代理 Delegeta
Delegate
自定义视图CustomView ，创建一个实例对象，开始点击时视图缩短，移动过程中随机修改颜色，结束点击时视图恢复宽度
#import "AppDelegate.h"
#import "RootViewController.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (void)dealloc
{
[_window release];
[super dealloc];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
self.window.backgroundColor = [UIColor whiteColor];
RootViewController *rootVC = [[RootViewController alloc]init];
self.window.rootViewController = rootVC;
[rootVC release];
[self.window makeKeyAndVisible];
return YES;
}
#import "RootViewController.h"
#import "TouchView.h"
@interface RootViewController () <TouchViewDelegeta>
@end
@implementation RootViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
TouchView *view1 = [[TouchView alloc]initWithFrame:CGRectMake(30, 100, 300, 300)];
view1.backgroundColor = [UIColor magentaColor];
[self.view addSubview:view1];
view1.delegeta = self;
[view1 release];
}
- (void)touchViewBeginTouched:(TouchView *)touchView
{
touchView.bounds = CGRectMake(0, 0, 150, 150);
}
- (void)touchViewMovedTouched:(TouchView *)touchView
{
touchView.backgroundColor = [UIColor colorWithRed:arc4random() % 256 / 255.0 green:arc4random() % 256 / 255.0 blue:arc4random() % 256 / 255.0 alpha:1.0];
}
- (void)touchViewEndTouch:(TouchView *)touchView
{
touchView.bounds = CGRectMake(0, 0, 300, 300);
}
#import <UIKit/UIKit.h>
@class TouchView;
@protocol TouchViewDelegeta <NSObject>
@optional
- (void)touchViewBeginTouched:(TouchView *)touchView;
- (void)touchViewMovedTouched:(TouchView *)touchView;
- (void)touchViewEndTouch:(TouchView *)touchView;
@end
@interface TouchView : UIView
@property(nonatomic,assign)id<TouchViewDelegeta> delegeta;
@end
#import "TouchView.h"
@implementation TouchView
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
if (_delegeta && [_delegeta respondsToSelector:@selector(touchViewBeginTouched:)]) {
[_delegeta touchViewBeginTouched:self];
}
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
if (_delegeta && [_delegeta respondsToSelector:@selector(touchViewMovedTouched:)]) {
[_delegeta touchViewMovedTouched:self];
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
if (_delegeta && [_delegeta respondsToSelector:@selector(touchViewEndTouch:)]) {
[_delegeta touchViewEndTouch:self];
}
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
@end
