in my .h file i have:
#import <UIKit/UIKit.h>
#interface untitled : UIViewController
{
NSMutableString * sResults;
}
#property (nonatomic,retain) NSMutableString * sResults;
#end
In my .m i have:
#import "untitled.h"
#implementation untitled
#synthesize sResults;
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
sResults = [[NSMutableString alloc] initWithString:#"Hello"];
[sResults appendString:#" World"];
}
#end
Whenever i check sResults it says "Out of scope".. what am i doing wrong?
Try this:
- (void)viewDidLoad {
[super viewDidLoad];
self.sResults = [NSMutableString stringWithString:#"Hello"]; //retained in synthesized setter
[self.sResults appendString:#" World"];
}
Related
I have a little app that have by default youtube as homepage. You can change it in a little menu, but it doesn't work and I don't know why.
Here's the code
viewController
.h
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController{
IBOutlet UIWebView *webView;
}
#property (retain, nonatomic) NSArray *array;
#property (retain, nonatomic) NSString *string1;
-(NSString *) dataFilePath;
- (IBAction)settings:(id)sender;
- (IBAction)home:(id)sender;
#end
.m
#import "ViewController.h"
#import "settings.h"
#implementation ViewController
#synthesize array;
#synthesize string1;
- (void)viewDidLoad
{
[super viewDidLoad];
if ([string1 isEqual:#"youtube"]) {
NSMutableArray *Array = [[NSMutableArray alloc] init];
[Array addObject:#"http://www.youtube.com"];
[Array writeToFile:[self dataFilePath] atomically:YES];
}
NSString *filePath = [self dataFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
{
array = [[NSArray alloc] initWithContentsOfFile:filePath];
}
NSString *string = [NSString stringWithString:[array objectAtIndex:0]];
[webView loadRequest:[[NSURLRequest alloc] initWithURL:[[NSURL alloc] initWithString:string]]];
}
-(NSString *) dataFilePath
{
NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentDirectory = [path objectAtIndex:0];
return [documentDirectory stringByAppendingPathComponent:#"url.plist"];
string1 = #"youtube";
}
- (IBAction)settings:(id)sender {
settings *NView = [[settings alloc] initWithNibName:nil bundle:nil];
[self presentModalViewController:NView animated:YES];
}
- (IBAction)home:(id)sender {
NSString *filePath = [self dataFilePath];
if ([[NSFileManager defaultManager] fileExistsAtPath:filePath])
{
array = [[NSArray alloc] initWithContentsOfFile:filePath];
}
NSString *string = [NSString stringWithString:[array objectAtIndex:0]];
NSLog(#"%#\n",string);
[webView loadRequest:[[NSURLRequest alloc] initWithURL:[[NSURL alloc] initWithString:string]]];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#end
Settings //here's the menu where I can change the homepage
.h
#import <UIKit/UIKit.h>
#import "ViewController.h"
#interface settings : UIViewController{
ViewController *viewCont;
IBOutlet UITextField *field;
}
-(IBAction)back:(id)sender;
- (IBAction)setHP:(id)sender;
#end
.m
#import "settings.h"
#import "ViewController.h"
#implementation settings
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib
}
- (void)viewDidUnload
{
field = nil;
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
-(IBAction)back:(id)sender{
[self dismissModalViewControllerAnimated:YES];
}
- (IBAction)setHP:(id)sender {
NSMutableArray *Array = [[NSMutableArray alloc] init];
[Array addObject:field.text];
[Array writeToFile:[viewCont dataFilePath] atomically:YES];
[viewCont.string1 initWithString:#"other" ];
NSLog(#"%#\n", viewCont.string1);// HERE XCODE SAYS string1 = null!!! WHY?
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end
So anyone knows what am I doing wrong? Please help me, I have searched around the web for 4 days and I didn't find anything!
