如何使用来自其他ViewController的JSON响应填充UITableView? [英] How to populate UITableView with the responce of JSON from a different ViewController?
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问题描述
我在stackoverflow.com上进行了搜索和搜索，但无法摆脱这种情况，如何用GET响应填充TableView.我发送GET并在DetailViewController(我的主控制器)中的方法中解析响应，并希望使用响应的一部分来初始化TableViewCell，并使用另一部分来初始化该单元格的详细信息..我创建了messageTableView和messageDetailViewController ..如果问题不够清楚，我也可以共享代码.谢谢
I googled and searched in stackoverflow.com but couldn't get rid of this situation, how can i populate TableView with the responce of a GET. I send the GET and parse the response in a method in DetailViewController (my main controller) and want to initialize the TableViewCell with a part of the response, and details of that cell with another part.. I created messageTableView and messageDetailViewController.. I can share code too if the question is not clear enough. Thanks
编辑我知道这不是必需的，但是我共享了所有代码，因为我无法在viewControllers之间绑定变量，可以在视图之间导航，但不能在彼此之间共享变量..
EDIT I know this isn't desired but I shared all codes since i can't tie the variables between viewControllers, i can navigate amongst the views but i can't share variables between one another..
这是我的DetailViewController的界面文件(在我的应用中，它是主View Controller)
Here is my DetailViewController's interface file(in my app, it is main View Controller)
#import <UIKit/UIKit.h>
@interface BNT_1DetailViewController : UIViewController <UISplitViewControllerDelegate>
{
NSMutableArray *buttons;
NSString *userName, *password, *serverIP;
NSDictionary *mess;
IBOutlet UITextField *userNameF;
IBOutlet UITextField *passwordF;
IBOutlet UITextField *serverF;
NSURL *url;
NSMutableArray *mesag;
IBOutlet UIButton *acceptButton;
NSMutableArray *mesID; //saving meesage ID s to NSMutableArray
NSMutableArray *content;
}
@property(retain,nonatomic)NSMutableArray *mesID,*content;
@property(assign,nonatomic)NSMutableArray *mesag ;
@property(retain, nonatomic)NSDictionary *mess;
//@property (retain,nonatomic) NSMutableArray *buttons;
@property (retain, nonatomic) UITextField *userNameF;
@property (retain, nonatomic) UITextField *passwordF;
@property (retain, nonatomic) UITextField *serverF;
@property (retain, nonatomic) UIButton *acceptButton;
@property (retain, nonatomic) NSString *userName, *password, *serverIP;
@property (strong, nonatomic) id detailItem;
@property(retain,nonatomic)NSURL *url;
@property (strong, nonatomic) IBOutlet UILabel *detailDescriptionLabel;
-(IBAction)acceptAct:(id)sender;
-(IBAction)readMessages:(id)sender;
-(IBAction)secondAct:(id)sender;
@end
这是其实现文件:
#import "BNT_1DetailViewController.h"
#import "mainMenu.h"
#import "messages.h"
@interface BNT_1DetailViewController ()
@property (strong, nonatomic) UIPopoverController *masterPopoverController;
- (void)configureView;
@end
@implementation BNT_1DetailViewController
@synthesize content,mesID,url;
@synthesize mesag,mess;
@synthesize userNameF, passwordF, serverF, acceptButton;
@synthesize userName, password, serverIP;
@synthesize detailItem = _detailItem;
@synthesize detailDescriptionLabel = _detailDescriptionLabel;
@synthesize masterPopoverController = _masterPopoverController;
-(IBAction)readMessages:(id)sender{
messages *message=[[messages alloc]initWithNibName:@"messages" bundle:nil];
/*
message.mesid=mesID;
message.contents=content;
*/
[self.navigationController pushViewController:message animated:TRUE];
}
-(IBAction)acceptAct:(id)sender{
userName=[[NSString alloc] initWithString:userNameF.text ];
[userNameF setText:userName];
NSUserDefaults *userNameDef= [NSUserDefaults standardUserDefaults];
[userNameDef setObject:userName forKey:@"userNameKey"];
password =[[NSString alloc] initWithString:passwordF.text];
[passwordF setText:password];
NSUserDefaults *passDef=[NSUserDefaults standardUserDefaults];
[passDef setObject:password forKey:@"passwordKey"];
serverIP=[[NSString alloc] initWithString: serverF.text];
[serverF setText:serverIP];
NSUserDefaults *serverDef=[NSUserDefaults standardUserDefaults];
[serverDef setObject:serverIP forKey:@"serverIPKey"];
[userNameDef synchronize];
[serverDef synchronize];
[passDef synchronize];
UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"BNTPRO "
message:@"Your User Informations are going to be sent to server. Do you accept?"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles:@"Cancel", nil];
[message show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSString *title = [alertView buttonTitleAtIndex:buttonIndex];
if([title isEqualToString:@"OK"])
{
if([userNameF.text isEqualToString:@""]|| [passwordF.text isEqualToString:@""] || [serverF.text length]<6)
{
UIAlertView *message1 = [[UIAlertView alloc] initWithTitle:@"BNTPRO "
message:@"Your User Informations are not defined properly!"
