带输入框的UIAlertView

//点击任何处，弹出输入框
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    
    UIAlertView *dialog = [[UIAlertView alloc] initWithTitle:@"请输入分组名称" message:@"\n" delegate:self cancelButtonTitle:@"添加" otherButtonTitles:@"取消",nil];
    [dialog setAlertViewStyle:UIAlertViewStylePlainTextInput];
    [[dialog textFieldAtIndex:0] setKeyboardType:UIKeyboardTypeNumberPad];
    [dialog show];

}