[IOS实例小计]计数器--启示就是简单的按钮方法操作，主要学习目

直接上代码： p> 

p>//  

p>//  CountMeViewController.h  

p>//  ImageView  

p>//  

p>//  Created by zhang xujun on 13-9-9.  

p>//  Copyright (c) 2013年 zhang xujun. All rights reserved.  

p>//  

p>  

p>#import <UIKit/UIKit.h>  

p>  

p>@interface CountMeViewController : UIViewController  

p>  

p>  

p>@property (strong,nonatomic) IBOutlet UIButton *returnSuperView;  

p>@property (strong,nonatomic) IBOutlet UILabel *countLabel;  

p>@property (strong,nonatomic) IBOutlet UIButton *add;  

p>@property (strong,nonatomic) IBOutlet UIButton *sub;  

p>@property (strong,nonatomic) IBOutlet UIButton *reset;  

p>-(IBAction)returnSuperView:(id)sender;  

p>-(IBAction)countAdd:(id)sender;  

p>-(IBAction)countSub:(id)sender;  

p>-(IBAction)reset:(id)sender;  

p>@end  

p>//  

p>//  CountMeViewController.m  

p>//  ImageView  

p>//  

p>//  Created by zhang xujun on 13-9-9.  

p>//  Copyright (c) 2013年 zhang xujun. All rights reserved.  

p>//  

p>  

p>#import "CountMeViewController.h"  

p>  

p>@interface CountMeViewController ()  

p>  

p>@end  

p>  

p>@implementation CountMeViewController  

p>@synthesize  returnSuperView;  

p>@synthesize countLabel;  

p>@synthesize add;  

p>@synthesize sub;  

p>@synthesize reset;  

p>  

p>int count = 0;  

p>  

p>- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil  

p>{  

p>    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];  

p>    if (self) {  

p>        // Custom initialization  

p>    }  

p>    return self;  

p>}  

p>  

p>- (void)viewDidLoad  

p>{  

p>    [super viewDidLoad];  

p>    self.countLabel.text = @"0";  

p>      

p>}  

p>-(void)countAdd:(id)sender{  

p>  

p>    if (count>=99) {  

p>        return;  

p>    }  

p>    NSString *addCount = [[NSString alloc] initWithFormat:@"%d",++count];  

p>    self.countLabel.text = addCount;  

p>      

p>      

p>}  

p>-(void)countSub:(id)sender{  

p>  

p>    if (count<=0) {  

p>        return;  

p>    }  

p>    NSString *subCount = [[NSString alloc] initWithFormat:@"%d",--count];