Here's my .h file:
The IBOutlet I am having problems with is the textbox. I would like to retain the value in the textbox as an NSString:
#interface UploaderViewController : UIViewController <UINavigationControllerDelegate, UIImagePickerControllerDelegate> {
IBOutlet UIImageView *imageView;
IBOutlet UITextField *textCaption;
NSString *caption;
}
- (IBAction)pushPick;
- (IBAction)pushUpload;
#property (nonatomic, retain) IBOutlet UITextField *textCaption;
#end
Where the value is stored in this NSString:
- (IBAction)pushUpload {
caption = textCaption.text;
}
I think you meant to do something like this:
- (IBAction)pushUpload {
[caption release];
caption = [textCaption.text copy];
}
In shouldChangeTextInRange call your pushUpload.
Related
// ViewController.h
#interface ViewController : UIViewController{
IBOutlet UIButton *btnname;
IBOutlet UITextView *txtname;
IBOutlet UILabel *lblname;
}
#property (retain, nonatomic) IBOutlet UITextField *txtname;
#property (retain, nonatomic) IBOutlet UILabel *lblname;
- (IBAction)Btntikla:(id)sender;
#end
//ViewController.m
#implementation ViewController
#synthesize txtname;//here it says -type of property txtname (uiTextView *) does not match of ivar txtname(uiTextView)- this mistakes
#synthesize lblname;
- (void)dealloc {
[lblname release];
[txtname release];
[super dealloc];
}
- (IBAction)Btntikla:(id)sender {
NSString *name=[txtname text];
lblname.text=name;
}
#end
//my whole program is this.it gives this error?type of property txtname (uiTextView *) does not match of ivar txtname(uiTextView)..Can you help me pls?? what is my mistake ?
That's beacause you have
#property (retain, nonatomic) IBOutlet UITextField *txtname;
and
IBOutlet UITextView *txtname;
And UITextField and UITextView are differents controls
I want to call a function in a viewController from my appDelegate but with the following code, it doesn't get called. What am I doing wrong?
AppDelegate.h:
#import <UIKit/UIKit.h>
#import "DetailsToTransfer.h"
#class AccountDetailTransferViewController;
#interface AccountDetailTransferAppDelegate : NSObject <UIApplicationDelegate> {
DetailsToTransfer *objDetailsToTransfer;
}
#property (nonatomic, retain) DetailsToTransfer *objDetailsToTransfer;
#property (nonatomic, retain) IBOutlet UIWindow *window;
#property (nonatomic, retain) IBOutlet AccountDetailTransferViewController *viewController;
-(void)sendToTransferScreen:(NSArray *)detailsArray;
#end
AppDelegate.m:
....
-(void)sendToTransferScreen:(NSArray *)detailsArray {
[objDetailsToTransfer setLabels:detailsArray];
objDetailsToTransfer = [[DetailsToTransfer alloc]initWithNibName:#"DetailsToTransfer" bundle:nil];
[self.window addSubview:objDetailsToTransfer.view];
}
DetailsToTransfer.h:
#import <UIKit/UIKit.h>
#interface DetailsToTransfer : UIViewController {
NSArray *accountDetailsArray;
UILabel *nameLabel;
UILabel *accountLabel;
IBOutlet UIButton *btnTransfer;
IBOutlet UIButton *btnBack;
}
#property (nonatomic, retain) NSArray *accountDetailsArray;
#property (nonatomic, retain) IBOutlet UILabel *nameLabel;
#property (nonatomic, retain) IBOutlet UILabel *accountLabel;
-(IBAction)sendDetails;
-(IBAction)goBack;
-(void)setLabels:(NSArray *)array;
#end
DetailsToTransfer.m
....
-(void)setLabels:(NSArray *)array {
NSLog(#"Setting Labels");
self.nameLabel.text = [array objectAtIndex:0];
self.accountLabel.text = [array objectAtIndex:1];
}
....
I would like to add that all the properties have been synthesized and that I'm calling the method in the appDelegate properly (i checked using NSLogs)
In AppDelegate.m:
Looks as if you are calling a method on your object before the object has been created. Until you have alloc / init your object, there will be no labels to set text.
Try changing your method to this:
-(void)sendToTransferScreen:(NSArray *)detailsArray {
if (!objDetailsToTransfer) {
objDetailsToTransfer = [[DetailsToTransfer alloc]initWithNibName:#"DetailsToTransfer" bundle:nil];
[objDetailsToTransfer setLabels:detailsArray];
[self.window addSubview:objDetailsToTransfer.view];
}
}
The problem might be that you are trying to set the values on a object that hasn't been created yet. I also provided an if statement to prevent the object from being created multiple times.
I'm trying to use a UITextField as an output for a simple encryption. The field starts out with a nil string (its default behavior), and I try to update it in the encryptButtonPressed: action. I know I'm getting a good NSString into ciphertext, and I'm getting no errors or warnings or anything that the method doesn't exist, but the field remains blank. Any ideas?
