iOS8 UIAlertView 推出頁面后，鍵盤閃一下的問題，有需要的朋友可以參考下。

iOS8以后，當(dāng)當(dāng)前界面有UITextField輸入框時(shí)，需要點(diǎn)擊確定pop到上一個(gè)頁面時(shí)，會(huì)出現(xiàn)pop界面后鍵盤出現(xiàn)又隱藏的問題，因?yàn)閕OS8的SDK中，蘋果提倡使用UIAlertController取代UIAlertView。

#define SYSTEM_VERSION [[UIDevice currentDevice].systemVersion floatValue]

if (SYSTEM_VERSION >= 8.0) {

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil ? message:@"提示文字" preferredStyle:UIAlertControllerStyleAlert];

UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

[self.navigationController popToViewController:viewController animated:YES];

}];

[alertController addAction:okAction];

[self presentViewController:alertController animated:YES completion:nil];

} else {

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"" message:@"提示文字" delegate:self cancelButtonTitle:@"確定" otherButtonTitles: nil];

[alertView show];

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- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {

?[self.navigationController popToViewController:viewController animated:YES];

}