我的UITableView显示了从云代码函数返回的JSON信息。由于某种原因,它可以正确显示要退回的商品的标题,但是我无法将价格显示为每个单元格的字幕。将样式设置为UITableViewCellStyleSubtitle
似乎不起作用,并给了我警告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
您注册的单元格是默认样式的UITableViewCell,它没有子标题。创建单元格后,您将无法更改其样式。
您基本上有两个选择:
创建一个简单的UITableViewCell子类,该子类使用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"];
或者返回到旧式出队技术,如果无法出队,则在其中创建单元
- (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 */
}
如果这样做,则必须删除registerClass:forCellReuseIdentifier:
呼叫。
我会选择第一种方法,因为很可能很快您就会发现内置单元格非常有限,并且您想添加自己的视图(例如标签,图像视图)。而且,如果您使用子类,则可以使用属性来访问这些视图,而不必使用诸如标记之类的技巧来访问它们。
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