NSUserDefaults standardUserDefaults setObject:forKey:不适用于多值首选项 [英] NSUserDefaults standardUserDefaults setObject: forKey: not working for Multivalue preference
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问题描述
我正在尝试执行以下任务
I am trying to do following task
[[NSUserDefaults standardUserDefaults] setObject:@"Dry" forKey:@"vesselType_preference"];
[[NSUserDefaults standardUserDefaults] synchronize];
我的"vesselType_preference"是多值属性,但是没有生效.请帮助这适用于其他类型的属性,但不适用于多值类型.
where my "vesselType_preference" is multivalue attribute, but it is not getting effected. Please help this is working for other type of attribute but not working for multivalue type.
谢谢
推荐答案
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if (![defaults objectForKey:@"vesselType_preference"])
{
[defaults setObject:@"Dry" forKey:@"vesselType_preference"];
}
[[NSUserDefaults standardUserDefaults] synchronize];
这应该有效.
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