UIPickerView自定义选中的字体颜色、字号、字体
在使用UIPickerView显示时间,城市等的选择时,系统定义的样式总是与自己的页面不搭配需要进行精加工,就给大家介绍一下怎样自定义UIPickerView选中的字体颜色、字号、字体等属性
自定义UIPickerView选中的字体颜色、字号、字体等属性时需要定义
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(nullable UIView *)view __TVOS_PROHIBITED;方法在此方法中 根据需要 重写下面的两个方法
//重写 - (nullable NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component __TVOS_PROHIBITED; 方法加载title
/*重写- (nullable NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED; 方法加载 attributedText*/
具体看实例:(实例以加载三级城市选择为例)
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{ //设置分割线的颜色 for(UIView *singleLine in pickerView.subviews) { if (singleLine.frame.size.height < 1) { singleLine.backgroundColor = [UIColor grayColor]; } } /*重新定义row 的UILabel*/ UILabel *pickerLabel = (UILabel*)view; if (!pickerLabel){ pickerLabel = [[UILabel alloc] init]; // Setup label properties - frame, font, colors etc //adjustsFontSizeToFitWidth property to YES [pickerLabel setTextColor:[UIColor darkGrayColor]]; pickerLabel.adjustsFontSizeToFitWidth = YES; [pickerLabel setTextAlignment:NSTextAlignmentCenter]; [pickerLabel setBackgroundColor:[UIColor clearColor]]; [pickerLabel setFont:[UIFont systemFontOfSize:16.0f]]; // [pickerLabel setFont:[UIFont boldSystemFontOfSize:16.0f]]; } // Fill the label text here //重写 - (nullable NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component __TVOS_PROHIBITED; 方法加载title //pickerLabel.text = [self pickerView:pickerView titleForRow:row forComponent:component]; if(component == 0){ if(row == _firstIndex){ /*选中后的row的字体颜色*/ /*重写- (nullable NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED; 方法加载 attributedText*/ pickerLabel.attributedText = [self pickerView:pickerView attributedTitleForRow:_firstIndex forComponent:component]; }else{ pickerLabel.text = [self pickerView:pickerView titleForRow:row forComponent:component]; } }else if (component == 1){ if(row == _secondIndex){ pickerLabel.attributedText = [self pickerView:pickerView attributedTitleForRow:_secondIndex forComponent:component]; }else{ pickerLabel.text = [self pickerView:pickerView titleForRow:row forComponent:component]; } }else if (component == 2){ if(row == _thirdIndex){ pickerLabel.attributedText = [self pickerView:pickerView attributedTitleForRow:_thirdIndex forComponent:component]; }else{ pickerLabel.text = [self pickerView:pickerView titleForRow:row forComponent:component]; } } return pickerLabel; } - (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component{ NSString *titleString; if (component == 0) { CityModel *md = _dataSource[row]; titleString = md.region_name; } else if (component == 1){ CityModel *md = _dataSource[_firstIndex]; _shiArr = md.regionlist; CityModel *shi = _shiArr[row]; titleString = shi.region_name; } else if (component == 2){ CityModel *md = _shiArr[_secondIndex]; _quArr = md.regionlist; CityModel *qu = _quArr[row]; titleString = qu.region_name; } NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithString:titleString]; NSRange range = [titleString rangeOfString:titleString]; [attributedString addAttribute:NSForegroundColorAttributeName value:navBGColor range:range]; return attributedString; } - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ if (component == 0) { CityModel *md = _dataSource[row]; return md.region_name; } else if (component == 1){ CityModel *md = _dataSource[_firstIndex]; _shiArr = md.regionlist; CityModel *shi = _shiArr[row]; return shi.region_name; } else if (component == 2){ CityModel *md = _shiArr[_secondIndex]; _quArr = md.regionlist; CityModel *qu = _quArr[row]; return qu.region_name; } return nil; }
效果如下图:
同时可以根据以上的思路进行自定义你需要的样式,谁有更好的方法我们可以共同学习哦!(关注博客:http://www.cnblogs.com/Rong-Shengcom/)