I wonder if there is anything wrong in this code:
//MyViewController.h
#interface MyViewController : UIViewController
#property (weak, nonatomic) IBOutlet UILabel *aLabel;
#property (strong, nonatomic) NSString *myString;
#end
//MyViewController.m
#implementation MyViewController
-(void)setMyString:(NSString *)myString{
if (_myString != myString) {
_myString = myString;
self.myLabel.text = myString;
}
}
#end
Regards!
you need
![_myString isEqualToString: myString];
instead of
_myString != myString
PS:
also use
self->_myString
please make sure that you are using
self.myString = #"new String"
instead of
_myString = #"new String"
self.property is equal to [self setProperty]
Related
I have a textView1 and when I type something and press a button URL opens. When I type in English everything works fine, but I also have to type in russian and it doesn't work. So I need to encode it. Can someone help with coding?
my SozdikViewerController.h file
import <UIKit/UIKit.h>
#interface SozdikViewController : UIViewController
#property (strong, nonatomic) IBOutlet UITextView *textView1;
#property (weak, nonatomic) IBOutlet UIButton *Button_Ask;
-(IBAction)ask;
#end
my SozdikViewerController.m file
#import "SozdikViewController.h"
-(IBAction)ask{
NSString *urlString = [NSString stringWithFormat:#"http://www.audaru.kz/?product=SoylemMT&word=%#&app_request=true", [[self textView1] text]];
NSString *newString;
newString = [urlString stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:newString]];
}
#end
newString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
I am trying to get a reply from a notification and pass the string to a label.
But the label (nResponse) does not change after I give the reply, why isn't the label updating? Is there a problem with the "activationType" method?
AppDelegate.h
#property (weak) IBOutlet NSTextField *nTitle;
#property (weak) IBOutlet NSTextField *nMessage;
-(IBAction)showNotification:(id)sender;
#property (weak) IBOutlet NSTextField *nResponse;
#property (assign) IBOutlet NSWindow *window;
#property BOOL hasReplyButton NS_AVAILABLE(10_9, NA);
#property (copy) NSString *responsePlaceholder NS_AVAILABLE(10_9, NA);
#property (readonly) NSAttributedString *response NS_AVAILABLE(10_9, NA);
#property (copy) NSImage *contentImage NS_AVAILABLE(10_9, NA);
#end
AppDelegate.m
#synthesize nTitle;
#synthesize nMessage;
#synthesize nResponse;
#synthesize window;
- (IBAction)showNotification:(id)sender{
NSUserNotification *notification = [[NSUserNotification alloc] init];
notification.title = [nTitle stringValue];
notification.informativeText = [nMessage stringValue];
notification.soundName = NSUserNotificationDefaultSoundName;
notification.responsePlaceholder = #"Reply";
notification.hasReplyButton = true;
[[NSUserNotificationCenter defaultUserNotificationCenter] deliverNotification:notification];
}
- (BOOL)userNotificationCenter:(NSUserNotificationCenter *)center shouldPresentNotification:(NSUserNotification *)notification;
{
if (notification.activationType == NSUserNotificationActivationTypeReplied){
NSString* userResponse = notification.response.string;
[nResponse setStringValue:userResponse]; //set label to response
NSLog(#"%#", userResponse);
}
return YES;
}
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
// Insert code here to initialize your application
[[NSUserNotificationCenter defaultUserNotificationCenter] setDelegate:self];
}
#end
NSUserNotificationCenter *center = [NSUserNotificationCenter defaultUserNotificationCenter];
center.delegate = self;
You should also make sure your Notice class implements the NSUserNotificationCenterDelegate protocol.
I'm sure there is a simple explanation for this.
I am looking to transfer the data (not store) but transfer the text the user types into a text field and display it as a UILabel in another ViewController.
I already know how to convert text entered by the user into a label on the same viewcontroller.
