iOS 小游戏项目——数字速算升级版-白红宇

级别： ★☆☆☆☆
标签：「iOS」「小游戏项目」「数字速算」
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前言：最近公司部门在组织团建，需要准备准备两个团建小游戏，分别是“数字速算升级版”和。

小编琢磨了一下，发现这个两个小项目很适合入门iOS，故这篇文章诞生了。本篇将介绍 iOS 小游戏项目——数字速算升级版。希望通过这篇文章，能够帮助对iOS感兴趣的同学快速入门iOS。

效果图如下：

一、项目需求

UI层面： 8个Label，3个Button。

图解：

逻辑层面：
- 点击出题/开始按钮，随机生成三个数（两位数及以下）和两个运算符（加、减、乘）。
- 做一个计时器，从0开始计时，直到游戏结束，查看游戏时长。
- 点击出题，刷新题目。
- 点击结果，计算出结果。
- 点击开始按钮，出现一个弹窗，点击确定，开始计时。

难题概率：
- 个位数出现的概率比两位数高。
- 乘法出现的概率比加减法低。

二、实现思路

UI层面：

方式一：storyboard（拖控件、加约束）。

方式二：纯代码。

项目中，我选择的storyboard。独立开发时，用storyboard比较高效。

@property (weak, nonatomic) IBOutlet UILabel *factorLabel1;//!< 数字Label1@property (weak, nonatomic) IBOutlet UILabel *factorLabel2;//!< 数字Label2@property (weak, nonatomic) IBOutlet UILabel *factorLabel3;//!< 数字Label3@property (weak, nonatomic) IBOutlet UILabel *operatorLabel1;//!< 运算符Label1@property (weak, nonatomic) IBOutlet UILabel *operatorLabel2;//!< 运算符Label2@property (weak, nonatomic) IBOutlet UILabel *resultLabel;//!< 结果Label@property (weak, nonatomic) IBOutlet UILabel *recordingLabel;//!< 计时Label@property (weak, nonatomic) IBOutlet UIButton *questionButton;//!< 出题Button@property (weak, nonatomic) IBOutlet UIButton *resultButton;//!< 结果Button@property (weak, nonatomic) IBOutlet UIButton *startButton;//!< 开始Button复制代码

业务逻辑：

所要保存的属性：

@property (nonatomic, strong) NSTimer *timer;//!< 计时器复制代码

开始按钮业务逻辑：

- (IBAction)startButtonClicked:(UIButton *)sender {        NSString *message = [NSString stringWithFormat:@"确定要 %@ 吗？", sender.currentTitle];    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:message preferredStyle:UIAlertControllerStyleAlert];    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];    UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:sender.currentTitle style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {                sender.selected = !sender.selected;         self.resultButton.enabled = !self.resultButton.enabled;                if (sender.selected) {            [self resetElements];            [self startTimer];        } else {            [self stopTimer];        }    }];    [alertController addAction:cancelAction];    [alertController addAction:confirmAction];        [self.navigationController presentViewController:alertController animated:YES completion:nil];}复制代码

出题按钮业务逻辑：

- (IBAction)questionButtonClicked:(id)sender {        _questionButton.enabled = NO;    _resultButton.enabled = YES;        [self setQuestion];        if (_speechManager) {        _recordingLabel.text = @"";        _recordingLabel.layer.borderWidth = .0;                [_speechManager startRecordingWithResponse:^(NSString * _Nonnull formatString) {            self.recordingLabel.text = [formatString componentsSeparatedByString:@" "].lastObject;        }];    }}复制代码

结果按钮业务逻辑：

- (IBAction)resultButtonClicked:(id)sender {        _questionButton.enabled = YES;    _resultButton.enabled = NO;        _resultLabel.text = @([self calculate]).stringValue;        if (_speechManager) {        [_speechManager stopRecording];                _recordingLabel.layer.borderWidth = 1.0;        if ([_recordingLabel.text isEqualToString:_resultLabel.text]) {            _recordingLabel.layer.borderColor = [UIColor greenColor].CGColor;        } else {            _recordingLabel.layer.borderColor = [UIColor redColor].CGColor;        }    }}复制代码

