iOS ViewController的生命週期

摘要： #import "ViewController.h" @interface ViewController () @property (nonatomic, strong) NSArray *array; @end @implementation ViewContro...

#import "ViewController.h"
 
@interface ViewController ()
@property (nonatomic, strong) NSArray *array;
@end
 
@implementation ViewController
 
 
/**
 *view載入完畢呼叫
 */
- (void)viewDidLoad
{
[super viewDidLoad];
}
 
/**
 *view即將顯示到window上呼叫
 */
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
}
 
/**
 *view顯示完畢呼叫(已經顯示到視窗上)
 */
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
 
/**
 *view即將從window上移除(即將看不見)
 */
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
 
/**
 *view從window上完全移除(完全看不見)
 */
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
 
/**
 *view即將銷燬的時候呼叫
 */
- (void)viewWillUnload
{
[super viewWillUnload];
}
 
/**
 *view銷燬完畢的時候呼叫
 */
- (void)viewDidUnload
{
[super viewDidUnload];

// 移除資料
self.array = nil;

}
 
/**
 *當接收到記憶體警告的時候
 */
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
 
}
 
@end

執行順序就是上面程式碼的順序，從上往下

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