I guess my problem is importing.
the .h:
#interface ViewController : UIViewController {
IBOutlet UITextField *firstPerson;
IBOutlet UITextField *secondPerson;
IBOutlet UIButton *calculateButton;
NSString *firstName;
NSString *secondName;
}
#property (nonatomic, retain) IBOutlet UITextField *firstPerson;
#property (nonatomic, retain) IBOutlet UITextField *secondPerson;
#property (nonatomic, retain) NSString *firstName;
#property (nonatomic, retain) NSString *secondName;
#property (nonatomic, retain) IBOutlet UIButton *calculateButton;
-(IBAction)calculate;
#end
the .m:
-(IBAction)calculate {
//Linked to UIButton
//This is the first View Controller.
// firstName = firstPerson.text;
// secondName = secondPerson.text;
secondViewController = [[ShowStats alloc] init];
}
my secondview controller .m (ShowStats):
#import "ShowStats.h"
#import "ViewController.h"
- (void)viewDidLoad
{
firstName = firstPerson.text;
secondName = secondPerson.text;
[super viewDidLoad];
}
Many thanks!
EDIT
ViewController.h
#import <UIKit/UIKit.h>
#import "ShowStats.h"
#interface ViewController : UIViewController {
IBOutlet UITextField *firstPerson;
IBOutlet UITextField *secondPerson;
IBOutlet UIButton *calculateButton;
//NSString *firstName;
// NSString *secondName;
}
#property (nonatomic, retain) IBOutlet UITextField *firstPerson;
#property (nonatomic, retain) IBOutlet UITextField *secondPerson;
//#property (nonatomic, retain) NSString *firstName;
//#property (nonatomic, retain) NSString *secondName;
#property (nonatomic, retain) IBOutlet UIButton *calculateButton;
-(IBAction)calculate;
#end
ViewController.m
#import "ViewController.h"
#import "ShowStats.h"
#implementation ViewController
#synthesize firstPerson, secondPerson;
//#synthesize firstName, secondName;
#synthesize calculateButton;
ShowStats *secondViewController;
-(IBAction)calculate {
secondViewController = [[ShowStats alloc] init];
secondViewController.firstName = firstPerson.text;
}
ShowStats.h
#interface ShowStats : UIViewController{
IBOutlet UILabel *nameStats;
}
#property (nonatomic, retain) IBOutlet UILabel *nameStats;
#property (nonatomic, retain) NSString *firstName;
#property (nonatomic, retain) NSString *secondName;
#end
ShowStats.m
- (void)viewDidLoad
{
nameStats.text = [NSString stringWithFormat:#"%#", firstName];
//secondLabel.text = self.secondName;
[super viewDidLoad];
}
Make these properties in ShowStats class
#property (nonatomic, retain) NSString *firstName;
#property (nonatomic, retain) NSString *secondName;
and change this to this
-(IBAction)calculate {
secondViewController = [[ShowStats alloc] init];
secondViewController.firstName = firstPerson.text;
secondViewController.secondName = secondPerson.text;
}
then set these strings to UILablel in your viewDidLoad
In ShowStats.h, add the following:
#property(nonatomic, copy) NSString* firstName;
#property(nonatomic, copy) NSString* secondName;
In ShowStats.m add/update the following:
#synthesize firstName, secondName;
//...
- (id) init {
if (self = [super init]) {
self.firstName = nil;
self.secondName = nil;
//...
}
return self;
}
- (void) dealloc {
self.firstName = nil;
self.secondName = nil;
//...
[super dealloc];
}
- (void)viewDidLoad {
//or even better, do this in viewWillAppear instead
firstLabel.text = self.firstName;
secondLabel.text = self.secondName;
//...
[super viewDidLoad];
}
Finally, in ViewController.m, implement calculate like this:
-(IBAction)calculate {
//Linked to UIButton
//This is the first View Controller.
