iOS xcode按钮未链接。

Question

I have a one button on my main storyboard. I'm pretty sure it's linked up correctly but when I run the simulator and hit the button, it does nothing. What am I missing to get the button to open Safari?

Viewcontroller.h

#import <UIKit/UIKit.h>

@interface testViewController : UIViewController
- (IBAction)openSafari:(id)sender;

@end

Viewcontroller.m

#import "testViewController.h"

@interface testViewController ()

@end

@implementation testViewController

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

- (IBAction)openSafari:(id)sender {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"www.google.com"]];
}
@end

Answer 1

A URL needs a method as well as an address, so try @"http://www.google.com". To prove whether your action is hooked up right, print a log message from the method (or use a breakpoint).