问题描述
public function update($id){
$item = Item::find($id);
$statistic_id = 1;
// to add
$item->statistics()->attach($statistic_id,[
'min' => 5,'max' => 10,'mandatory' => true
]);
// to update
$item->statistics()->updateExistingPivot($statistic_id,'mandatory' => true
]);
}
我已经清理并重新启动了Xcode,还重新启动了iPhone和Macbook。没有任何帮助。我如何在这里清除它?
编辑
我已经打印了一些进度属性信息:
resourceRequest = NSBundleResourceRequest(tags: Set(["preview"]))
resourceRequest?.beginAccessingResources { [weak self] downloaded in //not called
// here I do what I need with this and at the end I call
// self?.resourceRequest?.endAccessingResources()
}
但是当我打电话给print(resourceRequest?.progress.isCancelled) //false
print(resourceRequest?.progress.isPaused) //false
print(resourceRequest?.progress.isFinished) //false
print(resourceRequest?.progress.isIndeterminate) //false
print(resourceRequest?.progress.localizedDescription) //0% completed
print(resourceRequest?.progress.isCancellable) //true
时,什么都没有改变...
如何拒绝,取消或恢复该请求?
打印进度时,我有:
cancel()
解决方法
希望您已经检查了此注意事项
您必须先访问此方法或有条件地调用BeginAccessingResources(completionHandler :),然后再访问由请求管理的标记所标记的任何资源。
func conditionallyBeginAccessingResources(completionHandler: @escaping (Bool) -> Void)
如苹果建议在链接下方的复选标记之前做的
,设备上的磁盘是否有可能已满? The documentation提供了一个方便的小片段,用于注册通知并进行检查。
在此处复制
清单4-11注册NSBundleResourceRequestLowDiskSpaceNotification通知
// Register to call self.lowDiskSpace when the notification occurs
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(lowDiskSpace:)
name:NSBundleResourceRequestLowDiskSpaceNotification
object:nil
];
// Notification handler for low disk space warning
-(void)lowDiskSpace:(NSNotification*)theNotification
{
// Free the lower priority resource requests
for (NSBundleResourceRequest *atRequest in self.lowPriorityRequests) {
// End accessing the resources
[atRequest endAccessingResources];
}
// clear lowPriorityRequests preventing multiple calls to endAccesingResource
[self.lowPriorityRequests removeAllObjects];
}