UIAlertView for iOS 9的替代scheme？
UAlertView在iOS 9及更高版本中已弃用。 什么是替代？
UIAlertView *new = [[UIAlertView alloc] initWithTitle:@"Success" message:@"Your InApp Purchases were successfully restored" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; [new show];
您可以使用此代码来replace警报视图：
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert]; [alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:nil]]; [self presentViewController:alertController animated:YES completion:nil];
如果您需要多个操作，您可以使用：
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Title" message:@"Message" preferredStyle:UIAlertControllerStyleAlert]; [alertController addAction:[UIAlertAction actionWithTitle:@"Button 1" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { // action 1 }]]; [alertController addAction:[UIAlertAction actionWithTitle:@"Button 2" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { // action 2 }]]; [alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { [self dismissViewControllerAnimated:YES completion:nil]; }]]; [self presentViewController:alertController animated:YES completion:nil];
您可以通过⌘点击显示类/方法声明的符号来获取包括更换build议的详细信息。
在UIAlertView情况下，你会看到
“UIAlertView不推荐使用UIAlertController，而是使用UIAlertControllerStyleAlert的preferredStyle来代替”
UIAlertController自iOS 8以来一直存在。
UIAlertController * alert= [UIAlertController alertControllerWithTitle:@"My Title" message:@"Enter User Credentials" preferredStyle:UIAlertControllerStyleAlert]; [self presentViewController:alert animated:YES completion:nil];
我在iOS 8和更高版本上使用“UIAlertController”。 让我们看看：
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Success" message:@"Your InApp Purchases were successfully restored" preferredStyle:UIAlertControllerStyleAlert];
并添加button：
UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){ //do something when click button }];
记得：
[alertController addAction:okAction];
然后显示它：
[self presentViewController:alertController animated:YES completion:nill];
如果你想显示一个行动，你改变
"preferredStyle:UIAlertControllerStyleActionSheet"
UIAlertController * alert= [UIAlertController alertControllerWithTitle:@"Info" message:@"You are using UIAlertController" preferredStyle:UIAlertControllerStyleAlert]; UIAlertAction* ok = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { [alert dismissViewControllerAnimated:YES completion:nil]; }]; UIAlertAction* cancel = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) { [alert dismissViewControllerAnimated:YES completion:nil]; }]; [alert addAction:ok]; [alert addAction:cancel]; [self presentViewController:alert animated:YES completion:nil];