xcode UIAlertView 与 UIAlertController - iOS 8 中没有键盘
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/26074475/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
UIAlertView Vs UIAlertController - no keyboard in iOS 8
提问by Sam B
I have a old Xcode project that is targeted for iOS 6 and higher. I recently opened it up in Xcode 6 and ran in iPhone 6 simulator for iOS 8. When I tried this action
我有一个针对 iOS 6 及更高版本的旧 Xcode 项目。我最近在 Xcode 6 中打开它并在 iOS 8 的 iPhone 6 模拟器中运行。当我尝试这个动作时
UIAlertView* dialog = [[UIAlertView alloc] initWithTitle:@"Enter Folder Name"
message:@"Keep it short and sweet"
delegate:self
cancelButtonTitle:@"Cancel"
otherButtonTitles:@"OK", nil];
dialog.alertViewStyle = UIAlertViewStylePlainTextInput;
dialog.tag = 400;
[dialog show];
I get a pop-up window but when I click on the text field, no keyboard comes up. I googled and read that I need to use UIAlertController instead. Since I need to support iOS 6, 7 versions as well so I changed my code like this.
我得到一个弹出窗口，但是当我单击文本字段时，没有键盘出现。我用谷歌搜索并读到我需要使用 UIAlertController 代替。由于我还需要支持 iOS 6、7 版本，所以我像这样更改了我的代码。
if ([UIAlertController class])
{
// use UIAlertController
UIAlertController *alert= [UIAlertController
alertControllerWithTitle:@"Enter Folder Name"
message:@"Keep it short and sweet"
preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action){
//Do Some action here
UITextField *textField = alert.textFields[0];
NSLog(@"text was %@", textField.text);
}];
UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action) {
NSLog(@"cancel btn");
[alert dismissViewControllerAnimated:YES completion:nil];
}];
[alert addAction:ok];
[alert addAction:cancel];
[alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = @"folder name";
textField.keyboardType = UIKeyboardTypeDefault;
}];
[self presentViewController:alert animated:YES completion:nil];
}
else
{
// use UIAlertView
UIAlertView* dialog = [[UIAlertView alloc] initWithTitle:@"Enter Folder Name"
message:@"Keep it short and sweet"
delegate:self
cancelButtonTitle:@"Cancel"
otherButtonTitles:@"OK", nil];
dialog.alertViewStyle = UIAlertViewStylePlainTextInput;
dialog.tag = 400;
[dialog show];
}
Again if I try the same action NO keyboardis displayed.
同样，如果我尝试相同的操作，则不会显示键盘。
Is this a bug in Xcode 6 simulator or I am doing something wrong?
这是 Xcode 6 模拟器中的错误还是我做错了什么？
回答by Bhumit Mehta
I Tested this, if iOS8 detects a hardware keyboard , than it does not open the keypad. As you might be testing in simulator , so it is not Showing any keypad
我对此进行了测试，如果 iOS8 检测到硬件键盘，则不会打开键盘。由于您可能正在模拟器中进行测试，因此它没有显示任何键盘
Press "Command" + "k" and you should be able to see the keypad.
按“Command”+“k”，您应该能够看到键盘。
When testing on a device you will not face this issue , unless user has connected his device with a hardware Bluetooth keypad , so this is not something you should worry about
在设备上进行测试时，您不会遇到此问题，除非用户已将其设备与硬件蓝牙键盘连接，因此您无需担心。
Hope this helps
希望这可以帮助
回答by voghDev
Another way of seeing the keyboard is setting a keyboard type. This could be an example code:
查看键盘的另一种方式是设置键盘类型。这可能是一个示例代码：
UIAlertController* alertController = [UIAlertController
alertControllerWithTitle:@"Test"
message:@"Testing keyboard"
preferredStyle:UIAlertControllerStyleAlert];
[alertController addTextFieldWithConfigurationHandler: ^(UITextField *tf)
{
tf.autocorrectionType = UITextAutocorrectionTypeYes;
tf.keyboardType = UIKeyboardTypeDefault;
}];
[self presentViewController:alertController animated:YES completion:nil];
Then you will see simulator's keyboard when you show the AlertController
然后当你显示 AlertController 时你会看到模拟器的键盘