I don't understand well your problem but i notice that you are not initializing viewCont in the setHP: action.
try to add this line:
ViewController *viewCont=[[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
just before
[viewCont.string1 initWithString:#"other" ];
I want to store the array of urls in my appdelegate array i.e. logoArray from myMutableArray and then use it in other viewcontroller, but i am uable to copy as may be i am doing shallow copy, i have tried othes ways also like initwithArray:copyItems.
code:-
#class FirstViewController;
#interface AppDelegate_iPhone : NSObject <UIApplicationDelegate> {
UIWindow *window;
FirstViewController *viewController;
NSMutableArray *logoArray;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) NSMutableArray *logoArray;
#end
// NO initialization of logoArra is done in .M file
#class AppDelegate_iPhone;
#interface FirstViewController : UIViewController {
NSMutableArray *array;
NSString *logoString;
AppDelegate_iPhone *appDelegate;
}
#end
#implementation FirstViewController
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
int x=5,y=10;
UIApplication *app = [UIApplication sharedApplication];
appDelegate=app.delegate;
NSLog(#" Array ====== %d",[appDelegate.logoArray count]);
array = [[NSMutableArray alloc]initWithArray:appDelegate.logoArray];
NSLog(#"array at 0 ===== %#",[array objectAtIndex:0]);
for (int i=0; i<[array count]; i++) {
logoString = [array objectAtIndex:i];
NSLog(#"%#",logoString);
UIImage *imageFromUrl = [UIImage imageWithContentsOfFile:[NSURL fileURLWithPath:logoString]];
UIImageView *imgView = [[UIImageView alloc] initWithImage:imageFromUrl];
[imgView setFrame:CGRectMake(x, y, 196, 90)];
[self.view addSubview:imgView];
// UITapGestureRecognizer *tgr = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(onTapImage)];
// [imgView addGestureRecognizer:tgr];
// [tgr release];
//Do the rest of your operations here, don't forget to release the UIImageView
x = x + 200;
// [imgView release];
}
}
#class Litofinter,AppDelegate_iPhone;
#interface ParsingViewController : NSObject<NSXMLParserDelegate> {
NSString *myString;
NSMutableArray *myMutableArray;
Litofinter *obj;
NSString *currentElement;
AppDelegate_iPhone *appDelegate;
}
#property(nonatomic, retain) NSString *myString;
#property(nonatomic, retain) NSArray *myMutableArray;
#end
#import "ParsingViewController.h"
#import "Litofinter.h"
#import "AppDelegate_iPhone.h"
#implementation ParsingViewController
#synthesize myMutableArray, myString;
- (void)parserDidStartDocument:(NSXMLParser *)parser
{
myMutableArray = [[NSMutableArray alloc]init];
}
// I have parsed here my XML and array gets stored in myMutableArray
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
UIApplication *app = [UIApplication sharedApplication];
appDelegate=app.delegate;
appDelegate.logoArray = [[NSMutableArray alloc]initWithArray:myMutableArray];
// NSLog(#"appDelegate.logoArray count %d",[appDelegate.logoArray count]);
for (Litofinter *lito in appDelegate.logoArray) {
NSLog(#"Array Elements :----- %#",lito.cLogo);
}
}
Personally I wouldn't create an array in a viewcontroller and then store it in the appdelegate. I'd be more inclined to create a model for the data ( a class that gets and stores the data and provides it to the view controllers).
this thread may help:
iPhone: Using a NSMutableArry in the AppDelegate as a Global Variable
Actually I have parsed an XML and store URL's of images as an NSMutableArray object, but I want this array to be used in another ViewController (to give to UIImage in UIImageView to show Images at runtime), so I am trying to copy that Mutable array to myAppDelegate_iPhone's NSMutableArray. And I want to again copy that Appdelegate's array to my next or other ViewControllers NSMutableArray.
so can anyone help me out pleaseeeeee? Here is my code :-
code:-
#class FirstViewController;
#interface AppDelegate_iPhone : NSObject <UIApplicationDelegate> {
UIWindow *window;
FirstViewController *viewController;
NSMutableArray *logoArray;
}
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) NSMutableArray *logoArray;
#end
#import "AppDelegate_iPhone.h"
#import "FirstViewController.h"
#import "ParsingViewController.h"
#implementation AppDelegate_iPhone
#synthesize window,logoArray;
#pragma mark -
#pragma mark Application lifecycle
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
viewController = [[FirstViewController alloc]initWithNibName:#"FirstViewController" bundle:nil];
viewController.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
NSURL *url = [[NSURL alloc] initWithString:#"http://litofinter.es.milfoil.arvixe.com/displayxml1.aspx"];
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:url];
//Initialize the delegate.
ParsingViewController *parser = [[ParsingViewController alloc] init];
//Set delegate
[xmlParser setDelegate:parser];
//Start parsing the XML file.
