UIAlertView不起作用

Question

我有两个按钮的警报视图,但按钮不打开网址.我不知道错误.请帮忙.

这是代码:

-(IBAction)showAlertView {
    UIAlertView *alert = [[UIAlertView alloc]
                          initWithTitle:@"Obrir en..."
                          message:@"Es pot requirir la aplicació de Google Maps"
                          delegate:self
                          cancelButtonTitle:@"Millor no..."
                          otherButtonTitles:@"Mapes",@"Google Maps",nil];
    [alert show];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    NSString *title = [alertView buttonTitleAtIndex:buttonIndex];

    if([title isEqualToString:@"Mapes"])
    {
        UIApplication *ourApplication = [UIApplication sharedApplication];
        NSString *ourPath = @"http://maps.apple.com/?q=Plaça+del+Rei+43003+Tarragona";
        NSURL *ourURL = [NSURL URLWithString:ourPath];
        [ourApplication openURL:ourURL]; 
    }
    if([title isEqualToString:@"Google Maps"])
    {
        UIApplication *ourApplication = [UIApplication sharedApplication];
        NSString *ourPath = @"comgooglemaps://?daddr=Plaça+del+Rei+43003+Tarragona&directionsmode=walking";
        NSURL *ourURL = [NSURL URLWithString:ourPath];
        [ourApplication openURL:ourURL];
    }
}

Answer 1

我认为地址中的特殊字符(ç)会关闭NSURL.尝试使用stringByAddingPercentEscapesUsingEncoding:NSString方法对其进行编码,然后再将其传递给NSURL初始化程序.