Ios 将图像从CellForRowatineXpath获取到DidSelectRowatineXpath，以便在选中行时推送

我正在尝试将图像从选定行推送到详细的viewController。这是我最近试过的。我还尝试从PFImageView获取PFFile，但没有成功

 #import "ExploreViewController.h"
 #import "DetailExploreViewController.h"

 @interface ExploreViewController ()

 @property (strong, nonatomic) PFGeoPoint *userLocation;
 @property (weak, nonatomic) UIImage *imagine; 
 @property (weak, nonatomic) NSString *discovery;

 @end


    - (PFQuery *) queryForTable
{
    if (!self.userLocation) {
        return nil;
    }

    PFQuery *query = [PFQuery queryWithClassName:@"HomePopulation"];
    [query whereKey:@"geopoint" nearGeoPoint:self.userLocation withinKilometers:15];
    query.limit = 25;

    //[self getLocation];

    return query;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
    static NSString *simpleIdentifier = @"ExploreCell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleIdentifier];
    }

    cell.textLabel.text = [object objectForKey:@"discovery"];


    PFFile *getImage = [object objectForKey:@"imageFile"];
    [getImage getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
        if (!error) {
            cell.imageView.image = [UIImage imageWithData:data];

            NSLog(@"hojla: %@", cell.imageView.image);
        } else {
            cell.imageView.image = [UIImage imageNamed:@"1bar.jpg"];
        }
    }];

    return cell;
}

- (void)tableView:(UITableView *)tableViewer didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [self tableView:tableViewer cellForRowAtIndexPath:indexPath];

    self.discovery = cell.textLabel.text;
    NSLog(@"the text: %@", self.discovery);

    self.imagine = cell.imageView.image;

    NSLog(@"ajde: %@", self.imagine);

}


- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"toDetail"]) {
        DetailExploreViewController *destViewController = segue.destinationViewController;
        destViewController.theImage = self.imagine;
        destViewController.theString = self.discovery;
    }
}

DetailExploreViewController.h

#import <UIKit/UIKit.h>

@interface DetailExploreViewController : UIViewController
@property (strong, nonatomic) NSString *theString;
@property (strong, nonatomic) UIImage *theImage;

@end

---

在您的

单元格中，您正在创建一个新的
UIImageView
以包含图像，但不使用它。获得图像后，您可以将其分配给单元格的
imageView.image
属性-

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
    {
        static NSString *simpleIdentifier = @"ExploreCell";

        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleIdentifier];
        if (cell == nil) {
            cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleIdentifier];
        }

        cell.textLabel.text = [object objectForKey:@"discovery"];

        PFFile *getImage = [object objectForKey:@"imageFile"];
        [getImage getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
            if (!error) {
                cell.imageView.image = [UIImage imageWithData:data];
                NSLog(@"hojla: %@", cell.imageView.image);
            }
            else {
               //TODO - Put some placeholder/"not found" image into cell.imageView.image
            }
        }];

        return cell;
    }

然后，在您的
中选择rowatindexpath
-

- (void)tableView:(UITableView *)tableViewer didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableViewer cellForRowAtIndexPath:indexPath];

    UILabel *label = cell.textLabel
    NSLog(@"the text: %@", label.text);

    UIImageView *img = cell.imageView;

    NSLog(@"ajde: %@", img.image);

}

尝试向详细信息控制器发送消息，而不是使用点语法，如下所示：

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"toDetail"]) {
        DetailExploreViewController *destViewController = segue.destinationViewController;
        [destViewController setTheImage:self.theImage];
        [destViewController setTheString:self.theString];
    }
}

在细节控制器实现文件中，我将在
视图中设置细节视图图像，改为显示
方法，如下所示：

-(void)viewWillAppear:(BOOL)animated{

    theLabel.text = theString;
    theImageView.image = theImage;

}

这对我来说很有用。
多亏@Paulw11的建议，我做到了这样：

ExploreViewController.m

#import "DetailExploreViewController.h"

@interface DetailExploreViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *theImageView;
@property (weak, nonatomic) IBOutlet UILabel *theLabel;

@end

@implementation DetailExploreViewController

@synthesize theString, theLabel, theImageView, theImage;


- (void)viewDidLoad
{
    [super viewDidLoad];

    theLabel.text = theString;
    theImageView.image = theImage;

}

- (PFQuery *) queryForTable {
    if (!self.userLocation) {
        return nil;
    }     
    PFQuery *query = [PFQuery queryWithClassName:@"HomePopulation"];
    [query whereKey:@"geopoint" nearGeoPoint:self.userLocation withinKilometers:15];

    query.limit = 25;

    // Calling getData to populate the array at the same time as the tableView is being loaded
    [self getData];
    return query;

}

//Retrieving objects from Parse and adding them in a NSMutableArray
- (void)getData { 
    PFQuery *query = [PFQuery queryWithClassName:@"HomePopulation"];
    [query whereKey:@"geopoint" nearGeoPoint:self.userLocation withinKilometers:15];
    [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
        if (!error) {
            for (PFObject *object in objects) {
                Detailish *detail = [Detailish new]; // Detailish is a class for the array objects
                detail.discovery = [object objectForKey:@"discovery"];
                PFFile *getImage = [object objectForKey:@"imageFile"];
                [getImage getDataInBackgroundWithBlock:^(NSData *data, NSError *error) {
                    if (!error) {
                        detail.imagine = [UIImage imageWithData:data];
                        NSLog(@"Detail imagine: %@", detail.imagine);
                    }
                }];
                detail.location = [object objectForKey:@"location"];

                [forDetail addObject:detail];
            }
        }
    }];

