I'm loading a bunch of files through Alamofire requests. I want to show a "loading…" spinner (MBProgressHUD) while they load.
我正在通过Alamofire请求加载一堆文件。我想在加载时显示“loading ...”微调器（MBProgressHUD）。
But I'm having some trouble determining when all the requests have finished, so that I can hide the HUD at the correct time!
但是我在确定所有请求何时完成时遇到了一些麻烦，因此我可以在正确的时间隐藏HUD！
So far, everything I've tried has resulted in the hud being hidden too early, or never at all. Currently, I have my requests wrapped in an NSOperation subclass, with a simple NSBlockOperation to hide the hud, which has all the Alamofire request operations as dependencies. But I can't figure out how to get the requests to be marked as finished at the right time.
到目前为止，我尝试过的所有事情都导致过早隐藏，或者根本不隐藏。目前，我的请求包含在NSOperation子类中，使用简单的NSBlockOperation来隐藏hud，它将所有Alamofire请求操作都作为依赖项。但我无法弄清楚如何在正确的时间将请求标记为已完成。
Ideally I'd like to find a solution that's simpler than this. What would be the best way to accomplish this? Thanks.
理想情况下，我想找到一个比这更简单的解决方案。实现这一目标的最佳方法是什么？谢谢。
1 个解决方案
#1
2
use disptach_group_t Here is Example
使用disptach_group_t这是示例
dispatch_group_t group = dispatch_group_create();
__weak MainViewControllerSupplier * weakSelf = self;
dispatch_group_enter(group);
[self showHUD];
[[DataManager sharedManager] getCategoriesWithSuccessBlock:^(NSArray *categories) {
weakSelf.arrCategories = categories;
dispatch_group_leave(group);
// NSLog(@"response category= %@",categories);
} failureBlock:^(NSError *error) {
NSLog(@"response category = %@",error);
dispatch_group_leave(group);
}];
dispatch_group_enter(group);
[[DataManager sharedManager] getRegionsWithSuccessBlock:^(NSArray *regions) {
weakSelf.arrRegions = regions;
dispatch_group_leave(group);
} failureBlock:^(id error) {
NSLog(@"response region = %@",error);
dispatch_group_leave(group);
}];
dispatch_group_notify(group, dispatch_get_main_queue(), ^{
dispatch_async(dispatch_get_main_queue(), ^{
[self hideHUD];
});
// All task completed
});
#1
2
use disptach_group_t Here is Example
使用disptach_group_t这是示例
dispatch_group_t group = dispatch_group_create();
__weak MainViewControllerSupplier * weakSelf = self;
dispatch_group_enter(group);
[self showHUD];
[[DataManager sharedManager] getCategoriesWithSuccessBlock:^(NSArray *categories) {
weakSelf.arrCategories = categories;
dispatch_group_leave(group);
// NSLog(@"response category= %@",categories);
} failureBlock:^(NSError *error) {
NSLog(@"response category = %@",error);
dispatch_group_leave(group);
}];
dispatch_group_enter(group);
[[DataManager sharedManager] getRegionsWithSuccessBlock:^(NSArray *regions) {
weakSelf.arrRegions = regions;
dispatch_group_leave(group);
} failureBlock:^(id error) {
NSLog(@"response region = %@",error);
dispatch_group_leave(group);
}];
dispatch_group_notify(group, dispatch_get_main_queue(), ^{
dispatch_async(dispatch_get_main_queue(), ^{
[self hideHUD];
});
// All task completed
});