//alert 标题 提示信息 警告框的形式
```
UIAlertController * alert = [UIAlertController alertControllerWithTitle:@"警告" message:@"提示信息" preferredStyle:UIAlertControllerStyleAlert];
//增加选项1
[alert addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//点击确认按钮的事件
NSLog(@"确定键被触发----");
}]];
//增加选项2
[alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
// 点击取消按钮的事件的
NSLog(@"取消按钮被触发-----");
}]];
//增加输入框
[alert addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
//可以进行文本框订制信息 后续操作
textField.backgroundColor = [UIColor redColor];
}];
//展现方式
[self presentViewController:alert animated:YES completion:nil];
//延时2秒后自动消失
[self performSelector:@selector(dismissAlert:) withObject:alert afterDelay:2];
-(void)dismissAlert:(UIAlertController *)alert{
if (alert) {
[alert dismissViewControllerAnimated:YES completion:nil];
}
}
```
/************************页面底部弹框************************
```
UIAlertController * actionSheet = [UIAlertController alertControllerWithTitle:@"分享" message:@"提示" preferredStyle:UIAlertControllerStyleActionSheet];
[actionSheet addAction:[UIAlertAction actionWithTitle:@"新浪微博" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"分享到新浪微博 ---- ");
}]];
[actionSheet addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil]];
[self presentViewController:actionSheet animated:YES completion:nil];
```
