UIKit基础:15-与电脑玩剪刀石头布

在前面, 我们学会了许多空间, 也利用了控件做了某些事情, 现在我们来用控件和电脑玩个小游戏, 也就是我们以前经常玩的游戏, 剪刀石头布:

搭建storyboard界面:

这里有一个注意点, 就是石头剪刀布的下面还有一个按钮:

记得要添加进去, 添加进去之后, 就把View恢复到第一张图的样子:

然后我们来关联控件:

在这里, 我们需要导入两个框架, 一个是AVFoundation, 另一个是AudioToolbox, 下面让我们来看看怎么实现:

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
#import <AudioToolbox/AudioToolbox.h>

@interface ViewController ()
{
    NSArray *_imageList;
    AVAudioPlayer *_backMuiscPlayer;
    
    SystemSoundID _winSound;
    SystemSoundID _faildSound;
    SystemSoundID _drewSound;
    SystemSoundID _clickSound;
}
@end

- (void)viewDidLoad {
    [super viewDidLoad];
    // 1.设置数组
    _imageList = @[[UIImage imageNamed:@"石头"],
                       [UIImage imageNamed:@"剪刀"],
                       [UIImage imageNamed:@"布"]
                       ];
    
    // 2.设置图像的动画数组
    [_computerImageView setAnimationImages:_imageList];
    [_playerImageView setAnimationImages:_imageList];
    // 3.设置图像的动画时长
    [_computerImageView setAnimationDuration:1.0f];
    [_playerImageView setAnimationDuration:1.0f];
    // 4.开始动画
    [_computerImageView startAnimating];
    [_playerImageView startAnimating];
    
    _backMuiscPlayer = [self loadPlayer];
    [_backMuiscPlayer setVolume:0.3f];
    [_backMuiscPlayer play];

    _winSound = [self loadSound:@"胜利.aiff"];
    _faildSound = [self loadSound:@"失败.aiff"];
    _drewSound = [self loadSound:@"和局.aiff"];
    _clickSound = [self loadSound:@"点击按钮.aiff"];

}

#pragma mark 初始化播放器
- (AVAudioPlayer *)loadPlayer
{
    // 5.初始化音乐播放器
    // 5.1初始化播放器需要指定音乐文件的路径
    NSString *path = [[NSBundle mainBundle] pathForResource:@"背景音乐" ofType:@"caf"];
    // 5.2将路径转换为URL
    NSURL *url = [NSURL fileURLWithPath:path];
    // 5.3初始化音乐播放器
    AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:nil];
    
    // 6.设置播放器属性
    // 设置播放次数
    [player setNumberOfLoops:-1];
    [player prepareToPlay];
    [player play];
    return player;
}

#pragma mark 加载音效
- (SystemSoundID)loadSound:(NSString *)soundFileName
{
    // 1.需要指定声音的文件路径.
    NSString *path = [[NSBundle mainBundle] pathForResource:soundFileName ofType:nil];
    
    // 2.将路径字符串转换成URL
    NSURL *url = [NSURL fileURLWithPath:path];
    
    // 3.初始化音效
    SystemSoundID soundID;
    AudioServicesCreateSystemSoundID((__bridge CFURLRef)(url), &soundID);

    return soundID;
}

- (IBAction)resumeGame:(UIButton *)sender {
    [UIView animateWithDuration:0.5f animations:^{
        [_actionView setCenter:CGPointMake(_actionView.center.x, _actionView.center.y - 120)];
    }];

    [_computerImageView startAnimating];
    [_playerImageView startAnimating];

    [_messageLabel setText:@""];
}

- (IBAction)playerAction:(UIButton *)sender
{
    NSLog(@"player tag:%ld", sender.tag);
    
    NSUInteger computerResult = arc4random_uniform(3);
    NSUInteger playerResult = sender.tag;
    
    NSUInteger result = playerResult - computerResult;
    
    NSString *string;
    
    // 判断胜负结果
    if (result == 0) {
        AudioServicesPlaySystemSound(_drewSound);
        string = @"哎哟,平局了";
    } else if (result == -1 || result == 2) {
        AudioServicesPlaySystemSound(_winSound);
        string = @"哦耶,你赢了";
        NSUInteger playerScore = [_playerLabel.text integerValue];
        playerScore++;
        [_playerLabel setText:[NSString stringWithFormat:@"%ld", playerScore]];
    } else {
        AudioServicesPlaySystemSound(_faildSound);
        string = @"太可惜了,再接再厉";
        NSUInteger computerScore = [_computerLabel.text integerValue];
        computerScore++;
        [_computerLabel setText:[NSString stringWithFormat:@"%ld", computerScore]];
    }
    [_messageLabel setText:string];

    // 停止动画
    [_computerImageView stopAnimating];
    [_playerImageView stopAnimating];
    
    // 设置图片
    [_computerImageView setImage:_imageList[computerResult]];
    [_playerImageView setImage:_imageList[playerResult]];
    
    [UIView animateWithDuration:0.5f animations:^{
        [_actionView setCenter:CGPointMake(_actionView.center.x, _actionView.center.y + 120)];
    }];

}

最终的效果就由大家自行去看了, 现在我们来解释一下:

arc4random_uniform(): 随机函数.

AVFoundation:音频框架

AudioToolbox:音频框架

编程思想:

 1. 让计算机和玩家的图片播放序列帧动画

    提示：序列帧动画的图像顺序，最好和界面上的TAG保持一致

 2. 等待玩家出拳，判定游戏结果

 

 播放声音的顺序

 1. 引入AVFundation框架头文件

 2. 定义声音播放器

 3. 初始化声音播放器

 4. 设置声音播放器属性

 5. 开始播放