浮点值返回0？

时间：2011-04-02 15:56:10

标签： objective-c cocoa ios4 xcode4

好的，这将会有点长，我为此道歉，但在这里。

我正在开发的应用程序是一个计算体脂百分比的“健身”应用程序。它有男性侧和女性侧。

我有3个男性课程和3个女性课程。 

 maleBFCinput 
 maleBFCdata
 maleBFCresults

 femaleBFCinput
 femaleBFCdata
 femaleBFCresults

在输入类中，我有用于用户输入的文本字段，计算在“maleBFCinput.m”中进行。计算完成后，它们将转移到“数据”类，然后转移到“结果”类。

男方工作完美无瑕。然而女性方面就是问题所在。在results.xib我有7个标签。年龄/身高/体重/体重/最大体重/体脂/体脂。

女性结果上的“bodyfat”标签返回0。使用我用来计算男性一面的相同技术，按照预期的方式工作，我一直得到0。

我在输入屏幕上使用浮动来保存较小计算中的所有“临时值”，然后进入“体脂计算”。

下面是我拥有的小代码段。

femaleBFCinput.h 

    UITextField *ageInput;
    UITextField *heightInput;
    UITextField *weightInput;
    UITextField *hips1Input;
    UITextField *hips2Input;
    UITextField *hips3Input;
    UITextField *neck1Input;
    UITextField *neck2Input;
    UITextField *neck3Input;
    UITextField *abdomen1Input;
    UITextField *abdomen2Input;
    UITextField *abdomen3Input;

    float heightFactor;
    float weightFactor;
    float abHipsFactor;
    float abFactor;
    float neckFactor;
    float minWeight;
    float maxWeight;
    float maxBodyFatPercentage;
    float abdomenAvg;
    float neckAvg;
    float hipsAvg;
    float abHipsValue;
    float abNeckSubValue;
    float bodyFatPercentage;
    float circumferenceValue;

}

@property(nonatomic,retain) IBOutlet UITextField *ageInput;
@property(nonatomic,retain) IBOutlet UITextField *weightInput;
@property(nonatomic,retain) IBOutlet UITextField *heightInput;
@property(nonatomic,retain) IBOutlet UITextField *abdomen1Input;
@property(nonatomic,retain) IBOutlet UITextField *abdomen2Input;
@property(nonatomic,retain) IBOutlet UITextField *abdomen3Input;
@property(nonatomic,retain) IBOutlet UITextField *neck1Input;
@property(nonatomic,retain) IBOutlet UITextField *neck2Input;
@property(nonatomic,retain) IBOutlet UITextField *neck3Input;
@property(nonatomic,retain) IBOutlet UITextField *hips1Input;
@property(nonatomic,retain) IBOutlet UITextField *hips2Input;
@property(nonatomic,retain) IBOutlet UITextField *hips3Input;

- (float) getMinWeight;
- (float) getMaxWeight;
- (float) getCircumferenceValue;
- (float) getMaxBodyFatPercentage;
- (float) getAbdomenAvg;
- (float) getNeckAvg;
- (float) getAbHipsFactor;
- (float) getBodyFatPercentage;
- (float) getHipsAvg;

femaleBFCinput.m 

// Get Abdomen Avg..

- (float) getAbdomenAvg
{
    float abdomen1Float = [abdomen1Input.text floatValue];
    float abdomen2Float = [abdomen2Input.text floatValue];
    float abdomen3Float = [abdomen3Input.text floatValue];

    (abdomenAvg = ((abdomen1Float + abdomen2Float + abdomen3Float) / 3));

    return abdomenAvg;
}

// Get Neck Avg..

- (float) getNeckAvg
{
    float neck1Float = [neck1Input.text floatValue];
    float neck2Float = [neck2Input.text floatValue];
    float neck3Float = [neck3Input.text floatValue];

    (neckAvg = ((neck1Float + neck2Float + neck3Float) / 3));
    return neckAvg;
}

// Get Hips Avg..

- (float) getHipsAvg
{
    float hips1Float = [hips1Input.text floatValue];
    float hips2Float = [hips2Input.text floatValue];
    float hips3Float = [hips3Input.text floatValue];

    (hipsAvg = ((hips1Float + hips2Float + hips3Float) / 3));
    return hipsAvg;
}

//-----Get AbNeck Factor----------------------------------

- (float) getAbHipsFactor
{
    float abTempAvg = [self getAbdomenAvg];
    float hipsTempAvg = [self getHipsAvg];

    (abHipsValue = (abTempAvg + hipsTempAvg));

    return abHipsValue;
}


//----Get Circumference Value-----------------------------

- (float) getCircumferenceValue
{

    (circumferenceValue = (abHipsValue - neckAvg));

    return circumferenceValue;
}

// Get Body Fat Percentage..

