Mobile phone system [ iOS and Android ]
iOS and Android: Everyone will always entangle which mobile phone system will be more suitable for you, then I will briefly introduce the difference between IOS and Android.
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iOS and Android Operating mechanism
Android is the virtual machine running mechanism, IOS is the sandbox operating mechanism. Here again, explain the main differences between the two. The operation of the application in the Android system is run in a virtual environment.
The operation mode is that the data is first transmitted to the virtual machine, and then transmitted to the user interface (referred to as UI) by the virtual machine.
The Apple IOS sandbox operation mechanism has a relatively regular separation control. Which is equivalent to putting each application in its own sandbox for file reading, each sandbox is relatively independent.
The sandbox mode allows each application to be in its own sandbox, with no mutual access and interference, and all non-code files are stored in their own folders, just a good model.
The virtual machine running mechanism is not so ideal, the programs can exchange visits, which makes the memory occupied is very large and consumes quickly. This will inevitably increase the generation of junk files. The more programs run, the faster the memory is occupied. As a result, the mobile phone will use more and more cards.
Backstage system
The background system of iOS and Android background push is different. The IOS push relies on the system resident process. All the push of Apple’s messages will be taken over by these resident processes. Between the resident process and the application.
They are independent of each other. These resident processes exchange data with Apple’s servers, which means that the applications provided on the Apple mobile phone must be communicated to the Apple server by the server provided by the manufacturer, and then transferred to the mobile phone.
It seems that this push mechanism is very clever because the existence of the resident process does not require the application to have its own process in the background to communicate with its own server, reducing system overhead and reducing memory consumption.
Android is not like this. Android needs each application to establish its own process in the background. Each application exchanges data with its own server. It does not handle most of the data processing to the cloud like IOS.
Of course, Android has also undergone transformation recently, but most of them are still like this. Android has its own advantages, that is, this operating mechanism makes the Android program run more stable.
Command authority
The UI in the IOS command has the highest authority, which gives the user interface a more free operation space.
Android has the highest authority for data processing instructions. The reason why you want to talk about command permissions is that it is related to the security of the system and mobile phones.
The most serious violation of mobile phones today is malware. Since the highest privilege of IOS is given to the UI client, the IOS that has not been jailbroken has obtained the best security.
Now Android generally has a root switch itself, because the application permissions are too high, there is a higher security risk than the non-jail IOS. However, if it is an IOS that has been jailbroken, then the danger is even greater.
The following is a brief introduction of what is jailbreak and root:
- Jailbreak refers to cracking the IOS limit to obtain the highest authority, to achieve more free control.
- Root refers to all the permissions of the system, of course, has the highest authority. Which not only ensures the security and destruction of the phone.
- The hidden danger of mobile phones exists.
The above three points are the most important differences. In addition, there are also differences in aspects of face and development difficulty.
To explain a few points, IOS is relatively safe because it is relatively closed, Android’s expansion ability is stronger. IOS development is simple but debugging is difficult, Android development is cumbersome but debugging is easy.
All in all, IOS and Android have their own advantages and disadvantages. It is very good to get used to which one.