本文介绍了无法将频道保存到PFInstallation(iOS)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试添加/删除PFInstallation中的频道,但我一直收到相同的错误消息:
I'm trying to add / remove channels from PFInstallation but I keep getting the same error message:
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Operation is invalid after previous operation.'
我的代码:
NSString * channel=[NSString stringWithFormat:@"%@%@%@", city, @"_", self.titleLabel.text];
PFInstallation *currentInstallation = [PFInstallation currentInstallation];
if([sender isOn]){
[currentInstallation addUniqueObject:channel forKey:@"channels"];
} else{
[currentInstallation removeObject:channel forKey:@"channels"];
}
[currentInstallation saveInBackground];
推荐答案
addUniqueObject方法有一个错误,当频道是零。
你应该在它之前加上它。
There is a bug in addUniqueObject method, when channels is nil.You should add this before it.
if (currentInstallation.channels == nil)
{
currentInstallation.channels = [[NSArray alloc] init];
}
此外,你应该使用saveEventually而不是saveInBackGround。
Also, you should use saveEventually instead of saveInBackGround.
这应该是SDK中的错误。
This should be a bug in SDK.
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