Target—Action
题目：
⾃自定义view,实现点击事件。
不同的实例,点击效果不同:点击视图改变颜色、点击视图改变位置,点击视图修改⼤⼩。
#import "AppDelegate.h"
#import "TargetActionViewController.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];
TargetActionViewController *rootVC = [[TargetActionViewController alloc]init];
self.window.rootViewController = rootVC;
[rootVC release];
[self.window makeKeyAndVisible];
return YES;
}
#import "TargetActionViewController.h"
#import "TargetActionView.h"
@interface TargetActionViewController ()
@end
@implementation TargetActionViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
TargetActionView *view1 = [[TargetActionView alloc]initWithFrame:CGRectMake(130, 100, 100, 100)];
view1.backgroundColor = [UIColor magentaColor];
[view1 addTarget:self Action:@selector(changeColor:)];
[self.view addSubview:view1];
TargetActionView *view2 = [[TargetActionView alloc]initWithFrame:CGRectMake(40, 250, 100, 100)];
view2.backgroundColor = [UIColor greenColor];
[view2 addTarget:self Action:@selector(changePosition:)];
[self.view addSubview:view2];
TargetActionView *view3 = [[TargetActionView alloc]initWithFrame:CGRectMake(230, 250, 100, 100)];
view3.backgroundColor = [UIColor purpleColor];
[view3 addTarget:self Action:@selector(changeSize:)];
[self.view addSubview:view3];
[view1 release];
[view2 release];
[view3 release];
}
- (void)changeColor:(TargetActionView *)touchView1
{
touchView1.backgroundColor = [UIColor colorWithRed:arc4random() % 256 / 255.0 green:arc4random() % 256 / 255.0 blue:arc4random() % 256 / 255.0 alpha:1.0];
}
- (void)changePosition:(TargetActionView *)touchView2
{
CGFloat minX = 0;
CGFloat maxX = [[UIScreen mainScreen]bounds].size.width;
CGFloat temp1 = arc4random() % (int)(maxX - minX + 1) + minX;
CGFloat minY = 0;
CGFloat maxY = [[UIScreen mainScreen]bounds].size.height;
CGFloat temp2 = arc4random() % (int)(maxY - minY + 1) + minY;
touchView2.center = CGPointMake(temp1, temp2);
}
- (void)changeSize:(TargetActionView *)touchView3
{
CGFloat minWidth = 38;
CGFloat maxWidth = [[UIScreen mainScreen]bounds].size.width;
CGFloat temp1 = arc4random() % (int)(maxWidth - minWidth + 1) + minWidth;
CGFloat minHeight = 38;
CGFloat maxHeight = [[UIScreen mainScreen]bounds].size.height;
CGFloat temp2 = arc4random() % (int)(maxHeight - minHeight + 1) + minHeight;
touchView3.bounds = CGRectMake(0, 0, temp1, temp2);
}
#import <UIKit/UIKit.h>
@interface TargetActionView : UIView
@property(nonatomic,retain)id target;
@property(nonatomic,assign)SEL action;
- (void)addTarget:(id)target Action:(SEL)action;
@end
#import "TargetActionView.h"
@implementation TargetActionView
- (void)dealloc
{
[_target release];
[super dealloc];
}
- (void)addTarget:(id)target Action:(SEL)action
{
self = [super init];
if (self) {
_target = target;
_action = action;
}
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[_target performSelector:_action withObject:self];
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
}
- (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