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject
*)object {
    static NSString *simpleIdentifier = @"ExploreCell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:simpleIdentifier];
    }

    cell.textLabel.text = [object objectForKey:@"discovery"];


    return cell; }


- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"toDetail"]) {
        DetailExploreViewController *destViewController = segue.destinationViewController;
        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
        NSLog(@"Halo ej: %@", [forDetail objectAtIndex:indexPath.row]);
        destViewController.hump = [forDetail objectAtIndex:indexPath.row]; 

        Detailish *details = [forDetail objectAtIndex:indexPath.row];
        NSLog(@"discovery: %@", details.discovery);
        NSLog(@"image: %@", details.imagine);
    } }

DetailExploreViewController.h
#import <UIKit/UIKit.h>
#import "Detailish.h"

@interface DetailExploreViewController : UIViewController

@property (strong, nonatomic) Detailish *hump;

@end

DetailExploreViewController.m
#import "DetailExploreViewController.h"

@interface DetailExploreViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *theImageView;
@property (weak, nonatomic) IBOutlet UILabel *theLabel;

@end

@implementation DetailExploreViewController

@synthesize theLabel, theImageView;


- (void) viewWillAppear:(BOOL)animated
{
    theLabel.text = self.hump.discovery;
    theImageView.image = self.hump.imagine;
}

Detailish.h
#import <Foundation/Foundation.h>

@interface Detailish : NSObject

@property (strong, nonatomic) NSString *discovery;
@property (strong, nonatomic) NSString *location;
@property (strong, nonatomic) UIImage *imagine;

@end

Detailish.m
#import "Detailish.h"

@implementation Detailish

@synthesize discovery, location, imagine;

@end

-（PFQuery*）queryForTable{
如果（！self.userLocation）{
返回零；
}     
PFQuery*query=[PFQuery queryWithClassName:@“家庭人口”]；
[query whereKey:@“geopoint”nearGeoPoint:self.userLocation with Inkilometers:15]；
query.limit=25；
//在加载tableView的同时调用getData填充数组
[自我获取数据]；
返回查询；
}
//从Parse中检索对象并将其添加到NSMutableArray中
-（void）getData{
PFQuery*query=[PFQuery queryWithClassName:@“家庭人口”]；
[query whereKey:@“geopoint”nearGeoPoint:self.userLocation with Inkilometers:15]；
[查询findObjectsInBackgroundWithBlock:^（NSArray*对象，NSError*错误）{
如果（！错误）{
用于（PFObject*对象中的对象）{
Detailish*detail=[Detailish new]；//Detailish是数组对象的一个类
detail.discovery=[objectobjectforkey:@“discovery”]；
PFFile*getImage=[objectobjectforkey:@“imageFile”]；
[getImage getDataInBackgroundWithBlock:^（NSData*数据，NSError*错误）{
如果（！错误）{
detail.image=[UIImage-imageWithData:data]；
NSLog（@“细节想象：%@”，细节。想象）；
}
}];
detail.location=[objectobjectforkey:@“location”]；
[fordetailaddobject:detail]；
}
}
}];
}
-（UITableViewCell*）tableView:（UITableView*）tableView cellForRowAtIndexPath:（NSIndexPath*）indexPath对象：（PFObject）
*)反对{
静态NSString*simpleIdentifier=@“ExploreCell”；
UITableViewCell*单元格=[tableView dequeueReusableCellWithIdentifier:simpleIdentifier]；
如果（单元格==nil）{
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle重用标识符：simpleIdentifier]；
}
cell.textLabel.text=[object objectForKey:@“发现”]；
返回单元格；}
-（void）prepareForSegue:（UIStoryboardSegue*）segue发送方：（id）发送方{
if（[segue.identifier IsequalString:@“toDetail”]）{
DetailExploreViewController*destViewController=segue.destinationViewController；
NSIndexPath*indexPath=[self.tableView indexPathForSelectedRow]；
NSLog（@“Halo ej:%@，[forDetail objectAtIndex:indexath.row]）；
destViewController.hump=[forDetailObjectatindex:indexPath.row]；
Detailish*details=[forDetailObjectatindex:indexath.row]；
NSLog（@“discovery:%@”，details.discovery）；
NSLog（@“image:%@”，details.imagine）；
} }
DetailExploreViewController.h
#进口
#导入“Detailish.h”
@接口详细信息ExploreViewController:UIViewController
@性质（强的，非原子的）详细*驼峰；
@结束
DetailExploreViewController.m
#导入“DetailExploreViewController.h”
@接口详细信息ExploreViewController（）
@属性（弱、非原子）IBUIImageView*图像视图；
@属性（弱，非原子）IBUILabel*标签；
@结束
@实现详细信息ExploreViewController
@综合标签、图像视图；
-（无效）视图将显示：（BOOL）动画
{
label.text=self.hump.discovery；
theImageView.image=self.hump.imagine；
}
详细说明
#进口
@接口详细信息：NSObject
@属性（强，非原子）NSString*发现；
@属性（强，非原子）NSString*位置；
@属性（强，非原子）UIImage*imagine；
@结束
Detailish.m
#导入“Detailish.h”
@实现细节
@综合发现、定位、想象；
@结束
感谢您的快速回复。不幸的是，这只是将图像设置为我点击的任何单元格上的单元格。我需要从此单元格中获取图像。imageView，以便将其推送到我的DetailViewController中显示。您是否询问如何将检索到的图像发送到您的DetailViewController？是的，这正是我需要的。您的详细视图是如何显示的？你在导航控制器里推它吗？使用故事板/序列图像？看起来还可以。您所缺少的只是[self-PerformsgueWithIdentifier:@“toDetail”]；在didselectindexpath中。此外，在ViewWillDisplay中访问属性可能比在viewDidLoad中访问属性更好