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[message1 show];
[userNameF resignFirstResponder];
[passwordF resignFirstResponder];
return;
}
mainMenu *ma=[[mainMenu alloc]initWithNibName:@"mainMenu" bundle:nil];
NSString *str1=[@"?username=" stringByAppendingString:userNameF.text];
NSString *str2=[@"&password=" stringByAppendingString:passwordF.text];
NSString *str3=[str1 stringByAppendingString:str2];
NSString *str4 =[@"http://" stringByAppendingString:serverF.text];
url=[NSURL URLWithString:[str4 stringByAppendingString:[@"/ipad/login.php" stringByAppendingString:str3]]];
//get the url to jsondata
NSData *jSonData=[NSData dataWithContentsOfURL:url];
if (jSonData!=nil) {
NSError *error=nil;
id result=[NSJSONSerialization JSONObjectWithData:jSonData options:
NSJSONReadingMutableContainers error:&error];
NSLog(@"%@",result);
if (error==nil) {
mess=[result objectForKey:@"message"];
NSDictionary *messContent=[mess valueForKeyPath:@"message"];
NSDictionary *messID=[mess valueForKeyPath:@"ID"];
NSString*key1=[ result objectForKey:@"key" ];
NSString *s1=[@"http://" stringByAppendingString:serverF.text];
NSString *s2=[s1 stringByAppendingString:@"/ipad/button.php"];
NSURL *url2=[NSURL URLWithString:[s2 stringByAppendingString:[@"?key=" stringByAppendingString:key1]]];
NSData *data2=[NSData dataWithContentsOfURL:url2];
id result2=[NSJSONSerialization JSONObjectWithData:data2 options:NSJSONReadingMutableContainers error:nil];
mesID = [NSMutableArray array];//saving meesage ID s to NSMutableArray
content = [NSMutableArray array];
for ( mesag in mess) {
//i want to populate TableViewCells with the messID and the details of each cell(push in new view controller) will contain 'content' above
/*
[mesID addObject:[mesag objectForKey:@"ID"]];
[content addObject:[mesag objectForKey:@"message"]];
*/
[[NSUserDefaults standardUserDefaults] setObject:messID forKey:@"message"];
[[NSUserDefaults standardUserDefaults] setObject:messContent forKey:@"messContent"];
// NSLog(@"%@", [[NSUserDefaults standardUserDefaults] dictionaryRepresentation]);
// NSLog(@"The Message with ID %@ is: %@\n",messID,messContent);
}
NSLog(@"MessID: %@",mesID);
NSLog(@"Context: %@",content);
buttons = [NSMutableArray array];
CGFloat yPosition = 60.0f;
CGFloat xPosition = 40.0f;
const CGFloat buttonHeight = 75.0f;
const CGFloat buttonMargin = 50.0f;
UIButton *bt=[UIButton buttonWithType:UIButtonTypeRoundedRect];
[bt setTitle:@"Messages" forState:UIControlStateNormal];
[bt addTarget:self action:@selector(readMessages:) forControlEvents:UIControlEventTouchUpInside];
bt.titleLabel.font=[UIFont systemFontOfSize:25];
bt.frame=CGRectMake(300.0f, 700.0f,180.0f , 70.0f);
[ma.view addSubview:bt];
for(NSDictionary* buttonData in result2) {
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
NSString* buttonTitle = [buttonData objectForKey:@"name"];
NSString* buttonID=[buttonData objectForKey:@"ID"];
[button setTitle:buttonTitle forState:UIControlStateNormal];
[button setTag:[buttonID intValue]];
button.titleLabel.font=[UIFont systemFontOfSize:28];
button.frame = CGRectMake(xPosition, yPosition, 210.0f, buttonHeight);
[button addTarget:self action:@selector(secondAct:) forControlEvents:UIControlEventTouchUpInside];
[ma.view addSubview:button];
// [v.buttons addObject:button];
xPosition = 260.0f;
yPosition+= buttonHeight + buttonMargin;
}
[self.navigationController pushViewController:ma animated:TRUE];
}
}} }
-(IBAction)secondAct:(id)sender{
NSLog(@"ABC: %d",[sender tag]);
}
- (void)dealloc
{
[_detailItem release];
[_detailDescriptionLabel release];
[_masterPopoverController release];
[super dealloc];
}
#pragma mark - Managing the detail item
- (void)setDetailItem:(id)newDetailItem
{
if (_detailItem != newDetailItem) {
[_detailItem release];
_detailItem = [newDetailItem retain];
// Update the view.
