ios - 将推送 segue 添加到 tableview 的自定义单元格内的按钮

Question

我有一个项目，它显示与其他社交网络类似的状态提要。每个提要项目都有多个按钮，可以执行不同的操作。其中 1 个按钮会打开一个新的 View Controller ，其中显示已发布在特定状态上的评论。当单击此按钮并打开 View Controller 时，我希望它是一个推送 segue，以便它们是一个后退按钮，用户可以导航回提要。

单击此按钮并启动新的 vc 时，需要将有关被单击的特定状态/单元格的一些唯一数据发送到“comments vc”。执行此操作的代码将放在哪里？

自定义单元格.H

#import <UIKit/UIKit.h>

@interface FeedItemCell : UITableViewCell
@property (weak, nonatomic) IBOutlet UIImageView *DefaultImg;
@property (weak, nonatomic) IBOutlet UILabel *NameLabel;
@property (weak, nonatomic) IBOutlet UILabel *StatusLabel;
@property (weak, nonatomic) IBOutlet UILabel *timeLabel;


@property (nonatomic, copy) NSString *msg_id;
@property (nonatomic, copy) NSString *status;
@property (nonatomic, weak) IBOutlet UIButton* commentButton;
@property (nonatomic, weak) IBOutlet UIButton* bumpButton;
@property (strong, nonatomic) id delegate;
-(IBAction)viewComments:(id)sender;
-(IBAction)bump:(id)sender;

@end


@protocol CustomCellProtocol <NSObject>
- (void)EBCellPressed:(NSString *)cellName;

自定义单元格.M

#import "FeedItemCell.h"
#import "CommentsViewController.h"
#import "NSDate+TimeAgo.h"


@interface FeedItemCell() <WYPopoverControllerDelegate>
{


}
- (IBAction)open:(id)sender;
- (void)close:(id)sender;
@end


@implementation FeedItemCell
@synthesize commentButton;
- (instancetype)initWithDelegate:(id)delegate {
    self = [super init];
    if (self) {
        self.delegate = delegate;
        // Initialization code
    }
    return self;
}

-(IBAction)bump:(id)sender{

    [self.delegate EBCellPressed:@"NAME"];



}

- (IBAction)open:(id)sender
{

}








@end

公共(public)供稿。中号

#import "PublicFeedViewController.h"
#import "FeedItemCell.h"
#import "AFNetworking.h"
#import "UIImageView+WebCache.h"
#import "InboxDetailViewController.h"
#import "SWRevealViewController.h"
#import "CommentsViewController.h"
#import "NSDate+TimeAgo.h"


@interface PublicFeedViewController (){
    NSArray *NameLabel;
    NSArray *StatusLabel;
    NSMutableArray *feedArray;
}

@end

@implementation PublicFeedViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    //The below code prompts the user for push notifications. If allowed, code in AppDelegate takes over and stores the token.
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];
    // Do any additional setup after loading the view.
    self.FeedTable.dataSource=self;
    self.FeedTable.delegate=self;

    // Set the side bar button action. When it's tapped, it'll show up the sidebar.
    _sidebarButton.target = self.revealViewController;
    _sidebarButton.action = @selector(revealToggle:);

    // Set the gesture
    [self.view addGestureRecognizer:self.revealViewController.panGestureRecognizer];
    AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
    NSDictionary *parameters = @{@"foo": @"bar"};
    [UIApplication sharedApplication].networkActivityIndicatorVisible = TRUE;
    [manager POST:@"www" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
        //NSLog(@"JSON: %@", responseObject);

        self->feedArray = [responseObject objectForKey:@"feed"];

        [self.FeedTable reloadData];
        [UIApplication sharedApplication].networkActivityIndicatorVisible = FALSE;
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];


}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return feedArray.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{


    NSString *CellIdentifier=@"Cell";

    FeedItemCell *Cell=[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if(!Cell){
        Cell = [[FeedItemCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

