问题
pickerArray = [[NSArray arrayWithObjects:@"20", @"40", @"60",@"80", @"100", @"120", @"140", @"160", @"180", @"200",nil] retain];
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
//On Selecting the component row
if (component == 0) {
} else if (component == 1) {
[quantityPickerDelegate didChangeLabelText:[pickerArray objectAtIndex:row]];// delegate passing the selected value
pickerLabel.textColor = [UIColor colorWithRed:0.0745 green:0.357 blue:1.0 alpha:1];
}
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
//Picker view content added
pickerLabel = [[UILabel alloc] init];
pickerLabel.backgroundColor=[UIColor clearColor];
if (component == 0)
{
[pickerLabel setText:@"Total"];
pickerLabel.frame = CGRectMake(0.0, 200,220,44);
pickerLabel.textColor = [UIColor colorWithRed:0.0745 green:0.357 blue:1.0 alpha:1];
}
else
{
pickerLabel = [[UILabel alloc] init];
pickerLabel.backgroundColor=[UIColor clearColor];
pickerLabel.frame = CGRectMake(0.0, 200,70,44);
[pickerLabel setText:[pickerArray objectAtIndex:row]];
pickerLabel.textColor = [UIColor blackColor];
}
[pickerLabel setTextAlignment:UITextAlignmentCenter];
pickerLabel.font = [UIFont fontWithName:@"HelveticaNeue-Bold" size:20];
pickerLabel.font = [UIFont boldSystemFontOfSize:20];
//return [pickerLabel autorelease];
return pickerLabel;
}
I am trying to change the selected Picked Value Color from UIPickerView
I am trying to change it but its not effected perfectly its changing other values below the selected value.
回答1:
This is incorrect. You should reload the selected component. Then you need to fetch the selected row and update its color in viewForRow:forComponent:. Something like-
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
//On Selecting the component row
if (component == 0) {
} else if (component == 1) {
[quantityPickerDelegate didChangeLabelText:[pickerArray objectAtIndex:row]];// delegate passing the selected value
[pickerView reloadComponent:component]; //This will cause your viewForComp to hit
}
}
- (UIView *)viewForRow:(NSInteger)row forComponent:(NSInteger)component
{
//...
//Your usual code
pickerLabel.textColor = defaultColor;
if([self.pickerView selectedRowInComponent:component] == row) //this is the selected one, change its color
{
pickerLabel.textColor = [UIColor colorWithRed:0.0745 green:0.357 blue:1.0 alpha:1];
}
}
来源：https://stackoverflow.com/questions/7595220/how-to-change-color-selected-picked-value-from-pickerview