IOS7,IOS8,IOS9 Fitting

1.IOS8 New framework:

1.HealthKit

2.HomeKit

3.CloudKit

4.WebKit

2.Size Classes: Classify the screen (in conjunction with AutoLayout)

3.UIAlertController: Instead of Uialertview and Uiactionsheet

The 4.APP Extensions is a new iOS8 extension mechanism for several fixed system regions, which can make up for the restriction of iOS's sandbox mechanism to the communication between applications to some extent.

5. Support the third party input method

6.IOS8 Notice Changes: You can read this article: http://blog.csdn.net/songhongri/article/details/39482067

7.iphone6, IPhone6 plus iOS8, iPhone6 4.7-inch, IPhone6-plus 5.5-inch, most applications use frame for layout before iOS8, if IOS8 uses a frame for layout, in IPhone6 , IPhone6 Plus can not be fitted, preferably to AutoLayout layout

IOS9 Fit:

1. Reference: HTTP://WWW.JIANSHU.COM/P/4DD5773270F4

2. Reference: http://www.csdn.net/article/2015-09-11/2825675

3. Reference: Https://github.com/ChenYilong/iOS9AdaptationTips