iOS ViewController的生命周期

#import "ViewController.h" @interface ViewController ()@property (nonatomic, strong) NSArray *array;@end @implementation ViewController  /** *  view加载完毕调用 */- (void)viewDidLoad{    [super viewDidLoad];} /** *  view即将显示到window上调用 */- (void)viewWillAppear:(BOOL)animated{    [super viewWillAppear:animated];} /** *  view显示完毕调用(已经显示到窗口上) */- (void)viewDidAppear:(BOOL)animated{    [super viewDidAppear:animated];} /** *  view即将从window上移除(即将看不见) */- (void)viewWillDisappear:(BOOL)animated{    [super viewWillDisappear:animated];} /** *  view从window上完全移除(完全看不见) */- (void)viewDidDisappear:(BOOL)animated{    [super viewDidDisappear:animated];} /** *  view即将销毁的时候调用 */- (void)viewWillUnload{    [super viewWillUnload];} /** *  view销毁完毕的时候调用 */- (void)viewDidUnload{    [super viewDidUnload];         // 移除数据    self.array = nil;} /** *  当接收到内存警告的时候 */- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning]; } @end

执行顺序就是上面代码的顺序，从上往下

loadView –> viewDidLoad –> viewWillAppear –> viewDidAppear –> viewWillDisappear –> viewDidDisappear –> viewWillUnload –> viewDidUnload