    }


    NSLog(@"FEED ARRAY: %@", self->feedArray);
    NSDictionary *tempDictionary= [self->feedArray objectAtIndex:indexPath.row];
    // Display recipe in the table cell
    NSString *thumb_img = [tempDictionary objectForKey:@"thumb_img"];
    NSString *thumb_path=@"http://buhzhyve.com/CI_REST_LOGIN/UPLOADS/thumbs/";
    NSString *thumb_url = [thumb_path stringByAppendingString:thumb_img];



    Cell.NameLabel.text=[tempDictionary objectForKey:@"first_name"];
    Cell.StatusLabel.text=[tempDictionary objectForKey:@"message"];
    Cell.msg_id=[tempDictionary objectForKey:@"msg_id"];
    //Cell.status=[tempDictionary objectForKey:@"message"];
    Cell.StatusLabel.lineBreakMode=0;
    Cell.StatusLabel.numberOfLines=0;
    NSString *commentCount = [tempDictionary objectForKey:@"comment_count"];
    NSString *commentButtonText =[NSString stringWithFormat:@"Comments ( %@ )",commentCount];
    [Cell.commentButton setTitle:commentButtonText  forState: UIControlStateNormal];
    NSString *bumpCount = [tempDictionary objectForKey:@"bump_count"];
    NSString *bumpButtonText =[NSString stringWithFormat:@"Bumps ( %@ )",bumpCount];
    [Cell.bumpButton setTitle:bumpButtonText  forState: UIControlStateNormal];
    //[Cell.StatusLabel sizeToFit];
    NSString *created_string=[tempDictionary objectForKey:@"created"];
    double created_double = created_string.doubleValue;
    NSDate *date = [[NSDate alloc] initWithTimeIntervalSince1970:created_double];
    NSString *ago = [date timeAgo];
    Cell.timeLabel.text=ago;




    //Cell.DefaultImg.image = [UIImage imageNamed:@"buhz_mini_logo.png"];

    [Cell.DefaultImg setImageWithURL:[NSURL URLWithString:thumb_url]
                    placeholderImage:[UIImage imageNamed:@"buhz_mini_logo.png"]];
    return Cell;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //Ideally you should do lazy loading so that instead of creating a new textView each time, you just reuse the same one.
    UITextView *temp = [[UITextView alloc] initWithFrame:CGRectMake(82, 26, self.FeedTable.frame.size.width, 18)]; //This initial size doesn't matter
    NSDictionary *tempDictionary= [self->feedArray objectAtIndex:indexPath.row];
    NSString *status = [tempDictionary objectForKey:@"message"];
    temp.font =[UIFont fontWithName:@"System" size:12];
    temp.text = status;


    CGFloat textViewWidth = 218;
    CGRect tempFrame = CGRectMake(82,26,textViewWidth,18); //The height of this frame doesn't matter.
    CGSize tvsize = [temp sizeThatFits:CGSizeMake(tempFrame.size.width, tempFrame.size.height)]; //This calculates the necessary size so that all the text fits in the necessary width.

    //Add the height of the other UI elements inside your cell

    return tvsize.height + 70;


}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"commentSegue"]) {

    }
}

@end

公共(public)提要.h

#import <UIKit/UIKit.h>

@interface PublicFeedViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>
@property (weak, nonatomic) IBOutlet UITableView *FeedTable;
@property (weak, nonatomic) IBOutlet UIBarButtonItem *sidebarButton;
- (IBAction)addItem;



@end

Answer 1

假设您在代码中创建此按钮，这就是您可以处理的方式。

第一行告诉按钮，当它被按下时，它需要调用这个作为 Action 发送的特定选择器/方法。

[button addTarget:self action:@selector(showNextViewController) forControlEvents:UIControlEventTouchUpInside]; 

然后您将在同一个类中创建此方法。

- (void) showNextViewController
{
    NewViewController *newViewController = [[NewViewController alloc] init];  //Edit this line of course to fit for your situation.  I'm not sure if you're loading from an XIB or from a Storyboard, or neither.
    newViewController.someVariable = someVariable;
    newViewController.someOtherVariable = someOtherVariable;

    [[[[[UIApplication sharedApplication] delegate] window] rootViewController].navigationController pushViewController:view animated:YES];
}

这会将必要的数据发送到新的 View Controller ，它还会在屏幕上显示带有后退按钮的新 View 。

希望这能奏效!