我正在解决这个问题，MBProgressHUD 应该使用 Checkmark/X 更新其视图以获取成功/失败的请求。不知何故，这并没有真正按预期工作，并且更新仅在所有代码执行后才有效。
初始化 HUD
...
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
hud.labelText = @"Verifying Credit Card";
_HUD = hud;
CWAPIClient *client = [CWAPIClient sharedClient];
client.delegate = self;
dispatch_queue_t backgroundQueue = dispatch_queue_create("com.clubw.billing", 0);
dispatch_async(backgroundQueue, ^{
[client save:billingProfile with:[Address defaultBillingAddress]];
});
....
回调处理信息：
self POST:[NSString stringWithFormat:@"user/%@/billingprofile", [[Profile defaultProfile] userId]] parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
dispatch_async(dispatch_get_main_queue(), ^{
[self.delegate CWAPIClient:self doneVerifyingCreditCard:responseObject];
});
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"%@", error);
}];
动作完成时回调
BOOL success = [[jsonResponse objectForKey:@"success"] boolValue];
if (success)
{
NSLog(@"Thread: %@", [NSThread currentThread]);
dispatch_async(dispatch_get_main_queue(), ^{
UIImage *checkmarkImage = [UIImage imageNamed:@"checkmark.png"];
UIImageView *checkmarkView = [[UIImageView alloc] initWithImage:checkmarkImage];
_HUD.customView = checkmarkView;
_HUD.labelText = @"Credit Card Verified!";
_HUD.mode = MBProgressHUDModeCustomView;
NSLog(@"Thread: %@", [NSThread currentThread]);
sleep(5);
[_HUD hide:YES];
});
5 秒后，它简单地关闭了 HUD - 更新的 HUD 闪烁一秒钟。看起来，这是一个线程问题 - 但我似乎无法弄清楚它在哪里抛出。