BOOL success = [xmlParser parse];
if(success)
NSLog(#"No Errors");
else
NSLog(#"Error Error Error!!!");
logoArray = [[NSMutableArray alloc]init];
[self.window addSubview:viewController.view];
[self.window makeKeyAndVisible];
return YES;
}
// dealloc done
#end
#class Litofinter,AppDelegate_iPhone;
#interface ParsingViewController : NSObject<NSXMLParserDelegate> {
NSString *myString;
NSMutableArray *myMutableArray;
Litofinter *obj;
NSString *currentElement;
AppDelegate_iPhone *appDelegate;
}
#import "ParsingViewController.h"
#import "Litofinter.h"
#import "AppDelegate_iPhone.h"
#implementation ParsingViewController
#synthesize myMutableArray, myString;
-(id)init{
if(self == [super init]){
myMutableArray = [[NSMutableArray alloc] init];
}
return self;
}
- (void)parserDidStartDocument:(NSXMLParser *)parser
{
//myMutableArray = [[NSMutableArray alloc]init];
}
// Parsing done here
- (void)parserDidEndDocument:(NSXMLParser *)parser
{
appDelegate = (AppDelegate_iPhone *)[[UIApplication sharedApplication] delegate];
//UIApplication *app = [UIApplication sharedApplication];
//appDelegate=app.delegate;
appDelegate.logoArray = [[NSMutableArray alloc]initWithArray:myMutableArray];
NSLog(#"appDelegate.logoArray count %d",[appDelegate.logoArray count]);
for (Litofinter *lito in appDelegate.logoArray) {
NSLog(#"Array Elements :----- %#",lito.cLogo);
}
}
#end
#import <UIKit/UIKit.h>
#class AppDelegate_iPhone,Litofinter,ParsingViewController;
#interface FirstViewController : UIViewController {
NSMutableArray *array;
//Litofinter *lito;
NSString *logoString;
AppDelegate_iPhone *appDelegate;
ParsingViewController *obj;
}
#end
#import "FirstViewController.h"
#import "AppDelegate_iPhone.h"
#import "Litofinter.h"
#import "ParsingViewController.h"
#implementation FirstViewController
-(id)init{
if(self == [super init]){
obj = [[ParsingViewController alloc] init];
array = [[NSArray alloc] initWithArray: obj.myMutableArray];
}
return self;
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
int x=5,y=10;
appDelegate = (AppDelegate_iPhone *)[[UIApplication sharedApplication] delegate];
// UIApplication *app = [UIApplication sharedApplication];
// appDelegate=app.delegate;
NSLog(#"delegate Array ====== %d",[appDelegate.logoArray count]);
NSLog(#"New Array ====== %d",[obj.myMutableArray count]);
/*
array = [[NSMutableArray alloc]initWithArray:appDelegate.logoArray];
NSLog(#"array at 0 ===== %#",[array objectAtIndex:0]);
for (Litofinter *lito1 in obj.myMutableArray) {
NSLog(#"Array Elements in Lito1 are :------------- %#",lito1.cLogo);
}
for (Litofinter *lito2 in array) {
NSLog(#"Array Elements in Lito1 are :------------- %#",lito2.cLogo);
}
*/
for (Litofinter *lito in obj.myMutableArray) {
//for (int i=0; i<[appDelegate.logoArray count]; i++) {
// lito.cLogo = [array objectAtIndex:i];
NSLog(#"%#",lito.cLogo);
UIImage *imageFromUrl = [UIImage imageWithContentsOfFile:[NSURL fileURLWithPath:lito.cLogo]];
UIImageView *imgView = [[UIImageView alloc] initWithImage:imageFromUrl];
[imgView setFrame:CGRectMake(x, y, 196, 90)];
[self.view addSubview:imgView];
UITapGestureRecognizer *tgr = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(onTapImage)];
[imgView addGestureRecognizer:tgr];
// [tgr release];
//Do the rest of your operations here, don't forget to release the UIImageView
x = x + 200;
}
}
-(void)onTapImage
{
UIAlertView *alert = [[UIAlertView alloc]initWithTitle:#"Message from mAc" message:#"Trail" delegate:self cancelButtonTitle:#"Cancel" otherButtonTitles:#"Ok",nil];
[alert show];
}
- (void)dealloc {
[super dealloc];
}
#end
You can use this.