// firstName = firstPerson.text;
// secondName = secondPerson.text;
secondViewController = [[ShowStats alloc] init];
secondViewController.firstName = firstPerson.text;
secondViewController.secondName = secondPerson.text;
//display the view controller here
[secondViewController autorelease];
}
If it is a navigation then in your SecondViewController you can call:
ViewController *viewController = [self.navigationController.viewControllers objectAtIndex:0];
firstName = [[viewController firstPerson] text];
secondName = [[viewController secondPerson] text];
Or you could do the following for a Single View app:
AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
ViewController *viewController = [appDelegate viewController];
firstName = [[viewController firstPerson] text];
secondName = [[viewController secondPerson] text];
* EDIT *
Add two labels to your .h file (nonatomic, retain) & synthesize in .m . Initialize the labels in viewDidLoad then set them (assuming they are called label1 and label2):
[label1 setText:firstName];
[label2 setText:secondName];
I have a superclass Question:
import <Foundation/Foundation.h>
#import "Answer.h"
#interface Question : NSObject {
NSString* qId;
NSString* qTitle;
NSString* qNumber;
NSString* sectionId;
NSString* type;
Answer* answer;
}
#property (nonatomic, retain) NSString* qId;
#property (nonatomic, retain) NSString* qTitle;
#property (nonatomic, retain) NSString* qNumber;
#property (nonatomic, retain) NSString* sectionId;
#property (nonatomic, retain) NSString* type;
#property (nonatomic, retain) Answer* answer;
#end
#import "Question.h"
#implementation Question
#synthesize qId, qTitle, qNumber, sectionId, type, answer;
-(id)init
{
if (self = [super init])
{
// Initialization code here
answer = [[Answer alloc]init];
}
return self;
}
-(void) dealloc{
[answer release];
[super dealloc];
}
#end
I have several types of Question, one example is a Slider Question. I want this class to subclass Question:
#import <Foundation/Foundation.h>
#import "Question.h"
#interface SliderQuestion : Question {
(NSString*) min;
(NSString*) max;
}
#property (nonatomic, retain) NSString* min;
#property (nonatomic, retain) NSString* max;
#end
}
#import "SliderQuestion.h"
#implementation SliderQuestion
#synthesize min, max;
#end
Is this the correct way to subclass? Will SliderQuestion inherit the properties contained within Question?
SliderQuestion* s = [[SliderQuestion alloc]init];
NSLog(#"%#", s.qId); //is this valid
Do you really want min and max to be instances of NSString? It seems that floats would be more appropriate.
Also, scrap the () in (NSString *) to remove the warning/error message.
Finally, this is the appropriate way to subclass. An instance of SliderQuestion will inherit all properties and methods of the Question class (and NSObject as well)
Notice the ( and ) around the NSStrings, you might wanna remove those.
How to access variables of other class? This is how I implemented it.
#interface Class1 :NSObject {
NSString *Data;
}
#property (nonatomic, retain) NSString *Data;
#implementation Class1
#synthesize Data;
someMethod{
self.Data = #"something";
}
and in Class2 :
#implementation Class2
someMethodOfClass2{
Class1 *c=[[Class1 alloc]init];
[c someMethod];
NSString *str=c.Data;
}
I get c.Data as null in Class2. Am I doing anything wrong here?
-----------myClass1--------------
#interface APIManager : NSObject {
NSString *Data;
}
#property (nonatomic, retain) NSString *Data;
-(void)getData;
#end
#implementation APIManager
#synthesize Data;
-(void)getData{
self.Data=#"response";
}
--------myClass2-------------
#interface Search : NSObject {
}
-(void)searchForItems:(NSString *)query;
#end
#implementation Search
-(void)searchForItems:(NSString *)query {
APIManager *apiManager=[[APIManager alloc]init];
[apiManager getData];
NSLog(#"%#",[apiManager Data]);
}
You should probably use self.Data = #"something" instead of self.Data = "something"
In Objective-C you have to use #"something" instead of "something". Also aren't you missing the variable declaration? In your #interface you should do something like NSString *Data.