Question

有一种观点认为,我是在UIText中设定一种手法价值。当我改变看法时,我希望把这一价值显示为“国际劳工联合会”。我知道如何在一种观点中担任控制者,而不是两个观点之间。我曾试图在称为“全球”的头号档案中确定红 code法的价值,然后回顾,但总是坠毁。这里有一些编码样本:

这是全球文件。

#import <Foundation/Foundation.h>

@interface globals 

extern NSString *zipCodeValue;

@end

这是全球文件:

#import "globals.h"

@implementation globals

NSString *zipCodeValue = @"default value";

@end

这是第一种观点(在案文领域加入正文法)。接口和执行:

#import <UIKit/UIKit.h>


@interface ZipCodeEntryViewController : UIViewController <UITextFieldDelegate> {
    UITextField *zipCode;
    UIButton *doneButton;
}
@property (nonatomic, retain) IBOutlet UITextField *zipCode;
@property (nonatomic, retain) IBOutlet UIButton *doneButton;

-(IBAction) tapBackground:(id)sender;
-(IBAction) doneButtonClick:(id)doneButton;

@end

#import "ZipCodeEntryViewController.h"
#import "MillersAppAppDelegate.h"
#import "AddressViewController.h"
#import "globals.h"
#define MAX_LENGTH 5

@implementation ZipCodeEntryViewController
@synthesize zipCode, doneButton;

-(IBAction) doneButtonClick:(id)doneButton{
    MillersAppAppDelegate *delegate = (MillersAppAppDelegate *)[[UIApplication     sharedApplication] delegate];
    AddressViewController *addressView = [[AddressViewController     alloc]initWithNibName:@"AddressViewController" bundle:nil];
    [delegate switchViews:self.view toView:addressView.view];
    //using the global string to store the text field content
    zipCodeValue=zipCode.text;
    //the button is clicked and the view changes to addressView while NSLogging the correct value. So far, so good.
    NSLog(@"%@", zipCodeValue); 
    [addressView release];
}

-(IBAction) tapBackground:(id)sender{
    [zipCode resignFirstResponder];
}

因此,此时此刻,所有事情都看上去了(它正确指出)。我假定不断变数的日冕堂纽埃现在将继续保留其固定价值,即使观点控制者已经改变。当我试图在新的观点控制人(书记长)中适用时,它就没有标签。这是我使用的方法(我把它命名在标题档案中;ZpCodeEntry是我称之为初始化并与“Interface Buildinger”目标相联系的IDLabel):

-(void)setZipCode{
zipCodeEntry.text=zipCodeValue;
}

I am now thoroughly confused, I have reason to believe my brain is missing something since I m new to this. Sorry if this is long-winded, I didn t want to leave anything out. I m clearly a beginner. AGGGG!!!

Answer 1

利用NSUserDefaults:

NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
[ud setObject:zipCodeValue forKey:@"myKey"];
[ud synchronize];

And to load it:

NSString *a = [ud objectForKey:@"myKey"];

你们可以在你们的心目中装满和拯救它。

友情链接