ios - UIDatePicker 自定义

Question

我已将 UIDatePicker 自定义到一个级别，并将其添加到 UIAlertView。

但是我在日期选择器的底部和顶部出现了黑色，如何去除它。我希望日期选择器整洁干净。

我用来实现这个的代码:

UIDatePicker *datePicker = [[UIDatePicker alloc] init];
datePicker.frame=CGRectMake(20, 45.0, 240.0, 150.0);
datePicker.minimumDate=[NSDate date];

//Forget about this logic.

NSString *alertTitleString=@"";
if(self.presentingViewController !=nil)
{
    alertTitleString=@"Select Date and Time";
    [datePicker setDatePickerMode:UIDatePickerModeDateAndTime];
}
else
{
    alertTitleString=@"Select Time";
    [datePicker setDatePickerMode:UIDatePickerModeTime];

}
[datePicker setDate:[NSDate date]];

UIView *view = [[datePicker subviews] objectAtIndex:0];
[view setBackgroundColor:[UIColor clearColor]]; // hide the first and the last subviews
[[[view subviews] objectAtIndex:0] setHidden:YES];
[[[view subviews] lastObject] setHidden:YES];



 UIAlertView *eventStartDateAlert = [[UIAlertView alloc] initWithTitle:alertTitleString message:@"\n\n\n\n\n\n\n\n" delegate:self cancelButtonTitle:NSLocalizedString(@"OK", @"Ok") otherButtonTitles:nil];
eventStartDateAlert.delegate = self;
[eventStartDateAlert addSubview:datePicker];
[eventStartDateAlert show];

Answer 1

基本上您想要做的是移除顶部和底部的渐变，对吧？

这将起作用，至少对于 iOS 5 和 6。

[view.subviews[5]  setHidden:YES];
[view.subviews[11] setHidden:YES];
[view.subviews[17] setHidden:YES];