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- #pragma mark -
- #pragma mark PickerView Data Source
- - (NSInteger)numberOfComponentsInPickerView:
- (UIPickerView *)pickerView
- {
- return 2;
- }
- - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
- {
- if (component == 0) {
- return [_convertFrom count];
- }
- return [_convertTo count];
- }
- - (NSString *) pickerView: (UIPickerView *)pickerView
- titleForRow:(NSInteger)row
- forComponent:(NSInteger)component
- {
- if (component == 0) {
- return [_convertFrom objectAtIndex:row];
- }
- return [_convertTo objectAtIndex:row];
- }
- #pragma mark -
- #pragma mark PickerView Delegate
- -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
- {
- [self updateConversionLabel];
- }
- - (void)updateConversionLabel
- {
- double convertFrom = [[_convertRates objectAtIndex:[picker selectedRowInComponent:0]] doubleValue];
- double convertTo = [[_convertRates objectAtIndex:[picker selectedRowInComponent:1]] doubleValue];
- NSNumberFormatter *fmt = [NSNumberFormatter new];
- double input = [fmt numberFromString:inputText.text].doubleValue;
- double to = convertTo;
- double from = convertFrom;
- double convertValue = input;
- double relative = to / from;
- double result = relative * convertValue;
- NSString *convertFromName = [_convertFrom objectAtIndex:[picker selectedRowInComponent:0]];
- NSString *convertToName = [_convertFrom objectAtIndex:[picker selectedRowInComponent:1]];
- NSNumber *inputNumber = [[NSNumber alloc ]initWithDouble:convertValue];
- NSNumber *resultNumber = [[NSNumber alloc]initWithDouble:result];
- NSNumberFormatter *formatterResult = [[NSNumberFormatter alloc] init];
- formatterResult.numberStyle = NSNumberFormatterDecimalStyle;
- NSNumberFormatter *formatterInput = [[NSNumberFormatter alloc] init];
- formatterInput.numberStyle = NSNumberFormatterDecimalStyle;
- [formatterResult setNumberStyle:NSNumberFormatterDecimalStyle];
- [formatterResult setMaximumFractionDigits:6];
- [formatterInput setNumberStyle:NSNumberFormatterDecimalStyle];
- [formatterInput setMaximumFractionDigits:6];
- NSString *formattedResultString = [formatterResult stringFromNumber:(NSNumber*)resultNumber];
- NSString *formattedInputString = [formatterInput stringFromNumber:(NSNumber*)inputNumber];
- NSString *formelString = [[NSString alloc]initWithFormat:
- @" %@ %@ =", formattedInputString, convertFromName];
- formelLabel.text = formelString;
- NSString *resultString = [[NSString alloc]initWithFormat:
- @" %@ %@",formattedResultString, convertToName];
- resultLabel.text = resultString;
- }
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