在今日扩展中保存和加载数据（iOS 8） [英] Save and Load Data on Today Extensions (iOS 8)

问题描述

是否可以使用NSUserDefaults在Today Extension上保存和加载数据？
关闭通知中心后，窗口小部件的行为类似于终止的应用程序，因此任何数据结果都会丢失。我怎么能解决这个问题？

Is it possible to save and load data on Today Extension using NSUserDefaults? After closing the Notification Center, the widget behaves like an app which is terminated, so any data results lost. How could I solve this issue?

这是我的代码：

NSUserDefaults *defaults;

- (void)viewDidLoad {

[super viewDidLoad];

defaults = [NSUserDefaults standardUserDefaults];
NSArray *loadStrings = [defaults stringArrayForKey:@"savedStrings"];

if ([loadStrings objectAtIndex:0] != nil) {
    [display setText:[NSString stringWithFormat:@"%@", [loadStrings objectAtIndex:0]]];
}
if ([loadStrings objectAtIndex:1] != nil) {
    calculatorMemory = [NSString stringWithFormat:@"%@", [loadStrings objectAtIndex:1]].doubleValue;
}

}


- (IBAction)saveData:(id)sender {

NSString *displayString;
NSString *memoryString;

NSArray *saveStrings = [[NSArray alloc] initWithObjects: displayString, memoryString, nil];


defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:saveStrings forKey:@"savedStrings"];
[defaults synchronize];


}

推荐答案

你需要使用app group identifier而不是com。*
例如：

You need to use app group identifier instead of com.* For instance:

NSUserDefaults *shared = [[NSUserDefaults alloc]initWithSuiteName:@"group.company.appgroup"];

存储数据时不要忘记同步

Don't forget to synchronise when you store data

[shared synchronize];

这篇关于在今日扩展中保存和加载数据（iOS 8）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！