Initialization problem
- by zp26
I have a problem.
This is my code.
When i try to use the IBAction SavePosition the "arrayPosition" isn't update.
Else if i initialize the "arrayPosition" in "SavePosition" the value is stored in the array.
Why this anomaly?
#import <UIKit/UIKit.h>
@interface AccelerometroViewController : UIViewController <UIAccelerometerDelegate, UITextFieldDelegate, UIAlertViewDelegate>{
//.....
NSMutableArray *arrayPosizioni;
NSMutableArray *arrayPosizioniCorrenti;
NSString *nomePosizioneCorrente;
}
-(IBAction)salvaPosizione;
//...
@property (nonatomic, assign) NSMutableArray *arrayPosizioni;
@property (nonatomic, assign) NSMutableArray *arrayPosizioniCorrenti;
@property (nonatomic, assign) NSString *nomePosizioneCorrente;
@end
#import "AccelerometroViewController.h"
#import "Position.h"
@implementation AccelerometroViewController
float actualX;
float actualY;
float actualZ;
@synthesize arrayPosition;
@synthesize arrayCurrentPosition;
@synthesize nameCurrentPosition;
-(id)init {
self = [super init];
if (self != nil) {
arrayPosition = [[NSMutableArray alloc]init];
arrayCurrentPosition = [[NSMutableArray alloc]init];
nameCurrentPosition = [NSString stringWithFormat:@"noPosition"];
actualX = 0;
actualY = 0;
actualZ = 0;
}
return self;
}
-(void)updateTextView:(NSString*)nomePosizione
{
NSString *string = [NSString stringWithFormat:@"%@", nameCurrentPosition];
textEvent.text = [textEvent.text stringByAppendingString:@"\n"];
textEvent.text = [textEvent.text stringByAppendingString:string];
}
-(IBAction)savePosition{
Posizione *newPosition;
newPosition = [[Position alloc]init];
if([newPosition setValue:(NSString*)fieldNomePosizione.text:(float)actualX:(float)actualY:(float)actualZ]){
//setValue is a method of Position. I'm sure that this method is correct
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Salvataggio Posizione" message:@"Posizione salvata con successo" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil];
[alert show];
[alert release];
[arrayPosition addObject:newPosition];
}
else{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Salvataggio osizione" message:@"Errore nel salvataggio" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil];
[alert show];
[alert release];
}
}
