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Preface: company department is organizing group to build recently, need to prepare prepare two group to build small game, be respectively “digital quick calculate upgrade version” and “your words I guess upgrade version”.
After a bit of thinking, I found that these two small projects are very suitable for getting started with iOS, so this article was born. This article will introduce iOS small game project — digital quick calculation upgrade version. I hope this article can help students who are interested in iOS get a quick start on iOS.
The renderings are as follows:
I. Project requirements
- UI level: 8 labels and 3 buttons.
Illustration:
-
Logical level:
- Click the question/Start button to randomly generate three numbers (two digits or less) and two operators (add, subtract, multiply).
- Set a timer from
0
Start the timer until the game ends and check how long the game lasts. - Click create to refresh the topic.
- Click on the result to calculate the result.
- Click the Start button, a popup window appears, click OK, start timing.
-
Problem probability:
- The ones digit is more likely than the two digit.
- Multiplication occurs less often than addition and subtraction.
Second, implementation ideas
- The UI level:
- Method 1: Storyboard (drag controls, add constraints).
- Method two: Pure code.
In the project, I chose the storyboard. When developing independently, storyboards are more efficient.
@property (weak, nonatomic) IBOutlet UILabel *factorLabel1; / /! < digital label1@property (weak, nonatomic) IBOutlet UILabel *factorLabel2; / /! < digital label2@property (weak, nonatomic) IBOutlet UILabel *factorLabel3; / /! < numeric Label3 @property (weak, nonatomic) IBOutlet UILabel *operatorLabel1; / /! < operator label1@property (weak, nonatomic) IBOutlet UILabel *operatorLabel2; / /! < operator label2@property (weak, nonatomic) IBOutlet UILabel *resultLabel; / /! < result Label @property (weak, nonatomic) IBOutlet UILabel *recordingLabel; / /! < timer label@property (weak, nonatomic) IBOutlet UIButton *questionButton; / /! < button@property (weak, nonatomic) IBOutlet UIButton *resultButton; / /! < result button@property (weak, nonatomic) IBOutlet UIButton *startButton; / /! The start ButtonCopy the code
- Business logic:
- Attributes to save:
@property (nonatomic, strong) NSTimer *timer; / /! The < timerCopy the code
- Start button business logic:
- (IBAction)startButtonClicked (UIButton *) Sender {NSString *message = [NSString stringWithFormat:@" do you want %@? ", sender.currentTitle]; UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:message preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction * cancelAction = [UIAlertAction actionWithTitle: @ "cancel" 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]; }Copy the code
- Button business logic:
- (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; }]; }}Copy the code
- Result button business logic:
- (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;
}
}
}
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- Business logic:
- (void)setQuestion { _resultLabel.text = @""; _factorLabel1.text = [self generateFactor]; _factorLabel2.text = [self generateFactor]; _factorLabel3.text = [self generateFactor]; _operatorLabel1.text = [self generateOperator]; _operatorLabel2.text = [self generateOperator]; } / /! GenerateFactor {NSUInteger r = arc4Random () % 10; NSUInteger max = r < 4? 10: r < 7? 20: r < 9? 50:100; NSUInteger factor = arc4random() % max; return @(factor).stringValue; } / /! GenerateOperator - (NSString *)generateOperator {NSUInteger r = arc4random() % 5; NSString *operator = r < 2? @"+": r < 4? @ "-" : @ "x"; return operator; }Copy the code
- Calculation method Business logic:
- (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;
}
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- Reset element logic:
- (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;
}
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- Timer business logic:
- (void)startTimer { [self stopTimer]; _timer = [NSTimer scheduledTimerWithTimeInterval: 1.0 target: self selector: @ the selector (countUp) the userInfo: nil repeats: YES]; } - (void)stopTimer { [_timer invalidate]; _timer = nil; } - (void)countUp { NSInteger count = _recordingLabel.text.integerValue; _recordingLabel.text = @(++count).stringValue; }Copy the code
3. Difficulty: difficulty probability
- Number generation probability algorithm:
The random number | Digital range | The probability of |
---|---|---|
0,1,2,3 | 0 ~ 9 | 40% |
4,5,6 | 0 ~ 20 | 30% |
7, 8 | 0 ~ 50 | 20% |
9 | 0 ~ 100 | 10% |
/ /! GenerateFactor {NSUInteger r = arc4Random () % 10; NSUInteger max = r < 4? 10: r < 7? 20: r < 9? 50:100; NSUInteger factor = arc4random() % max; return @(factor).stringValue; }Copy the code
- Operator generation probability algorithm:
The random number | The operator | The probability of |
---|---|---|
0, 1 | + | 40% |
2, 3 | – | 40% |
4 | x | 20% |
/ /! GenerateOperator - (NSString *)generateOperator {NSUInteger r = arc4random() % 5; NSString *operator = r < 2? @"+": r < 4? @ "-" : @ "x"; return operator; }Copy the code
- Calculation algorithm:
- (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: @ "x"]) {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; }Copy the code
Finally, project source: game source
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