- (float) getBodyFatPercentage
{
    float circumferenceTempValue = [self getCircumferenceValue];
    float heightTempValue = [heightInput.text floatValue];


    if (heightTempValue >= 58.00 && heightTempValue <= 58.49) {
        if (circumferenceTempValue >= 45.00 && circumferenceTempValue <= 45.49) {bodyFatPercentage = 19;}
        else if (circumferenceTempValue >= 45.50 && circumferenceTempValue <= 45.99) {bodyFatPercentage = 20;}
        else if (circumferenceTempValue >= 46.00 && circumferenceTempValue <= 46.49) {bodyFatPercentage = 21;}
        else if (circumferenceTempValue >= 46.50 && circumferenceTempValue <= 46.99) {bodyFatPercentage = 21;}

 else if (heightTempValue >= 77.50 && heightTempValue <= 77.99) {
        if (circumferenceTempValue >= 53.50 && circumferenceTempValue <= 53.99) {bodyFatPercentage = 19;}
        else if (circumferenceTempValue >= 54.00 && circumferenceTempValue <= 54.49) {bodyFatPercentage = 20;}
        else if (circumferenceTempValue >= 54.50 && circumferenceTempValue <= 54.99) {bodyFatPercentage = 20;}
        else if (circumferenceTempValue >= 55.00 && circumferenceTempValue <= 55.49) {bodyFatPercentage = 21;}

        etc..
        etc.. (theres about 4000ish lines of if / else if statements in here so i just pasted a few so you see what i have)

        else if (circumferenceTempValue >= 77.50 && circumferenceTempValue <= 77.99) {bodyFatPercentage = 45;}
        else if (circumferenceTempValue >= 78.00 && circumferenceTempValue <= 78.49) {bodyFatPercentage = 46;}
        else if (circumferenceTempValue >= 78.50 && circumferenceTempValue <= 78.99) {bodyFatPercentage = 46;}
        else if (circumferenceTempValue >= 79.00 && circumferenceTempValue <= 79.49) {bodyFatPercentage = 47;}
    }

    return bodyFatPercentage;

}



- (IBAction)calculate:(id)sender {

    FemaleBFCresults *femaleBFCresults = [[FemaleBFCresults alloc] initWithNibName:@"FemaleBFCresults" bundle:nil];

    FemaleBFCdata *femaleBFCData = [[FemaleBFCdata alloc] init];
    femaleBFCresults.femaleBFCdata = femaleBFCData;

    femaleBFCresults.femaleBFCdata.ageInput = ageInput.text;
    femaleBFCresults.femaleBFCdata.heightInput = heightInput.text;
    femaleBFCresults.femaleBFCdata.weightInput = weightInput.text;

    NSString *minWeightString = [[NSString alloc] initWithFormat:@"%.0f", [self getMinWeight]];
    femaleBFCresults.femaleBFCdata.minWeight = minWeightString;
    [minWeightString release];

    NSString *maxWeightString = [[NSString alloc] initWithFormat:@"%.0f", [self getMaxWeight]];
    femaleBFCresults.femaleBFCdata.maxWeight = maxWeightString;
    [maxWeightString release];

    NSString *maxBodyFatString = [[NSString alloc] initWithFormat:@"%.0f", [self getMaxBodyFatPercentage]];
    femaleBFCresults.femaleBFCdata.maxBodyFat = maxBodyFatString;
    [maxBodyFatString release];

    NSString *bodyFatString = [[NSString alloc] initWithFormat:@"%.0f", [self getBodyFatPercentage]];
    femaleBFCresults.femaleBFCdata.bodyFat = bodyFatString;
    [bodyFatString release];


    femaleBFCresults.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
    [self presentModalViewController:femaleBFCresults animated:YES];
    [self.view removeFromSuperview];
    [femaleBFCresults release];

}

femaleBFCdata.h 

@interface FemaleBFCdata : NSObject {


    NSString *ageInput;
    NSString *heightInput;
    NSString *weightInput;
    NSString *neckAvg;
    NSString *abAvg;
    NSString *hipsAvg;
    NSString *abHipFactor;
    NSString *bodyFat;
    NSString *maxBodyFat;
    NSString *minWeight;
    NSString *maxWeight;
    NSString *circumference;

}

@property (nonatomic, retain) NSString *ageInput;
@property (nonatomic, retain) NSString *heightInput;
@property (nonatomic, retain) NSString *weightInput;
@property (nonatomic, retain) NSString *neckAvg;
@property (nonatomic, retain) NSString *abAvg;
@property (nonatomic, retain) NSString *hipsAvg;
@property (nonatomic, retain) NSString *abHipFactor;
@property (nonatomic, retain) NSString *bodyFat;
@property (nonatomic, retain) NSString *maxBodyFat;
@property (nonatomic, retain) NSString *minWeight;
@property (nonatomic, retain) NSString *maxWeight;
@property (nonatomic, retain) NSString *circumference;

femaleBFCdata.m 

@synthesize ageInput;
@synthesize heightInput;
@synthesize weightInput;
@synthesize neckAvg;
@synthesize abAvg;
@synthesize hipsAvg;
@synthesize abHipFactor;
@synthesize bodyFat;
@synthesize maxBodyFat;
@synthesize minWeight;
@synthesize maxWeight;
@synthesize circumference;

