Ios 带有UIAlertView的接点注释
我在“底部栏”中创建了一个按钮。当用户按下按钮时,我试图显示UIAlertView,以便用户可以输入一个地址,从而在地图上显示一个蓝色pin。然后应将该pin保存为NSUserDefault,以便每次重新启动应用程序时都保存该位置 这是我到目前为止所拥有的。用户可以在UIAlertView中输入地址,但不会发生任何事情Ios 带有UIAlertView的接点注释,ios,uialertview,Ios,Uialertview,我在“底部栏”中创建了一个按钮。当用户按下按钮时,我试图显示UIAlertView,以便用户可以输入一个地址,从而在地图上显示一个蓝色pin。然后应将该pin保存为NSUserDefault,以便每次重新启动应用程序时都保存该位置 这是我到目前为止所拥有的。用户可以在UIAlertView中输入地址,但不会发生任何事情 - (IBAction)selectHq:(UIBarButtonItem *)sender { UIAlertView *alert = [[UIAlertView
- (IBAction)selectHq:(UIBarButtonItem *)sender
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Select Headquarters"
message:@"Enter Address"
delegate:self
cancelButtonTitle:@"Cancel"
otherButtonTitles:@"Ok", nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
[[alert textFieldAtIndex:0] setKeyboardType:UIKeyboardTypeNumbersAndPunctuation];
[alert show];
UITextField *field = [alert textFieldAtIndex:0];
field.placeholder = @"Enter HQ Address";
if (!self.geocoder)
{
self.geocoder = [[CLGeocoder alloc] init];
}
NSString *hqAddress = [NSString stringWithFormat:@"%@", field.text];
[self.geocoder geocodeAddressString:hqAddress completionHandler:^(NSArray *placemarks, NSError *error) {
if ([placemarks count] > 0)
{
CLPlacemark *placemark = [placemarks objectAtIndex:0];
CLLocation *location = placemark.location;
CLLocationCoordinate2D hqCoordinate = location.coordinate;
NSLog (@"%f %f", hqCoordinate.latitude, hqCoordinate.longitude);
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta = 0.01;
span.longitudeDelta = 0.01;
region.span = span;
region.center = hqCoordinate;
MKPointAnnotation *hqAnnotation = [[MKPointAnnotation alloc] init];
[hqAnnotation setCoordinate:hqCoordinate];
[hqAnnotation setTitle:@"HQ"];
[[self mapView] addAnnotation:hqAnnotation];
[self.mapView setRegion:region animated:TRUE];
[self.mapView regionThatFits:region];
}
}];
[[NSUserDefaults standardUserDefaults] setObject:field.text forKey:HQ_KEY];
[[NSUserDefaults standardUserDefaults] synchronize];
您应该实现
UIAlertViewDelegate
,并将警报按钮选择的操作代码放入delegate方法中
- (IBAction)selectHq:(UIBarButtonItem *)sender
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Select Headquarters"
message:@"Enter Address"
delegate:self
cancelButtonTitle:@"Cancel"
otherButtonTitles:@"Ok", nil];
alert.alertViewStyle = UIAlertViewStylePlainTextInput;
[[alert textFieldAtIndex:0] setKeyboardType:UIKeyboardTypeNumbersAndPunctuation];
[alert show];
[alert release] // if non-arc project.
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
// add your code here for tagging the map
// saving to nsuserdefaults.
}
它正在工作。别针是紫色的。“我怎样才能把别针的颜色改成蓝色?”乔治·弗雷迪看着。这可能对你有帮助。