我的Parse云代码将JSON数据返回到我的iOS应用程序,我想将UITableView
的部分标题设置为它返回的Search Term
属性。我已尝试引用matchCenterDictionary
以便专门选择该密钥,但它只显示(null)
作为节标题。
在设置单元格的文本标签时,以这种方式引用字典工作得非常好,所以我不确定为什么它不能用于此目的。
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;
@property (strong, nonatomic) NSDictionary *matchCenterDictionary;
@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) {
}
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:@"MatchCenter"
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);
}
}];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
//the part where i setup sections and the deleting of said sections
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return 21.0f;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 21)];
headerView.backgroundColor = [UIColor lightGrayColor];
NSString *searchTerm = [_matchCenterDictionary objectForKey:@"Search Term"];
UILabel *headerLabel = [[UILabel alloc] initWithFrame:CGRectMake(8, 0, 250, 21)];
headerLabel.text = [NSString stringWithFormat:@"%@", searchTerm];
headerLabel.font = [UIFont boldSystemFontOfSize:[UIFont systemFontSize]];
headerLabel.textColor = [UIColor whiteColor];
headerLabel.backgroundColor = [UIColor lightGrayColor];
[headerView addSubview:headerLabel];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.tag = section + 1000;
button.frame = CGRectMake(300, 2, 17, 17);
[button setImage:[UIImage imageNamed:@"31-circle-x"] forState:UIControlStateNormal];
[button addTarget:self action:@selector(deleteButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
[headerView addSubview:button];
return headerView;
}
- (IBAction)deleteButtonPressed:(UIButton *)sender {
// NSInteger section = sender.tag - 1000;
// [self.objects removeObjectAtIndex:section];
// [self.tableView deleteSections:[NSIndexSet indexSetWithIndex:section] withRowAnimation:UITableViewRowAnimationAutomatic];
//
// // reload sections to get the new titles and tags
// NSInteger sectionCount = [self.objects count];
// NSIndexSet *indexes = [NSMutableIndexSet indexSetWithIndexesInRange:NSMakeRange(0, sectionCount)];
// [self.tableView reloadSections:indexes withRowAnimation:UITableViewRowAnimationNone];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.matchCenterArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Initialize cell
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];
}
// populate dictionary with results
NSDictionary *matchCenterDictionary= [self.matchCenterArray objectAtIndex:indexPath.row];
// title of the item
cell.textLabel.text = [matchCenterDictionary objectForKey:@"Title"];
cell.textLabel.font = [UIFont boldSystemFontOfSize:12];
// price of the item
cell.detailTextLabel.text = [NSString stringWithFormat:@"$%@", [matchCenterDictionary objectForKey:@"Price"]];
cell.detailTextLabel.textColor = [UIColor colorWithRed:0/255.0f green:127/255.0f blue:31/255.0f alpha:1.0f];
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:[matchCenterDictionary objectForKey:@"Image URL"]]];
[[cell imageView] setImage:[UIImage imageWithData:imageData]];
return cell;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - 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
返回JSON:
{
"Top 3" = (
{
"Image URL" = "http://thumbs4.ebaystatic.com/m/maPdKVZiQtK7oHcR-PY81sg/140.jpg";
"Item URL" = "http://www.ebay.com/itm/Samsung-Galaxy-S5-SM-G900P-16GB-Black-Sprint-Brand-New-s5-LTE-ESN-BAD-/261503613519?pt=Cell_Phones";
Price = "390.0";
"Search Term" = "moto x 16gb";
Title = "Samsung Galaxy S5 SM-G900P 16GB Black (Sprint) Brand New s5 LTE *ESN BAD*";
},
{
"Image URL" = "http://thumbs4.ebaystatic.com/m/mkF9PJ_sT3_yGR_3AVM8TAA/140.jpg";
"Item URL" = "http://www.ebay.com/itm/HDC-Galaxy-S5-SM-G900-Unlocked-Smartphone-White-16-GB-GSM-WCDMA-1-7GHz-Octa-Core-/281356592227?pt=Cell_Phones";
Price = "279.99";
"Search Term" = "moto x 16gb";
Title = "HDC Galaxy S5 SM-G900 Unlocked Smartphone White 16 GB GSM WCDMA 1.7GHz Octa Core";
},
{
"Image URL" = "http://thumbs1.ebaystatic.com/m/mkwGBy79W6XidMm0ZALMthw/140.jpg";
"Item URL" = "http://www.ebay.com/itm/SAMSUNG-GALAXY-S5-SM-G900P-16GB-sprint-READ-DESCRIPTION-/141313501036?pt=Cell_Phones";
Price = "379.0";
"Search Term" = "moto x 16gb";
Title = "SAMSUNG GALAXY S5 SM-G900P - 16GB (sprint)- READ DESCRIPTION !!!";
}
);
}
答案 0 :(得分:1)
您应该使用self.matchCenterArray而不是_matchCenterDictionary
您必须这样做的方法是解析数据。
NSString *searchTerm = [[self.matchCenterArray objectAtIndex:section] objectForKey:@"Search Term"];
答案 1 :(得分:1)
按照Adrian的说明(使用self.matchCenterArray)。
然后改变这个:
NSString *searchTerm = [self.matchCenterArray objectForKey:@"Search Term"];
,例如:
NSString *searchTerm = [[self.matchCenterArray firstObject] objectForKey:@"Search Term"];
搜索词位于数组中的每个NSDictionary中。因此您需要首先检索firstObject。