ios – UI在执行NSBatchDeleteRequest时冻结

概述NSFetchRequest *request = [Report fetchRequest];request.predicate = [NSPredicate predicateWithFormat: @"reportId IN %@",self.selectedRowsInEditMode];NSBatchDeleteRequest *deleteDetailsRequest = [[N

NSFetchRequest *request = [Report fetchRequest];request.predicate = [nspredicate predicateWithFormat: @"reportID IN %@",self.selectedRowsInEditMode];NSBatchDeleteRequest *deleteDetailsRequest = [[NSBatchDeleteRequest alloc] initWithFetchRequest:request];deleteDetailsRequest.resultType = NSBatchDeleteResultTypestatusOnly;[self.managedobjectContext executeRequest:deleteDetailsRequest error:&errorExecuteRequest];if (!errorExecuteRequest) {    NSError *deleteSaveError;    BOol saveSuccessful = [self.managedobjectContext save:&deleteSaveError];    [self.tableVIEw removeLoadingActivityVIEw];

这是我尝试一次删除多个报表管理对象的代码,但是当调用executeRequest时,UI会冻结很长一段时间然后删除.但就删除而言,NSBatchDeleteRequest应该非常快.我尝试了多次修改以使其正常工作但没有成功.
我不确定我在这里做错了什么.所以任何人都可以建议让它在没有UI故障的情况下工作.

解决方法 希望对您有所帮助！

我最后添加了以下内容,以便在批量删除后处理上下文.

[self.managedobjectContext refreshAllObjects];// Initialize Fetch RequestNSFetchRequest *fetchRequest = [Report fetchRequest];// Add Sort DescriptorsfetchRequest.predicate = [nspredicate predicateWithFormat: @"reportID IN %@",self.selectedRowsInEditMode];// Initialize Asynchronous Fetch RequestNSAsynchronousFetchRequest *asynchronousFetchRequest = [[NSAsynchronousFetchRequest alloc] initWithFetchRequest:fetchRequest completionBlock:^(NSAsynchronousFetchResult *result) {    dispatch_async(dispatch_get_main_queue(),^{        // Process Asynchronous Fetch Result        [weakSelf processAsynchronousFetchResult:result];    });}];// Execute Asynchronous Fetch Request[self.managedobjectContext performBlock:^{    // Execute Asynchronous Fetch Request    NSError *asynchronousFetchRequestError = nil;    NSAsynchronousFetchResult *asynchronousFetchResult = (NSAsynchronousFetchResult *)[weakSelf.managedobjectContext executeRequest:asynchronousFetchRequest error:&asynchronousFetchRequestError];    if (asynchronousFetchRequestError) {        NSLog(@"Unable to execute asynchronous fetch result.");        NSLog(@"%@,%@",asynchronousFetchRequestError,asynchronousFetchRequestError.localizedDescription);    }}];

或者在下面使用全局队列来运行后台和主队列以更新UI

dispatch_async(dispatch_get_global_queue( disPATCH_QUEUE_PRIORITY_DEFAulT,0),^(voID){    //Background Thread    dispatch_async(dispatch_get_main_queue(),^(voID){        //Run UI Updates    });});

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