检索UITextfField值并转换为带小数的英寸?

问题描述

如果我为以下文本字段设置格式:

If I have formatting for a textfield like:

//Formats the textfield based on the pickers.
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {

NSString *result = [feetArray objectAtIndex:[feetPicker selectedRowInComponent:0]];

result = [result stringByAppendingFormat:@"%@ft", [feetArray objectAtIndex:[feetPicker selectedRowInComponent:1]]];
result = [result stringByAppendingFormat:@" %@", [inchArray objectAtIndex:[inchesPicker selectedRowInComponent:0]]];
result = [result stringByAppendingFormat:@"%@", [inchArray objectAtIndex:[inchesPicker selectedRowInComponent:1]]];
result = [result stringByAppendingFormat:@" %@in", [fractionArray objectAtIndex:[fractionPicker selectedRowInComponent:0]]];

myTextField.text = result;
}

哪个显示在文本字段中，例如 00ft 00 0/16in ，如何将所有显示内容更改为带有小数的英寸?我需要将ft乘以12 =变量，然后将其乘以英寸，然后将我的分数1/16除以16得到我的十进制值，然后将其与英寸相加显示为1234.0625，以便进行计算.有人可以帮我做到这一点吗?先感谢您！

Which display's in the textfield like 00ft 00 0/16in How can I change that all to inches with decimal? I'll need to take the ft, and multiply by 12 = variable.Then add that to inches, as well as take my fraction 1/16 and divide that by 16 to get my decimal value and then add that to the inches so it shows like 1234.0625 in order to make my calculation. Can someone help me accomplish this? Thank you in advance!

推荐答案

NSString * theString = RiseTextField.text;
NSString * feetString = [theString substringWithRange:NSMakeRange(0, 2)];
NSString * inchesString = [theString substringWithRange:NSMakeRange(5, 2)];
NSUInteger rangeLength = ([theString length] == 14) ? 1 : 2;
NSString * fractionString = [theString substringWithRange:NSMakeRange(8, rangeLength)];

double totalInInches = [feetString doubleValue] * 12 + [inchesString doubleValue] + [fractionString doubleValue] / 16;

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