[self configureView];
}
if (self.masterPopoverController != nil) {
[self.masterPopoverController dismissPopoverAnimated:YES];
}
}
- (void)configureView
{
// Update the user interface for the detail item.
if (self.detailItem) {
self.detailDescriptionLabel.text = [self.detailItem description];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
[passwordF setSecureTextEntry:YES];
userNameF.font=[UIFont systemFontOfSize:24];
userNameF.frame = CGRectMake(320.0f,60.0f,360.0f,50.0f);
passwordF.frame = CGRectMake(320.0f,145.0f,360.0f,50.0f);
serverF.frame= CGRectMake(320.0f,235.0f,360.0f,50.0f);
userNameF.font=[UIFont boldSystemFontOfSize:24];
[userNameF becomeFirstResponder];
serverF.font=[UIFont boldSystemFontOfSize:24];
passwordF.font=[UIFont systemFontOfSize:24];
acceptButton.titleLabel.font=[UIFont boldSystemFontOfSize:26];
// Do any additional setup after loading the view, typically from a nib.
[self configureView];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return YES;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
self.title = NSLocalizedString(@"Detail", @"Detail");
}
return self;
}
#pragma mark - Split view
- (void)splitViewController:(UISplitViewController *)splitController willHideViewController:(UIViewController *)viewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)popoverController
{
barButtonItem.title = NSLocalizedString(@"Master", @"Master");
[self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];
self.masterPopoverController = popoverController;
}
- (void)splitViewController:(UISplitViewController *)splitController willShowViewController:(UIViewController *)viewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem
{
// Called when the view is shown again in the split view, invalidating the button and popover controller.
[self.navigationItem setLeftBarButtonItem:nil animated:YES];
self.masterPopoverController = nil;
}
@end
我想用messID填充TableViewCells，并且每个单元格的详细信息(推送到新的视图控制器中)将在上方包含内容"
这是我的TableViewController文件，称为messages:
(.h文件)
This one is my TableViewController file called messages:
(.h file)
#import <UIKit/UIKit.h>
@interface messages : UITableViewController{
NSMutableArray *mesid,*contents;
}
@property(retain,nonatomic)NSMutableArray *mesid,*contents;
@end
和.m文件:
#import "messages.h"
#import "messageDetail.h"
@implementation messages
@synthesize mesid;
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
// Uncomment the following line to preserve selection between presentations.
self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)viewWillAppear:(BOOL)animated
{
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return YES;
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
#warning Potentially incomplete method implementation.
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
#warning Incomplete method implementation.
// Return the number of rows in the section.
return [mesid count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
cell.textLabel.text=[mesid objectAtIndex:indexPath.row];
[tableView reloadData];
// Configure the cell...
return cell;
}
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// Navigation logic may go here. Create and push another view controller.
messageDetail *detailViewController = [[messageDetail alloc] initWithNibName:@"messageDetail" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
detailViewController.title=@"Message Detail";
[detailViewController release];
}
@end
我的最后一个控制器是messageDetails.其接口文件为:
My last controller is messageDetails. Its interface file is:
#import <UIKit/UIKit.h>
@interface messageDetail : UIViewController
@end
最后一个是messageDetail的实现文件:
And last one, messageDetail's implementation file:
#import "messageDetail.h"
@implementation messageDetail
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return YES;
}
@end
推荐答案
通过快速浏览，您发现了几个问题:
1.您有一个UITableViewController实例. UITableViewController的正确初始化是initWithStyle:，请改用它.否则，您需要做一些额外的工作，而实际上并不需要.
2.您正在从UIAlertView实例中的按钮检查字符串.我的建议是不要这样做.字符串有些不稳定.可以插入多语言作为功能，之后您可能会遇到问题.而是检查索引.这是一个简单的诠释，而不是令人头疼的警报！
3.您已将NSMutableArray设置为messages类中的属性.您为什么不填充它.这就是为什么信息没有出现在您的表中的原因:因为您没有将其提供给特定的类.
从控制器中初始化控制器(包含表视图的类)，并从原始控制器中提供其内容.
You have several issues I found just by taking a quick look:
1. You have an instance of UITableViewController. The proper initialization for a UITableViewController is initWithStyle: Use that instead. Otherwise you need to do some extra work, and it's really not needed.
2. You are checking the strings from the buttons in your UIAlertView instance. My recommandation is not to do that. Strings are somehow volatile. Multi language can be inserted as a feature and you can have issues after that. Check the index instead. It's a simple int, not headaches alert !
3. You have setted your NSMutableArray as a property in your messages class. Why don't you populate it. That's why the information isn't appearing in your table: because you are not providing it to the specific class.
From the controller you are initializing the controller (class that contains the table view), provide its content from the original controller.
建议: 4.为了实现标准化，请使用大写字母命名您的类，并使用小字母命名您的变量.常数应以"k"字母开头.
Advices: 4. For standardization, name your classes with capital letters and your variables with small ones. Constants should begin with "k" letter.
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