Here's the header:
#interface FirstViewController : UIViewController <UITextFieldDelegate> {
IBOutlet UITextField *affineKeyField;
IBOutlet UITextField *shiftKeyField;
IBOutlet UITextField *messageField;
IBOutlet UITextField *ciphertextField;
MAAffineMachine* machine;
}
#property (nonatomic, retain) UITextField *affineKeyField;
#property (nonatomic, retain) UITextField *shiftKeyField;
#property (nonatomic, retain) UITextField *messageField;
#property (nonatomic, retain) UITextField *ciphertextField;
#property (nonatomic, retain) UIButton *encryptButton;
#property (nonatomic, retain) UIButton *clipboardButton;
- (IBAction)encryptButtonPressed:(id)sender;
- (IBAction)clipboardButtonPressed:(id)sender;
#end
And the action, defined in the controller's implementation:
- (IBAction)encryptButtonPressed:(id)sender {
NSLog(#"Encrypt Button pushed.\n");
int affine = [[affineKeyField text] intValue];
int shift = [[shiftKeyField text] intValue];
NSString* message = [messageField text];
NSLog(#"%d, %d, %#", affine, shift, message);
NSString* ciphertext = [machine encryptedStringFromString:message
ForAffine:affine
Shift:shift];
NSLog(#"%#\n", ciphertext);
[[self ciphertextField] setText: ciphertext];
}
If ciphertext has a proper value, you should check that ciphertextField is linked properly in the interface builder.
Try [[self ciphertextField] setText: ciphertext] -> [ciphertextField setText: ciphertext] or cipherTextField.text = ciphertext;
I created a subclass from UIView
#import <UIKit/UIKit.h>
#interface MeeSelectDropDownView : UIView {
UILabel *mainText;
UIImage *bgImg;
UIImageView *bgView;
UIImageView *originView;
NSMutableArray *labelArray;
int selectedItem;
BOOL inSelectTag;
float _defaultHeight;
}
#property (nonatomic , retain) UIImage *bgImg;
#property (nonatomic , retain) UIImageView *bgView;
#property (nonatomic , retain) NSMutableArray *labelArray;
#property (nonatomic , retain) UIImageView *originView;
#property (nonatomic , retain) UILabel *mainText;
#property (nonatomic , readonly) int selectedItem;
- (void) setViewHeight:(float)aheight;
-(void) showDropList;
-(void) hiddenDropList;
-(void) setStringByArray:(NSArray*)array;
-(void)hiddenLabels
{
for(UILabel *aLabel in labelArray){
[aLabel removeFromSuperview];
}
}
Is it possible to generate an Event from function 'hiddenLabels' to inform and do somethings
Thanks
interdev
It is totally unclear what you are trying to do.
Suggestion: you can consider either posting an NSNotification, or registering observers using KVO (Key Value Observing).
I have a method tied to four buttons. I want to create an array containing each button, and later retrieve and interact w/ a button from the array. The code I was tinkering with below. When I try to get a button from the array and send it a message, it goes kablooie.
Any thoughts on what I'm doing wrong?
Hack_DumpViewController.h
#import <UIKit/UIKit.h>
#interface Hack_DumpViewController : UIViewController {
IBOutlet UIButton *redButton;
IBOutlet UIButton *greenButton;
IBOutlet UIButton *blueButton;
IBOutlet UIButton *yellowButton;
NSArray *buttonMapping;
}
- (IBAction) changeToYo:(id)sender;
#property (nonatomic, retain) UIButton *redButton;
#property (nonatomic, retain) UIButton *greenButton;
#property (nonatomic, retain) UIButton *blueButton;
#property (nonatomic, retain) UIButton *yellowButton;
#property (nonatomic, retain) NSArray *buttonMapping;
#end
Hack_DumpViewController.m
#import "Hack_DumpViewController.h"
#implementation Hack_DumpViewController
#synthesize redButton;
#synthesize greenButton;
#synthesize yellowButton;
#synthesize blueButton;
#synthesize buttonMapping;
- (IBAction) changeToYo:(id)sender {
NSLog(#"changing numbers!");
for (UIButton *b in buttonMapping) {
[b setTitle:#"yo!"];
}
NSLog(#"changed to numbers!");
}
- (void)viewDidLoad {
buttonMapping = [[NSArray alloc] initWithObjects:greenButton, redButton, yellowButton, blueButton, nil];
}
[NSArray arrayWithObjects:...] returns an autoreleased array, so by the time you use it, it no longer exists and you end up messaging an invalid pointer. What you want is [[NSArray alloc] initWithObjects:...] (remembering to release it in your dealloc).
Why not tag the views in interface builder and then treat them like an array, much easier