UITableViewCell字幕没有显示

时间:2014-06-10 02:10:41

标签: ios objective-c uitableview

我的UITableView显示从云代码函数返回的JSON信息。出于某种原因,它正确显示了要返回的项目的标题,但我无法将其显示为每个单元格的副标题。将样式设置为UITableViewCellStyleSubtitle似乎不起作用,并向我发出警告,说明Implicit conversion from enumeration type 'enum UITableviewCellStyle' to different enumeration type

MatchCenterViewController.h:

#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
#import "AsyncImageView.h"
#import "SearchViewController.h"

@interface MatchCenterViewController : UIViewController <UITableViewDataSource>

@property (nonatomic) IBOutlet NSString *itemSearch;

@property (nonatomic, strong) NSArray *imageURLs;
@property (strong, nonatomic) NSString *matchingCategoryCondition;
@property (strong, nonatomic) NSString *matchingCategoryLocation;
@property (strong, nonatomic) NSNumber *matchingCategoryMaxPrice;
@property (strong, nonatomic) NSNumber *matchingCategoryMinPrice;


@property (strong, nonatomic) NSArray *matchCenterArray;


@end

MatchCenterViewController.m:

#import "MatchCenterViewController.h"
#import <UIKit/UIKit.h>

@interface MatchCenterViewController () <UITableViewDataSource, UITableViewDelegate>
@property (nonatomic, strong) UITableView *matchCenter;
@end

@implementation MatchCenterViewController



- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
//        self.matchCenter = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
//        _matchCenter.dataSource = self;
//        _matchCenter.delegate = self;
//        [self.view addSubview:self.matchCenter];
    }
    return self;



}




- (void)viewDidLoad
{

    [super viewDidLoad];



    self.matchCenter = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewCellStyleSubtitle];
    self.matchCenter.frame = CGRectMake(0,50,320,self.view.frame.size.height-200);
    _matchCenter.dataSource = self;
    _matchCenter.delegate = self;
    [self.view addSubview:self.matchCenter];

    self.matchCenterArray = [[NSArray alloc] init];



}

- (void)viewDidAppear:(BOOL)animated
{

    self.matchCenterArray = [[NSArray alloc] init];

    [PFCloud callFunctionInBackground:@"MatchCenterTest"
                       withParameters:@{
                                        @"test": @"Hi",
                                        }
                                block:^(NSDictionary *result, NSError *error) {

                                    if (!error) {
                                         self.matchCenterArray = [result objectForKey:@"Top 3"];


                                        dispatch_async(dispatch_get_main_queue(), ^{
                                            [_matchCenter reloadData];
                                        });


                                        NSLog(@"Test Result: '%@'", result);
                                    }
                                }];

    [self.matchCenter registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];


}




- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
     return [self.matchCenterArray count];
}



- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{


    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];


    NSDictionary *matchCenterDictionary= [self.matchCenterArray objectAtIndex:indexPath.row];

    cell.textLabel.text = [matchCenterDictionary objectForKey:@"Title"];// title of the item

    cell.detailTextLabel.text = [matchCenterDictionary objectForKey:@"Price"];// price of the item

    return cell;


}

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




/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end

2 个答案:

答案 0 :(得分:9)

您注册的单元格是默认样式的UITableViewCell,它没有子标题。创建后,您无法更改单元格的样式。

您基本上有两个选择:

创建一个简单的UITableViewCell子类,它使用UITableViewCellStyleSubtitle(或您选择的任何其他样式)

@interface MyTableViewCell : UITableViewCell
@end

@implementation MyTableViewCell
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
    // overwrite style
    self = [super initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:reuseIdentifier];
    return self;
}
@end

...

[self.matchCenter registerClass:[MyTableViewCell class] forCellReuseIdentifier:@"Cell"];

或者返回旧式出列技术,如果没有人可以出列,则创建单元格

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (!cell) {
        // if no cell could be dequeued create a new one
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
    }
    /* configure */
}

如果您这样做,则必须删除registerClass:forCellReuseIdentifier:来电。

我会选择第一个选项,因为很可能很快就会发现内置单元格非常有限,并且您想要添加自己的视图(例如标签,图像视图)。如果您使用子类,则可以使用属性来访问这些视图,而不必使用标记之类的黑客来访问它们。

答案 1 :(得分:0)

在表格视图中,字幕不存在,否则您自定义单元格 使用细节文本标签 cell.detailTextLabel.text = [array objectForKey:@“Value”];

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