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我有一個TableViewController與一些項目，然後有一個filterViewController，其中篩選數據根據值TableViewController。它是用UISwitch製成的。無論如何，我想問一下，如何添加一個SVProgressHUD到動作，當我從filterViewController返回過濾數組。它需要幾秒鐘過濾並在tableView中顯示它們。我已經嘗試過dispatch_async，甚至不顯示HUD。我有一個在filterViewController中的按鈕的IBAction來確認值並將它們發送到TableViewController。SVProgressHUD如何顯示在下一個ViewController
如果我將HUD添加到filterViewController中的操作中，HUD不會顯示在TableViewController中。
filterViewController.m
-(IBAction)Done:(id)sender{
[self willMoveToParentViewController:nil];
[self.navigationController popViewControllerAnimated:YES];
}
TableViewController.m
- (void)filterController:(filterViewController *)controller didEditConfig:(NSMutableDictionary *)config
{
[SVProgressHUD showWithMaskType:SVProgressHUDMaskTypeGradient];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// time-consuming task
self.konfigg = config;
NSSet *filter = [config keysOfEntriesPassingTest:
^BOOL (id key, NSNumber *value, BOOL *stop) {
return [value boolValue];
}];
NSLog(@"filtered keys: %@ (%lu of %lu)", filter, (unsigned long)filter.count, (unsigned long)config.count);
PFQuery *query = [PFQuery queryWithClassName:@"Class"];
[query addDescendingOrder:@"createdAt"];
[query whereKey:@"eventDay" containedIn:[filter allObjects]];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
self.itemss = [objects mutableCopy];
[self.MainTable reloadData];
NSLog(@"Got filtered results %@ (%lu)", objects, (unsigned long)objects.count);
}}
];
dispatch_async(dispatch_get_main_queue(), ^{
[SVProgressHUD dismiss];
});
});
}