------ 带有输入框的提示框 ------
有时候 , 我们需要带有输入框的提示框, 如图:
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"请输入个人信息" preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
UITextField *userNameTextField = alertController.textFields.firstObject;
UITextField *passwordTextField = alertController.textFields.lastObject;
NSLog(@"用户名 = %@，密码 = %@",userNameTextField.text,passwordTextField.text);
}]];
[alertController addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:nil]];
[alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.placeholder = @"请输入用户名";
}];
[alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.placeholder = @"请输入密码";
}];
[self presentViewController:alertController animated:true completion:nil];
------ 修改系统提示框的字号和颜色等属性 ------
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"" message:@"提示信息" preferredStyle:UIAlertControllerStyleAlert];
//修改标题的内容，字号，颜色。使用的key值是“attributedTitle”
NSMutableAttributedString *hogan = [[NSMutableAttributedString alloc] initWithString:@"提示"];
[hogan addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:40] range:NSMakeRange(0, [[hogan string] length])];
[hogan addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, [[hogan string] length])];
[alertController setValue:hogan forKey:@"attributedTitle"];
//修改按钮的颜色，同上可以使用同样的方法修改内容，样式
UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"Default" style:UIAlertActionStyleDefault handler:nil];
[defaultAction setValue:[UIColor grayColor] forKey:@"_titleTextColor"];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:nil];
[cancelAction setValue:[UIColor greenColor] forKey:@"_titleTextColor"];
[alertController addAction:defaultAction];
[alertController addAction:cancelAction];
[self presentViewController:alertController animated:YES completion:nil];
------ 改变提示文字的颜色 ------
这个是系统自带的, 只是改变了提示框的展示样式.
UIAlertActionStyleDestructive
//显示弹出框列表选择
UIAlertController* alert = [UIAlertController alertControllerWithTitle:@"Title"
message:@"This is an Sheet."
preferredStyle:UIAlertControllerStyleActionSheet];
UIAlertAction* cancelAction = [UIAlertAction actionWithTitle:@"取消"
style:UIAlertActionStyleCancel
handler:^(UIAlertAction * action) {
//响应事件
NSLog(@"action = %@", action);
}];
UIAlertAction* deleteAction = [UIAlertAction actionWithTitle:@"删除"
style:UIAlertActionStyleDestructive
handler:^(UIAlertAction * action) {
//响应事件
NSLog(@"action = %@", action);
}];
UIAlertAction* saveAction = [UIAlertAction actionWithTitle:@"保存"
style:UIAlertActionStyleDefault
handler:^(UIAlertAction * action) {
//响应事件
NSLog(@"action = %@", action);
}];
[alert addAction:saveAction];
[alert addAction:cancelAction];
[alert addAction:deleteAction];
[self presentViewController:alert animated:YES completion:nil];
