Xcode ARC forbids explicit message send of ' release '

Xcode version 5.1.1

IOS SDK 7.1

IMAC OS X 10.9.2

There will be 2 error messages:

1, ' Release ' is unavailable:not available in automatic reference counting mode

2. ARC forbids explicit message send of ' release '

Program Disable call method release, because the project opened arc (automatic reference counting), that is, the automatic reference count (is a memory management technology, the object has a counter inside, the external reference increases (call retain), the counter plus 1, When the external reference disappears (call release), the counter is minus 1, the counter is 0 o'clock, and the object is actually disposed.

So if you want to actively call release, you need to turn off arc (5.1.1 Create Project automatically opens arc).

Objective-c Automatic Reference counting set to No.