- (void)dealloc {

    self.ageInput = nil;
    self.heightInput = nil;
    self.weightInput = nil;
    self.neckAvg = nil;
    self.abAvg = nil;
    self.hipsAvg = nil;
    self.abHipFactor = nil;
    self.bodyFat = nil;
    self.maxBodyFat = nil;
    self.minWeight = nil;
    self.maxWeight = nil;
    self.circumference = nil;
    [super dealloc];
}

femaleBFCresults.h 

@interface FemaleBFCresults : UIViewController {

    FemaleBFCdata *femaleBFCdata;
    UILabel *displayAge;
    UILabel *displayHeight;
    UILabel *displayWeight;
    UILabel *displayBodyFat;
    UILabel *displayMaxBodyFat;
    UILabel *displayMinWeight;
    UILabel *displayMaxWeight;

}

@property (nonatomic, retain) FemaleBFCdata *femaleBFCdata;
@property (nonatomic, retain) IBOutlet UILabel *displayAge;
@property (nonatomic, retain) IBOutlet UILabel *displayHeight;
@property (nonatomic, retain) IBOutlet UILabel *displayWeight;
@property (nonatomic, retain) IBOutlet UILabel *displayBodyFat;
@property (nonatomic, retain) IBOutlet UILabel *displayMaxBodyFat;
@property (nonatomic, retain) IBOutlet UILabel *displayMinWeight;
@property (nonatomic, retain) IBOutlet UILabel *displayMaxWeight;

- (IBAction)goBack:(id)sender;

@end

femaleBFCdata.m 

@synthesize femaleBFCdata;
@synthesize displayAge;
@synthesize displayHeight;
@synthesize displayWeight;
@synthesize displayBodyFat;
@synthesize displayMaxBodyFat;
@synthesize displayMinWeight;
@synthesize displayMaxWeight;

- (void)viewDidLoad {

    self.displayAge.text = femaleBFCdata.ageInput;
    self.displayHeight.text = femaleBFCdata.heightInput;
    self.displayWeight.text = femaleBFCdata.weightInput;
    self.displayBodyFat.text = femaleBFCdata.bodyFat;
    self.displayMaxBodyFat.text = femaleBFCdata.maxBodyFat;
    self.displayMinWeight.text = femaleBFCdata.minWeight;
    self.displayMaxWeight.text = femaleBFCdata.maxWeight;

    [super viewDidLoad];
}

- (void)dealloc {

    [displayAge dealloc];
    [displayHeight dealloc];
    [displayWeight dealloc];
    [displayBodyFat dealloc];
    [displayMaxBodyFat dealloc];
    [displayMinWeight dealloc];
    [displayMaxWeight dealloc];

    [super dealloc];
}

就像我说男性课程的完成方式完全相同。但是对于女性课程，我在结果课上一直得到0回报，我似乎无法弄清楚为什么。我已经在这个问题上工作了几个月了。我休息了几个星期，我认为我休息之前我休息但我想我没有。有没有人有任何想法可以帮我解决这个问题？

2 个答案:

答案 0 :(得分：3)

您绝对确定您的输入字段是否全部连接？询问-floatValue的nil出口会给你一个nil（解释为0）响应。

答案 1 :(得分：0)

好的，所以我通过四舍五入所有“平均值”来计算，然后才进入“bodyfatcalculations”

 - (float)getabHipAvg {
     float ab1 = [abdomen1Input.text floatValue];
     float ab2 = [abdomen2Input.text floatValue];
     float ab3 = [abdomen3Input.text floatValue];
     float hip1 = [hips1Input.text floatValue];
     float hip2 = [hips2Input.text floatValue];
     float hip3 = [hips3Input.text floatValue];

     (abHipAvg = (((ab1+ab2+ab3)/3)+((hip1+hip2+hip3)/3)));
     abHipAvg = roundf(abHipAvg * 2.0f) / 2.0f;

     return abHipAvg; }

 - (float)getneckAvg {
     float neck1 = [neck1Input.text floatValue];
     float neck2 = [neck2Input.text floatValue];
     float neck3 = [neck3Input.text floatValue];

     (neckAvg = ((neck1+neck2+neck3)/3));
     neckAvg = roundf(neckAvg * 2.0f) / 2.0f;

     return neckAvg;
      }

 - (float)getCircumferenceValue {
     float abHipTempAvg = [self getabHipAvg];
     float neckTempAvg = [self getneckAvg];

     (circumferenceValue = (abHipTempAvg - neckTempAvg));
     circumferenceValue = roundf(circumferenceValue *2.0f) / 2.0f;

    return circumferenceValue; }

所以，这就是我的解决方案，所有if / else if语句都没有错，事实上除以3得到平均值给了我一个比我需要的更长的小数，所以通过舍入它们到最近的一半解决了我的问题。现在我得到的答案就是出来了。

感谢大家的帮助!!

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