有谁知道如何更改行(或行背景)从iPhone SDK的UIPickerView控制颜色的?类似于下面的行标题,但我也想改变行的颜色:UIPickerView行颜色
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
谢谢。
有谁知道如何更改行(或行背景)从iPhone SDK的UIPickerView控制颜色的?类似于下面的行标题,但我也想改变行的颜色:UIPickerView行颜色
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
谢谢。
您可以在代理的-pickerView返回一个任意的观点:viewForRow:forComponent:reusingView:方法,记录here。
感谢诺亚,这正是我需要的。我想在这里添加代码,以防别人需要(或希望在:)
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view {
CGRect imageFrame = CGRectMake(0.0, 0.0, 15, 15);
UIImageView *label = [[[UIImageView alloc] initWithFrame:imageFrame] **autorelease**];
if (row == 0)
{
label.backgroundColor = [UIColor redColor];
}
if (row == 1)
{
label.backgroundColor = [UIColor blueColor];
}
if (row == 2)
{
label.backgroundColor = [UIColor blackColor];
}
return label;
}
评论做到这一点:
label.backgroundColor = [UIColor yourcolorColor];
我实现了基于肖恩的回答如下:
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
CGRect rowFrame = CGRectMake(00.0f, 0.0f, [pickerView viewForRow:row forComponent:component].frame.size.width, [pickerView viewForRow:row forComponent:component].frame.size.height);
UILabel *label = [[UILabel alloc] initWithFrame:rowFrame];
label.font = [UIFont boldSystemFontOfSize:18.0f];
// This is an array I pass to the picker in prepareForSegue:sender:
label.text = [self.values objectAtIndex:row];
label.textAlignment = UITextAlignmentCenter;
// This is an array I pass to the picker in prepareForSegue:sender:
if ([self.backgroundColors count]) {
label.backgroundColor = [self.backgroundColors objectAtIndex:row];
// self.lightColors is an array I instantiate in viewDidLoad: self.lightColors = @[ [UIColor yellowColor], [UIColor greenColor], [UIColor whiteColor] ];
label.textColor = [self.lightColors containsObject:label.backgroundColor] ? [UIColor blackColor] : [UIColor whiteColor];
} else {
label.textColor = [UIColor blackColor];
}
return label;
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
UILabel *labelSelected = (UILabel*)[pickerView viewForRow:row forComponent:component];
[labelSelected setTextColor:[UIColor redColor]];
}
而且
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{
UILabel *label = (id)view;
if (!label){
label=[[UILabel alloc]init];
label.textAlignment = NSTextAlignmentCenter;
pickerView.backgroundColor=[UIColor whiteColor];
label.text=[self pickerView:pickerView titleForRow:row forComponent:component];
label.textColor=[UIColor grayColor];
}
return label;
}
不应该使用`reusingView`参数吗?它类似于UITableView的重用池... – 2009-03-29 17:04:22