Ios-app optimization

1, optimize the TableView, correct identity reuse identity, do cell reuse, cache line high, reduce the number of subviews, use the right data structure to store data.

2, reuse and lazy loading views,view, not create all subviews at once, but wait until needed to create.

3, do not block the main thread, the main thread is mainly used to update the UI interface, the main thread blocking will cause the app to stutter.

4, caches, especially those that are unlikely to change but need to be read frequently, are taller than slices and tableview.

5, reuse large overhead objects, such as NSDateFormatter and Nscalendar. By static variables and this adds attributes to the class, similar to the simple interest object.

6, choose the correct data format, JSON or Xml,json smaller, transfer faster.

7, choose the right data storage format, such as storage of large amounts of data, Plist,nsuserdefault, nscoding are not appropriate, you can choose Core Data or SQLite

8, speed up the startup speed, as much as possible to do asynchronous tasks, such as loading server data, parsing data.

9, choose whether to cache pictures, picture loading two ways: imagenamed is suitable for repeated reuse, because when loading the picture will be cached; imagewithcontentoffile just loads the image.

10, correctly set the background picture, use full-frame background map when applicable to Uiimageview, use small tiling to do the background using Uicolor coloewithpatternimage.

Ios-app optimization