Question

我有一个向服务提交表单数据的按钮。当用户点击它时，它会提交数据并提醒成功。我想在其中添加活动指示器，当用户点击按钮提交活动指示器应该移动时提交数据所需的时间，而不是在提交数据时隐藏。我很困惑我应该在哪里使用它代码，我很困惑，是否应该在回复后或其他任何地方打电话。我的代码是，

 NSString *post = [NSString stringWithFormat:@"propertyfor=%@&propertytype=%@&landarea=%@&country=%@&city=%@&price=%@&description=%@&location=%@&name=%@&email=%@&phone=%@",_propertyfor,_propertytype,_landarea,_country,_city,_price,_propdes,_propdescrip,self.name.text,self.email.text,phone];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:@"My URL"]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:postData];

NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
[[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
    NSLog(@"requestReply: %@", requestReply);
}] resume];

Answer 1

     **//Start Activity Indicator here.**
    NSString *post = [NSString stringWithFormat:@"propertyfor=%@&propertytype=%@&landarea=%@&country=%@&city=%@&price=%@&description=%@&location=%@&name=%@&email=%@&phone=%@",_propertyfor,_propertytype,_landarea,_country,_city,_price,_propdes,_propdescrip,self.name.text,self.email.text,phone];
    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
    NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
    [request setURL:[NSURL URLWithString:@"My URL"]];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setHTTPBody:postData];

    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    [[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
     **//Stop Activity Indicator here.**
        NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
        NSLog(@"requestReply: %@", requestReply);
    }] resume];

Answer 2

您需要在创建会话之前开始制作动画，并停止动画制作您获得回复的动画。在您的代码中：

     .
     .
     .
     .
    [activity startAnimating];

    NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    [[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
        NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
       dispatch_async(dispatch_get_main_queue(), ^{
                [activity stopAnimating];
       });
        NSLog(@"requestReply: %@", requestReply);
    }] resume];

Answer 3

将followind代码替换为原始代码：

CGSize s1 = UIApplication.sharedApplication.windows[0].frame.size;
CGRect r1 = CGRectMake(s1.width/2-20, s1.height/2-20, 40, 40);
UIActivityIndicatorView *act = [[UIActivityIndicatorView alloc]initWithFrame:r1];
[self.view addSubview:act];
[act startAnimating];
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
[[session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    NSString *requestReply = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
    NSLog(@"requestReply: %@", requestReply);
    [act stopAnimating];
    [act removeFromSuperview];
}] resume];

在IOS上单击按钮上的活动指示器

3 个答案: