iOS datepicker 和 pickerView 设置字体颜色

// 设置自定义pickerView label颜色
-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view{
UILabel* pickerLabel = (UILabel*)view;
if (!pickerLabel){
pickerLabel = [[UILabel alloc] init];
// Setup label properties - frame, font, colors etc
//adjustsFontSizeToFitWidth property to YES
//        pickerLabel.minimumFontSize = 8.;
//        pickerLabel.adjustsFontSizeToFitWidth = YES;
[pickerLabel setTextAlignment:NSTextAlignmentCenter];
//        [pickerLabel setBackgroundColor:[UIColor clearColor]];
//        [pickerLabel setFont:[UIFont boldSystemFontOfSize:15]];
[pickerLabel setTextColor:kPickerViewTitleColor];
}
// Fill the label text here
pickerLabel.text=[self pickerView:pickerView titleForRow:row forComponent:component];
return pickerLabel;
}

[self.datePicker setValue:kDatePicerTextColor forKey:@"textColor"];

// 默认选中的颜色 为黑色 修改方法如下

//通过NSSelectorFromString获取setHighlightsToday方法

SEL selector= NSSelectorFromString(@"setHighlightsToday:");

//创建NSInvocation

NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDatePicker instanceMethodSignatureForSelector:selector]];

BOOL no = NO;

[invocation setSelector:selector];

//setArgument中第一个参数的类picker，第二个参数是SEL，

[invocation setArgument:&no atIndex:2];

//让invocation执行setHighlightsToday方法

[invocation invokeWithTarget:self.datePicker];