#import "ViewController.h" @interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; //不该该本身调用dealloc方法,运行期系统会在适当的时候调用它。 //在dealloc方法作什么: /* 1.清空全部对象 2.移除通知 3.调用dealloc方法时,对象已处于正在回收的状态了,不该该再调用其余方法。 */ } //例 -(void)dealloc{ //CFRelease(corefoundationobject) [[NSNotificationCenter defaultCenter]removeObserver:self]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end