Ios 添加到以前保存的NSUserDefault
我正在为iOS制作一个游戏,在每个关卡中都有一个计分系统。这里我有一些代码,它通过使用委托获取Ios 添加到以前保存的NSUserDefault,ios,objective-c,delegates,nsuserdefaults,Ios,Objective C,Delegates,Nsuserdefaults,我正在为iOS制作一个游戏,在每个关卡中都有一个计分系统。这里我有一些代码,它通过使用委托获取NSString(passedValue1) 以下是代表的代码: LevelCompleteLevel1 .h #import "ViewController.h" @interface LevelCompleteLevel1 : UIViewController{ IBOutlet UILabel *label; ViewController *secondviewData; } @propert
NSString
(passedValue1
)
以下是代表的代码:
LevelCompleteLevel1
.h
#import "ViewController.h"
@interface LevelCompleteLevel1 : UIViewController{
IBOutlet UILabel *label;
ViewController *secondviewData;
}
@property (nonatomic, retain)ViewController*secondviewData;
@interface ViewController : UIViewController{
IBOutlet UILabel *label;
NSString *passedValue1;
}
@property (nonatomic, retain)NSString *passedValue1;
@end
.m
ViewController *second = [[ViewController alloc] initWithNibName:nil bundle:nil];
self.secondviewData = second;
secondviewData.passedValue1 = label.text;
[self presentModalViewController:second animated:YES];
在.m
中,我将a值从当前视图控制器中的标签发送到另一个视图控制器
中,我发送的值称为passedValue1
发送完值后,我需要在我的ViewController
ViewController
.h
#import "ViewController.h"
@interface LevelCompleteLevel1 : UIViewController{
IBOutlet UILabel *label;
ViewController *secondviewData;
}
@property (nonatomic, retain)ViewController*secondviewData;
@interface ViewController : UIViewController{
IBOutlet UILabel *label;
NSString *passedValue1;
}
@property (nonatomic, retain)NSString *passedValue1;
@end
.m
ViewController *second = [[ViewController alloc] initWithNibName:nil bundle:nil];
self.secondviewData = second;
secondviewData.passedValue1 = label.text;
[self presentModalViewController:second animated:YES];
首先我<代码>@passedValue1代码>
然后我添加代码以接收myviewDidLoad
中的值,并在UILabel
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib
NSString *key=@"labelKey";
// Do any additional setup after loading the view, typically from a nib
if(passedValue1){
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSObject * object = [prefs objectForKey:key];
if(object != nil){
NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];
[defults setObject:passedValue1 forKey:key];
[defults synchronize];
}
else{
NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];
NSInteger readScore=[[[NSUserDefaults standardUserDefaults] objectForKey:key] integerValue];
NSInteger newValue=readScore+[passedValue1 integerValue];
[defults setObject:[NSString stringWithFormat:@"%d",newValue] forKey:key];
[defults synchronize];
}
}
label.text = [[NSUserDefaults standardUserDefaults]objectForKey:key];
}
显示值后,使用NSUserDefault
将其保存到标签中。但是,一旦我重播了我的游戏并获得了另一个分数值,我想将新的passedValue1
值添加到当前保存的值中
例如:
假设我发挥我的水平,我得到的分数值为10。然后保存该值,然后我重播我的级别。然后,我想获取保存的值,并将其添加到我刚刚获得的值中。也就是说,我得到的第二个值是20。然后我希望我的代码将它们相加,并给我一个值30
任何人都可以帮助我,因为我使用的代码没有正确执行我想要执行的功能,即添加上一个和当前传递的值
提前谢谢
编辑
Iam使用此代码:
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib
NSString *key=@"labelKey";
// Do any additional setup after loading the view, typically from a nib
if(passedValue1){
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSObject * object = [prefs objectForKey:key];
if(object != nil){
NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];
[defults setObject:passedValue1 forKey:key];
[defults synchronize];
}
else{
NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];
NSInteger readScore=[[[NSUserDefaults standardUserDefaults] objectForKey:key] integerValue];
NSInteger newValue=readScore+[passedValue1 integerValue];
[defults setValue:[NSString stringWithFormat:@"%d",newValue] forKey:key];
[defults synchronize];
}
}
label.text = [[NSUserDefaults standardUserDefaults]objectForKey:key];
}
为什么这不起作用,标签的显示值是最初传递的值1?两件事
在添加NSString时,使用setValue:forKey:
方法就足够了。(不是setObject:forKey,因为您正在使用)
NSUserDefaults
是一种基于键的值保存机制。如果尝试将值保存在同一个键中,则保存的值将替换为当前保存的值
因此,在您的情况下,只需使用新值调用同一个键,旧值就会被新值替换。尝试此键后
NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
[defaults setObject:@"10" forKey:@"old value"];
[defaults synchronize];
int k=[[defaults objectForKey:@"old value"] intValue]+newValue;
尝试使用setValue而不是setObject。您现在的问题是什么?获取此值secondviewData.passedValue1=label.text;(passedValue1)r没有?你能检查我的编辑并告诉我我做错了什么吗。谢谢你检查我的编辑,告诉我我做错了什么。谢谢你检查我的编辑,告诉我我做错了什么。谢谢