出题业务逻辑：

- (void)setQuestion {        _resultLabel.text = @"";        _factorLabel1.text = [self generateFactor];    _factorLabel2.text = [self generateFactor];    _factorLabel3.text = [self generateFactor];        _operatorLabel1.text = [self generateOperator];    _operatorLabel2.text = [self generateOperator];}//! 生成数字- (NSString *)generateFactor {        NSUInteger r = arc4random() % 10;    NSUInteger max = r < 4? 10: r < 7? 20: r < 9? 50: 100;    NSUInteger factor = arc4random() % max;        return @(factor).stringValue;}//! 生成运算符- (NSString *)generateOperator {        NSUInteger r = arc4random() % 5;    NSString *operator = r < 2? @"+": r < 4? @"-": @"×";        return operator;}复制代码

计算方法业务逻辑：

- (NSInteger)calculate {        NSUInteger factor1 = _factorLabel1.text.integerValue;    NSUInteger factor2 = _factorLabel2.text.integerValue;    NSUInteger factor3 = _factorLabel3.text.integerValue;        NSString *operator1 = _operatorLabel1.text;    NSString *operator2 = _operatorLabel2.text;        NSInteger result = [self calculateWithOperator:operator1 leftFactor:factor1 rightFactor:factor2];    if ([operator2 isEqualToString:@"×"]) {        result = [self calculateWithOperator:operator2 leftFactor:factor2 rightFactor:factor3];        result = [self calculateWithOperator:operator1 leftFactor:factor1 rightFactor:result];    } else {        result = [self calculateWithOperator:operator2 leftFactor:result rightFactor:factor3];    }        return result;}- (NSUInteger)calculateWithOperator:(NSString *)operator leftFactor:(NSUInteger)leftFactor rightFactor:(NSUInteger)rightFactor  {        NSInteger result = leftFactor;        if ([operator isEqualToString:@"+"]) {        result += rightFactor;    } else if ([operator isEqualToString:@"-"]) {        result -= rightFactor;    } else {        result *= rightFactor;    }        return result;}复制代码

重置元素逻辑：

- (void)resetElements {        _factorLabel1.text = @"0";    _factorLabel2.text = @"0";    _factorLabel3.text = @"0";        _operatorLabel1.text = @"+";    _operatorLabel2.text = @"+";        _resultLabel.text = @"0";    _recordingLabel.text = @"0";        _questionButton.enabled = YES;    _resultButton.enabled = YES;}复制代码

定时器业务逻辑：

- (void)startTimer {        [self stopTimer];        _timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(countUp) userInfo:nil repeats:YES];}- (void)stopTimer {        [_timer invalidate];    _timer = nil;}- (void)countUp {        NSInteger count = _recordingLabel.text.integerValue;    _recordingLabel.text = @(++count).stringValue;}复制代码

三、难点：难题概率

数字生成概率算法：

随机数	数字范围	概率
0，1，2，3	0~9	40%
4，5，6	0~20	30%
7，8	0~50	20%
9	0~100	10%

//! 生成数字- (NSString *)generateFactor {        NSUInteger r = arc4random() % 10;    NSUInteger max = r < 4? 10: r < 7? 20: r < 9? 50: 100;    NSUInteger factor = arc4random() % max;        return @(factor).stringValue;}复制代码

运算符生成概率算法：

随机数	运算符	概率
0，1	+	40%
2，3	-	40%
4	x	20%

//! 生成运算符- (NSString *)generateOperator {        NSUInteger r = arc4random() % 5;    NSString *operator = r < 2? @"+": r < 4? @"-": @"×";        return operator;}复制代码

计算算法：

- (NSInteger)calculate {        NSUInteger factor1 = _factorLabel1.text.integerValue;    NSUInteger factor2 = _factorLabel2.text.integerValue;    NSUInteger factor3 = _factorLabel3.text.integerValue;        NSString *operator1 = _operatorLabel1.text;    NSString *operator2 = _operatorLabel2.text;        NSInteger result = [self calculateWithOperator:operator1 leftFactor:factor1 rightFactor:factor2];    if ([operator2 isEqualToString:@"×"]) {        result = [self calculateWithOperator:operator2 leftFactor:factor2 rightFactor:factor3];        result = [self calculateWithOperator:operator1 leftFactor:factor1 rightFactor:result];    } else {        result = [self calculateWithOperator:operator2 leftFactor:result rightFactor:factor3];    }        return result;}- (NSUInteger)calculateWithOperator:(NSString *)operator leftFactor:(NSUInteger)leftFactor rightFactor:(NSUInteger)rightFactor  {        NSInteger result = leftFactor;        if ([operator isEqualToString:@"+"]) {        result += rightFactor;    } else if ([operator isEqualToString:@"-"]) {        result -= rightFactor;    } else {        result *= rightFactor;    }        return result;}复制代码

最后，工程源码：

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