IOS Advanced 11th Day (0411)

Structure of the 0411UItaBbar

Each array has a method, and that is the following, as shown in:

If you want to see how a system control is made up, you can do so by traversing its child controls, as shown in the previous illustration

In IOS7 and later systems, the Controller Viewcontroller view is the banner, from head to toe. But in iOS6 and its previous systems, the height of the controller Viewcontorller view should be removed from the covered portion. Strong and weak

Object Destruction Guidelines:

• Non-Arc: This object is automatically destroyed by the system as long as the object's reference counter is 0
• ARC: This object is automatically destroyed by the system as long as there are no strong pointers pointing to this object

The most fundamental is the system to see if the current object's reference counter is 0, except in the case of non-arc and arc not clear the description of different forms.

Some of MJ's summaries

IOS Advanced 11th Day (0411)