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POHow To Get Selected Value From UIPickerView With 2 Components
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  1. POHow To Get Selected Value From UIPickerView With 2 Components
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    copied!<p>I have a question here where I asked how to get a value form UIPickerView ( <a href="https://stackoverflow.com/questions/5725580/how-to-get-selected-value-from-uipickerview">How To Get Selected Value From UIPickerView</a> ). I got a solution for a picker with 1 component but I'm trying to get the value from picker with 2 component now.</p> <p>This code works for picker with 1 component:</p> <pre><code> NSInteger row; NSString *weightSelected; row = [repPicker selectedRowInComponent:0]; weightSelected = [pickerArray objectAtIndex:row]; </code></pre> <p>I tired this code for my picker with 2 components, but it is freezing. There is no error in the console either. The line it is freezing at is <code>row2 = [repPicker selectedRowInComponent:1]; </code>:</p> <pre><code> NSInteger row1, row2; NSString *weightSelected1; NSString *weightSelected2; row1 = [repPicker selectedRowInComponent:0]; row2 = [repPicker selectedRowInComponent:1]; weightSelected1 = [pickerArray objectAtIndex:row1]; weightSelected2 = [pickerArray objectAtIndex:row2]; NSString *weightSelected = [NSString stringWithFormat:@"%@.%@", weightSelected1, weightSelected2]; </code></pre> <p>UPDATE:</p> <pre><code>#pragma mark - Weight Picker - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView { if (thePickerView.tag==1) { return 2; } else return 1; } - (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component { if (thePickerView.tag==1) { if (component == 0) return [pickerArray count]; if (component == 1) return [pickerArrayHalf count]; } else return [pickerArray count]; } - (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { // NSLog(@"Selected Color: %@. Index of selected color: %i", [weightArray objectAtIndex:row], row); } - (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view { if (pickerView.tag==1) { if (component == 0) { UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 37)]; int weight = [[pickerArray objectAtIndex:row] intValue]; label.text = [NSString stringWithFormat:@"%d", weight]; label.textAlignment = UITextAlignmentCenter; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont boldSystemFontOfSize:30]; [label autorelease]; return label; } else { UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 37)]; label.text = [pickerArrayHalf objectAtIndex:row]; label.textAlignment = UITextAlignmentCenter; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont boldSystemFontOfSize:30]; [label autorelease]; return label; } } else { int reps = [[pickerArray objectAtIndex:row] intValue]; UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 300, 37)]; label.text = [NSString stringWithFormat:@"%d reps", reps]; label.textAlignment = UITextAlignmentCenter; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont boldSystemFontOfSize:30]; [label autorelease]; return label; } } </code></pre> <p>Update again:</p> <p>I added this code:</p> <pre><code>- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { NSLog(@"Selected Color: %@. Index of selected row: %i", [pickerArray objectAtIndex:row], row); NSLog(@"Component 0: %@", [repPicker selectedRowInComponent:0]); NSLog(@"Component 1: %@", [repPicker selectedRowInComponent:1]); } </code></pre> <p>I now get a crash when scrolling the clicker now at line: NSLog(@"Component 1: %@", [repPicker selectedRowInComponent:1]);</p> <p>error:</p> <blockquote> <p><strong>* Terminating app due to uncaught exception 'NSRangeException', reason: '*</strong> -[NSMutableArray objectAtIndex:]: index 1 beyond bounds [0 .. 0]'</p> </blockquote> <p>I also got <code>Component 0: (null)</code></p> <p>Update:</p> <p>Code for declaring pickerArray:</p> <pre><code>pickerArray = [[NSMutableArray alloc] initWithCapacity:700]; for ( int i = 0 ; i &lt;= 1000 ; ++i) [pickerArray addObject:[NSString stringWithFormat:@"%d", i]]; pickerArrayHalf = [[NSMutableArray alloc]initWithCapacity:2]; [pickerArrayHalf addObject:@"0 lb"]; [pickerArrayHalf addObject:@"1/2 lb"]; </code></pre>
 

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