ios - 写入 PFInstallation

Question

我正在尝试将 BOOL 值写入 PFInstallation 中的列，但会不停地崩溃:

- (IBAction)pushSwitch:(id)sender {
NSUserDefaults *pushlocationStatus = [NSUserDefaults standardUserDefaults];

if (self.pushSwitch.on) {
    [pushlocationStatus setBool:YES forKey:@"pushlocationStatus"];

    PFQuery *query = [PFInstallation query];
    [query whereKey:@"objectId" equalTo:[PFInstallation currentInstallation].objectId];
    [query getFirstObjectInBackgroundWithBlock:^(PFObject *pushlocationObject, NSError *error) {
        pushlocationObject[@"locationPref"] = @YES;
        [pushlocationObject saveInBackground]; 
    }];
} else {
    [pushlocationStatus setBool:NO forKey:@"pushlocationStatus"];

    PFQuery *query = [PFInstallation query];
    [query whereKey:@"objectId" equalTo:[PFInstallation currentInstallation].objectId];
    [query getFirstObjectInBackgroundWithBlock:^(PFObject *pushlocationObject, NSError *error) {
        pushlocationObject[@"locationPref"] = @NO;
        [pushlocationObject saveInBackground];     
    }];
}
}

关于如何修复崩溃的任何建议:

我需要在 PFInstallation 中更新它，因为不是每个人都需要注册才能使用我的服务，但是，我希望能够不向这些选择不接收它的人发送推送。

Answer 1

好的。对于其他有同样问题的人，可以直接写入您的安装类，我从不怀疑这是一个问题，我仍然没有想出如何直接查询类，但现在要解决一个问题写入您的 Installation 类很简单......只是不要查询它，只需写入它即可。这是我用来修复我的 if 语句的方法:

- (IBAction)pushSwitch:(id)sender {
NSUserDefaults *pushlocationStatus = [NSUserDefaults standardUserDefaults];

if (self.pushSwitch.on) {
    [pushlocationStatus setBool:YES forKey:@"pushlocationStatus"];

    PFInstallation *installation = [PFInstallation currentInstallation];
    [installation setObject:@YES forKey:@"locationPref"];
    [installation saveInBackground];

} else {
    [pushlocationStatus setBool:NO forKey:@"pushlocationStatus"];

    PFInstallation *installation = [PFInstallation currentInstallation];
    [installation setObject:@NO forKey:@"locationPref"];
    [installation saveInBackground];
}
}

这只是一个例子。这对自定义分割的推送通知选项有很大帮助。