#ios #objective-c #uitableview #uiwebview
#iOS #objective-c #uitableview #uiwebview
Вопрос:
У меня есть UITableView, который заполняется JSON, возвращаемым функцией анализа облачного кода. Каждая ячейка имеет значение «URL элемента», связанное с ней в JSON. Когда пользователь нажимает на ячейку, я хочу, чтобы она переходила к WebViewController и загружала этот URL-адрес в UIWebView.
Я начал настраивать предварительный код для этого, но я не уверен, куда идти дальше.
MatchCenterViewController.h:
#import <UIKit/UIKit.h>
#import <Parse/Parse.h>
#import "AsyncImageView.h"
#import "SearchViewController.h"
#import "WebViewController.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) NSString *searchTerm;
@property (strong, nonatomic) NSURL *itemURL;
@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-100);
_matchCenter.dataSource = self;
_matchCenter.delegate = self;
[self.view addSubview:self.matchCenter];
_matchCenterArray = [[NSArray alloc] init];
}
- (void)viewDidAppear:(BOOL)animated
{
self.matchCenterArray = [[NSArray alloc] init];
[PFCloud callFunctionInBackground:@"MatchCenter"
withParameters:@{
@"test": @"Hi",
}
block:^(NSArray *result, NSError *error) {
if (!error) {
_matchCenterArray = resu<
[_matchCenter reloadData];
NSLog(@"Result: '%@'", result);
}
}];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return _matchCenterArray.count;
}
//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];
_searchTerm = [[[[_matchCenterArray objectAtIndex:section] objectForKey:@"Top 3"] objectAtIndex:3]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 *deleteButton = [UIButton buttonWithType:UIButtonTypeCustom];
deleteButton.tag = section;
deleteButton.frame = CGRectMake(300, 2, 17, 17);
[deleteButton setImage:[UIImage imageNamed:@"xbutton.png"] forState:UIControlStateNormal];
[deleteButton addTarget:self action:@selector(deleteButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
[headerView addSubview:deleteButton];
return headerView;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 3;
}
- (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];
}
// No cell seperators = clean design
tableView.separatorColor = [UIColor clearColor];
// title of the item
cell.textLabel.text = _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row][@"Title"];
cell.textLabel.font = [UIFont boldSystemFontOfSize:14];
// price of the item
cell.detailTextLabel.text = [NSString stringWithFormat:@"$%@", _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row][@"Price"]];
cell.detailTextLabel.textColor = [UIColor colorWithRed:0/255.0f green:127/255.0f blue:31/255.0f alpha:1.0f];
// image of the item
NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:_matchCenterArray[indexPath.section][@"Top 3"][indexPath.row][@"Image URL"]]];
[[cell imageView] setImage:[UIImage imageWithData:imageData]];
return cell;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 65;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
WebViewController *WebViewController = [[WebViewController alloc] initWithNibName:@"WebViewController" bundle:nil];
//And here code for passing URL to WebViewController
NSURL *itemURL = _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row][@"Item URL"];
[self.navigationController pushViewController:WebViewController animated:NO];
}
- (void)deleteButtonPressed:(id)sender
{
// links button
UIButton *deleteButton = (UIButton *)sender;
// Define the sections title
NSString *sectionName = _searchTerm = [[[[_matchCenterArray objectAtIndex:deleteButton.tag] objectForKey:@"Top 3"] objectAtIndex:3]objectForKey:@"Search Term"];
// Run delete function with respective section header as parameter
[PFCloud callFunctionInBackground:@"deleteFromMatchCenter"
withParameters:
@{@"searchTerm": sectionName,}
block:^(NSDictionary *result, NSError *error) {
if (!error) {
[PFCloud callFunctionInBackground:@"MatchCenter"
withParameters:@{
@"test": @"Hi",
}
block:^(NSArray *result, NSError *error) {
if (!error) {
_matchCenterArray = resu<
[_matchCenter reloadData];
NSLog(@"Result: '%@'", result);
}
}];
}
}];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
controller.itemURL = self.itemURL;
}
@end
WebViewController.m:
#import "WebViewController.h"
@interface WebViewController ()
@end
@implementation WebViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
UIWebView *Webview = [[UIWebView alloc]initWithFrame:Frame];
NSString *urlAddress = itemURL;
NSURL *url = [NSURL URLWithString:urlAddress];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
self.myWebView = tempWebview;
[tempWebview loadRequest:requestObj];
[tempWebview release];
myWebView.delegate=self;
}
- (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
Ответ №1:
Сложно ответить с уверенностью, учитывая объем кода и общность вопроса, но наверняка требуется дополнительная работа в `didSelectRowAtIndexPath. Что-то вроде этого:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// lowercase variable name to match convention
WebViewController *webViewController = [[WebViewController alloc] initWithNibName:@"WebViewController" bundle:nil];
NSURL *itemURL = _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row][@"Item URL"];
webViewController.itemURL = itemURL;
[self.navigationController pushViewController:webViewController animated:NO];
}
Затем обязательно объявите NSURL *itemURL свойство в WebViewController.h. Затем в его реализации:
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
NSURLRequest *request = [NSURLRequest requestWithURL:self.itemURL];
[self.webView loadRequest:request];
}
Ответ №2:
Удалите tableView:didSelectRowAtIndexPath: и измените prepareForSegue:sender: , как показано ниже:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
WebViewController *webViewController = segue.destinationViewController;
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSURL *itemURL = _matchCenterArray[indexPath.section][@"Top 3"][indexPath.row][@"Item URL"];
webViewController.itemURL = self.itemURL;
}