ShowViewController在PopViewController拿值。注意設置代理（委托）？就像，我沒有委拖你替我辦事，你去銀行，或者去政府替我辦事，人家當然不會處理你

（1）PopViewController.h
#import

//定義協議
@protocol popNextDeleage

-(void)passPopReport:(NSString*)string;

@end

@interface PopViewController : UIViewController

@property(nonatomic,retain)NSObject *popDeleage;//聲明一個代理

- (IBAction)reportAction:(UIButton *)sender;

@end

（2）PopViewController.m - (IBAction)reportAction:(UIButton *)sender {

[self.popDeleage passPopReport:@"舉報"];//賦值

}

（3）ShowViewController.h遵守協議popNextDeleage
@interface ShowViewController : UIViewController{

UIView *moreView;

}

（4）ShowViewController.m //實現協議（拿到值）
-(void)passPopReport:(NSString *)string{

if ([string isEqualToString:@"舉報"]) {
ReportViewController *report = [[ReportViewController alloc] init];
[self.navigationController pushViewController:report animated:YES];
}
}

（5）ShowViewController.m設置deleage

-(void)pop:(id)sender{

PopViewController *pop = [[PopViewController alloc] init];
pop.popDeleage = self;//設置deleage（誰實現了delegate方法就指定給誰）
FPPopoverController *basePop = [[FPPopoverController alloc] initWithViewController:pop];
basePop.tint = FPPopoverLightGrayTint;
basePop.arrowDirection = FPPopoverArrowDirectionAny;
[basePop presentPopoverFromView:sender];

}