IOS/Objective-C/Storyboard:检测正在播放的节目片段

您可以为启动进度条定义一个公共方法,并从第一个VC调用它。

在 FirstVC.m :

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // set segu identifier to SecondVC in StoryBoard        
    if ([segue.identifier isEqualToString:@"SecondVC"]) {
            SecondVC *secondVC = (SecondVC *)segue.destinationViewController;
            [secondVC fireProgressBar];
    }
}

在 SecondVC.h

#import <UIKit/UIKit.h>

@interface SecondVC : UIViewController
  -(void)fireProgressBar;
@end

在 SecondVC.m :

#import "SecondVC.h"

@implementation SecondVC

- (void)viewDidLoad {
    [super viewDidLoad];
}

-(void)fireProgressBar {
    NSLog(@"Progress Bar Fired!!!");
}

@end