Question

I have an app with 4 UIButtons and I want to pre-program phone numbers to each of them. I have written it like this:

- (IBAction)callFirst:(id)sender {
[NSURL URLWithString:@"tel.[phone]"];
}

- (IBAction)callSecond:(id)sender {
[NSURL URLWithString:@"tel.[phone]"];
}

- (IBAction)callThird:(id)sender {
[NSURL URLWithString:@"tel.[phone]"];
}

- (IBAction)callFourth:(id)sender {
[NSURL URLWithString:@"tel.[phone]"];
}

When I just open the app on the simulator it takes me to the log and shows errors. How should I write it instead?
This is what comes up when I run it. The “return UIApplicationMain… ” part is marked with green arrows on its edges. On the right it says ” Thread 1: signal sigabrt” Its from the main.m file:

#import <UIKit/UIKit.h>

#import "AppDelegate.h"

int main(int argc, char *argv[])
{
@autoreleasepool {
    return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}

thanks in advance!

Answer 1

1. You didn’t open the url
2. you used the wrong url scheme

something like this should work:

- (BOOL)callPhoneNumberWithString:(NSString *)phoneNumberString {
    NSURL *url = [NSURL URLWithString:phoneNumberString];
    if ([[UIApplication sharedApplication] canOpenURL:url]) {
        [[UIApplication sharedApplication] openURL:url];
        return YES;
    }
    return NO;
}

- (IBAction)callFirst:(id)sender {
    [self callPhoneNumberWithString:@"tel:[phone]"]; 
}