing IPA without jailbreaking is to use iResign to re-sign the packaged and signed IPA with your own developer account, and then develop it through your own The author's signature and Provision are required to install it into the mobile phone. To put it bluntly, it is to trick the device into thinking that the application was developed by you, so of course it can be installed on the machine for debugging. . That is, it is running. Steps: 1. Log in to the developer website, download Xcode 2. Open Key Chain (keychain access) on this machine, then check the settings in the options, and then request the certificate. Fill in the name of your registered developer, the same as the email address, and then save it to the desktop. 3. Find the certificate on the left side of the Provision setting in the developer portal, and then upload the certificate request file stored on the desktop. After uploading, the system will automatically activate (If you are a developer administrator) Then download it and double-click to install it. After installation, you will see your developer certificate inside. The certificate is imported. 4. Then find the device item in the developer portal and add a new device. The UUID of your iPhone can be viewed in itunes. After adding it, your mobile phone can be used for development. 5. Create an APP ID. Here we hope that this APP ID will be used for all applications. The Provision generated through it can handle various IPA signatures. Therefore, as shown in the figure, the application name can be chosen casually, but the Bundle Identifier must be represented by *. After adding it, the system will randomly generate a number to represent your APP. It seems that something similar to the picture will represent it.

6. For our mobile phones...

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