我是Objective-c的新手,并且我的UIAlert位于如下函数内:
- (void)loadJSON
{
Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];
if (networkStatus == NotReachable) {
dispatch_async(dispatch_get_main_queue(), ^{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"Announcement" message: @"No Connection" delegate: nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [alert show]; [alert release];
});
} else {
//some code
}
}
当用户单击“确定”按钮时,应该触发该函数以调用loadJSON函数吗? (至少我是这样认为的)
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
[self loadJSON];
}
我的最终目标是,如果没有互联网连接,则显示UIAlert,用户看到消息,单击确定,如果仍然没有互联网连接,则显示警报。我已断开与互联网的连接,警报消息仅出现一次。
我的代码有问题吗?
最佳答案
没有为AlertView分配委托。
UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"Announcement"
message: @"No Connection"
delegate: self
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
关于iphone - Objective-C的UIAlert按钮不起作用,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/17666795/