diff between iphone 6 and 7

(4/18) re-learn Standford_iOS7 development _ framework and course notes with attribute strings _, upgrade iOS 7 for iPhone 4 Lesson 4 (dry goods course ): (I have to review the exam recently, but it cannot keep up with the pace. The content of this lesson is still very important. Understanding it carefully will have a great impact on future programming) This course mainly involves the Foundation and UIKit f

There's no way to lose any information in a theoretical upgrade, but we recommend backing up your iphone in case of a precaution. 　1. Direct upgrade on mobile phone Apple has been pushing the OTA upgrade for iOS 7 this morning, and if you are an official version of the iOS 6 system, you can now see the update logo on the setup. Click "Settings"-"General"-"Softw

1. Close SELinux [root@ds-vm-node83 ~]# sed-i ' s/^selinux=.*/#/;s/^selinuxtype=.*/#/;/selinux=.*/a SELINUX=disabled '/etc/ Sysconfig/selinux[Root@ds-vm-node83 ~]# Setenforce 0Setenforce:selinux is disabled[Root@ds-vm-node83 ~]# 2. Install Epel source [root@ds-vm-node83 ~]# Yum Install epel-release-y[Root@ds-vm-node83 ~]# rpm--import http://mirrors.dwhd.org/EPEL/RPM-GPG-KEY-EPEL-7 3. Install Rpmforge Source [root@ds-vm-node83 ~]# Yum Install http