ShowViewController在PopViewController拿值。注意设置代理（委托）？就像，我没有委拖你替我办事，你去银行，或者去政府替我办事，人家当然不会处理你
（1）PopViewController.h
#import <UIKit/UIKit.h>
//定义协议
@protocol popNextDeleage <NSObject]]]]>
-(void)passPopReport:(NSString*)string;
@end
@interface PopViewController : UIViewController
@property(nonatomic,retain)NSObject <popNextDeleage>*popDeleage;//声明一个代理
- (IBAction)reportAction:(UIButton *)sender;
@end
（2）PopViewController.m
- (IBAction)reportAction:(UIButton *)sender
{
[self.popDeleage passPopReport:@"举报"];//赋值
}
（3）ShowViewController.h遵守协议popNextDeleage
@interface ShowViewController : UIViewController<iCarouselDataSource,iCarouselDelegate,UIScrollViewDelegate,UITableViewDataSource,UITableViewDelegate,popNextDeleage>{
UIView *moreView;
}
（4）ShowViewController.m
//实现协议（拿到值）
-(void)passPopReport:(NSString *)string{
if ([string isEqualToString:@"举报"])
{
ReportViewController *report = [[ReportViewController alloc] init];
[self.navigationController pushViewController:report animated:YES];
}
}
（5）ShowViewController.m设置deleage
-(void)pop:(id)sender{
PopViewController *pop = [[PopViewController alloc] init];
pop.popDeleage = self;//设置deleage（谁实现了delegate方法就指定给谁）
FPPopoverController *basePop = [[FPPopoverController alloc] initWithViewController:pop];
basePop.tint = FPPopoverLightGrayTint;
basePop.arrowDirection = FPPopoverArrowDirectionAny;
[basePop presentPopoverFromView:sender];
}