[IOS范例小计]计数器-启示就是简单的按钮方法操作，主要学习目的时增加图片显示

[IOS实例小计]计数器--启示就是简单的按钮方法操作，主要学习目的时增加图片显示

直接上代码：

//
//  CountMeViewController.h
//  ImageView
//
//  Created by zhang xujun on 13-9-9.
//  Copyright (c) 2013年 zhang xujun. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface CountMeViewController : UIViewController


@property (strong,nonatomic) IBOutlet UIButton *returnSuperView;
@property (strong,nonatomic) IBOutlet UILabel *countLabel;
@property (strong,nonatomic) IBOutlet UIButton *add;
@property (strong,nonatomic) IBOutlet UIButton *sub;
@property (strong,nonatomic) IBOutlet UIButton *reset;
-(IBAction)returnSuperView:(id)sender;
-(IBAction)countAdd:(id)sender;
-(IBAction)countSub:(id)sender;
-(IBAction)reset:(id)sender;
@end

//
//  CountMeViewController.m
//  ImageView
//
//  Created by zhang xujun on 13-9-9.
//  Copyright (c) 2013年 zhang xujun. All rights reserved.
//

#import "CountMeViewController.h"

@interface CountMeViewController ()

@end

@implementation CountMeViewController
@synthesize  returnSuperView;
@synthesize countLabel;
@synthesize add;
@synthesize sub;
@synthesize reset;

int count = 0;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.countLabel.text = @"0";
    
}
-(void)countAdd:(id)sender{

    if (count>=99) {
        return;
    }
    NSString *addCount = [[NSString alloc] initWithFormat:@"%d",++count];
    self.countLabel.text = addCount;
    
    
}
-(void)countSub:(id)sender{

    if (count<=0) {
        return;
    }
    NSString *subCount = [[NSString alloc] initWithFormat:@"%d",--count];
    self.countLabel.text = subCount;
    
}
-(void)reset:(id)sender{

    count = 0;
    self.countLabel.text = @"0";
    
}
-(void)returnSuperView:(id)sender{

    [self.view removeFromSuperview];
}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    
}

@end

效果：