九乡新闻网行书书法字帖:Ipad开发课程-Charpter4 Application Delegate类 ? 疯狂的老九
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Ipad开发课程-Charpter4 Application Delegate类
22Aug
Posted by: 9 in: Iphone程序开发
接上节：
Application Delegate
viewBasedAppAppDelegate.m文件，当你用Xcode创建一个应用程序，你的应用程序总是用AppDelegate字符串来描述，它总是用“你的程序的名字”+AppDelegate来显示。它的代码将在程序完成装载时被执行完成，然后终止。
#import “viewBasedAppAppDelegate.h”#import “viewBasedAppViewController.h”@implementation viewBasedAppAppDelegate@synthesize window;@synthesize viewController;- (BOOL)application:(UIApplication *)applicationdidFinishLaunchingWithOptions:(NSDictionary *)launchOptions {// Override point for customization after app launch[window addSubview:viewController.view];[window makeKeyAndVisible];return YES;}- (void)dealloc {[viewController release];[window release];
#import “viewBasedAppAppDelegate.h”
#import “viewBasedAppViewController.h”
@implementation viewBasedAppAppDelegate
@synthesize window;
@synthesize viewController;
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)
launchOptions {
// Override point for customization after app launch
[window addSubview:viewController.view];
[window makeKeyAndVisible];
return YES;
}
- (void)dealloc {
[viewController release];
[window release];
[super dealloc];
}
@end
当应用程序已经完成装载，它将发出一个application指令：DidFinishLaunchingWithOptions:message它被用于让窗口控制器将窗口显示出来.
viewBasedAppDelegate.h文件包含viewBasedAppDelegate所有类成员的声明:
#import
@class viewBasedAppViewController;
@interface viewBasedAppAppDelegate : NSObject
UIWindow *window;
viewBasedAppViewController *viewController;
}
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet viewBasedAppViewController
*viewController;
@end
详细说明一行代码:@interface viewBasedAppAppDelegate : NSObject
这个
Application:DidFinishLaunchingWithOptions:
applicationWillTerminate:
applicationDidDidReceiveMemoryWarning:
Application Delegate类用于放置一些整个程序中都会用到的对象和函数,以便程序中的其它类的调用.