我想发出“无互联网连接警报”。基本上是在没有互联网连接时出现的警报。我尝试过使用可达性,但我没有弄清楚任何事情。这是我的视图控制器:
这是我的 .h 文件:P.S:我的 WebView 称为“webone”。
#import <UIKit/UIKit.h>
@interface FirstViewController : UIViewController
-(IBAction)refreshClicks:(id)sender;
@property (weak, nonatomic) IBOutlet UIWebView *webone;
@end
这是我的 .m 文件:
#import "FirstViewController.h"
@interface FirstViewController ()
@end
@implementation FirstViewController
@synthesize webone;
-(void)viewDidLoad {
NSURL *url = [NSURL URLWithString:@"http://www.lostcraft.net/mobile"];
NSURLRequest *req = [NSURLRequest requestWithURL:url];
[webone loadRequest:req];
[super viewDidLoad];
}
-(void)awakeFromNib{ //IGNORE
[self refreshClicks:self]; //IGNORE
}
-(IBAction)refreshClicks:(id)sender{//IGNORE
[webone loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.lostcraft.net/mobile"]]];//IGNORE
}
- (void)viewDidUnload
{
[self setWebone:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
} else {
return YES;
}
}
将其放入您的 .m 文件中
根据您的 IBA 行动:
NSString *web = @"http://YOUR WEB ADRESS HERE";
NSURL *url = [NSURL URLWithString:web];
NSURLRequest *requestUrl = [NSURLRequest requestWithURL:url];
[webdone loadRequest:requestUrl];
然后在你的.m中的某个地方
-(void)webView:(UIWebView *)webdone didFailLoadWithError:(NSError *)error {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Please check your internet connection" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
}
进入 xcode 中的界面生成器中的连接选项卡
右键单击委托,如图所示(顶部选项),然后将其拖动到您拥有网络视图的视图控制器(webdone)