UIImage *imageFromUrl = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:lito.cLogo]]];
//StringStringViewController.h
#import <UIKit/UIKit.h>
#import "MyClass.h"
#interface SendStringViewController : UIViewController {
NSString *string1;
MyClass *secondview;
}
#property (nonatomic, retain) NSString *string1;
#property (nonatomic, retain) MyClass *secondview;
-(IBAction)sendString1:(id)sender;
#end
// SendStringViewController.m
#import "SendStringViewController.h"
#implementation SendStringViewController
#synthesize string1;
#synthesize secondview;
-(IBAction)sendString1:(id)sender {
string1 = #"firststring";
secondview.string2 = string1;
MyClass *mc = [[MyClass alloc]init];
[self presentModalViewController:mc animated:YES];
}
#end
// MyClass.h
#import <UIKit/UIKit.h>
#interface MyClass : UIViewController {
NSString *string2;
}
#property (nonatomic, retain) NSString *string2;
#end
// MyClass.m
#import "MyClass.h"
#implementation MyClass
#synthesize string2;
- (void)viewDidLoad {
NSLog(#"%#", string2);
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
#end
I know it's a simple and easy task but I'm having hard time googling it, because it's way too easy.
Here's the link of my project too.
Thanks.
http://dl.dropbox.com/u/12439052/SendString.zip
Edit: the question is on the title actually but how do i send the value of string1 to string2 cause currently when i nslog the string2 only null comes out
-(IBAction)sendString1:(id)sender {
string1 = #"firststring";
MyClass *mc = [[MyClass alloc]init];
mc.string2 = string1;
[self presentModalViewController:mc animated:YES];
}
this code is from a sample
in .h part :
#interface ViewController : UITableViewController < NSNetServiceBrowserDelegate > {
NSMutableArray * tableData;
NSNetServiceBrowser * _browser;
NSMutableArray * _foundServices;
NSURLConnection * _connection;
NSInputStream * _consumerStream;
NSString * controllerHostName;
}
#property (nonatomic, retain) NSMutableArray * tableData;
#property (nonatomic, retain) NSNetServiceBrowser * _browser;
#property (nonatomic, retain) NSMutableArray * _foundServices;
#property (nonatomic, retain) NSURLConnection * connection;
#property (nonatomic, retain) NSInputStream * consumerStream;
#property (nonatomic, retain) NSString * controllerHostName;
in the .m part
#import "ViewController.h"
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <CFNetwork/CFNetwork.h>
#synthesize tableData;
#synthesize _browser;
#synthesize _foundServices;
#synthesize consumerStream = _consumerStream;
#synthesize connection = _connection;
#synthesize controllerHostName;
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
_browser = [[NSNetServiceBrowser alloc] init];
[_browser setDelegate:self];
[_browser searchForServicesOfType:#"_service._tcp" inDomain:#""];
[super viewWillAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[_browser stop];
_browser.delegate = nil;
[_browser release];
_browser = nil;
[_foundServices removeAllObjects];
}
- (void)netServiceBrowser:(NSNetServiceBrowser *)netServiceBrowser didFindService:(NSNetService *)netService moreComing:(BOOL)moreServicesComing
{
self.controllerHostName = [NSString stringWithFormat:#"%#.%#", netService.name, netService.domain];
NSLog(#"ControllerHost String is: %#", self.controllerHostName);
NSLog(#"URL to use is === %#.%#", netService.name, netService.domain);
if (!_foundServices) {
_foundServices = [[NSMutableArray alloc] init];
}
[_foundServices addObject:netService];
[self.tableView reloadData];
}
- (void)netServiceBrowser:(NSNetServiceBrowser *)netServiceBrowser didRemoveService:(NSNetService *)netService moreComing:(BOOL)moreServicesComing
{
[_foundServices removeObject:netService];
}
- (void)netServiceBrowserDidStopSearch:(NSNetServiceBrowser *)aNetServiceBrowser
{
[_foundServices removeAllObjects];
}
I declaration all the header as the sample does
But I got error message "Cannot find protocol declaration for "NSNetServiceDelegate"
in .h
interface ViewController : UITableViewController < NSNetServiceBrowserDelegate >
So did I missing anything to declaration ?
The sample doesn't has any warning or error
I thought it's defined in "NSNetServices.h" instead?
Add this to your header:
#import <Foundation/NSNetServices.h>
I got this from the BonjourWeb Apple sample code project.
The problem is a unused function. Just delete:
[self.tableView reloadData];
It will be fine!
I found something like answer ,JUST REMOVE
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[_browser stop];
_browser.delegate = nil;
[_browser release];
_browser = nil;
[_foundServices removeAllObjects];
}
The program will get Netservice I want...
WHY ?