------??? 帶有輸入框的提示框? ------

有時(shí)候 , 我們需要帶有輸入框的提示框, 如圖:

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"請(qǐng)輸入個(gè)人信息" preferredStyle:UIAlertControllerStyleAlert];

[alertController addAction:[UIAlertAction actionWithTitle:@"確定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

UITextField *userNameTextField = alertController.textFields.firstObject;

UITextField *passwordTextField = alertController.textFields.lastObject;

NSLog(@"用戶名 = %@，密碼 = %@",userNameTextField.text,passwordTextField.text);

}]];

[alertController addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:nil]];

[alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {

textField.placeholder = @"請(qǐng)輸入用戶名";

}];

[alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {

textField.placeholder = @"請(qǐng)輸入密碼";

}];

[self presentViewController:alertController animated:true completion:nil];

------? 修改系統(tǒng)提示框的字號(hào)和顏色等屬性 ------

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"" message:@"提示信息" preferredStyle:UIAlertControllerStyleAlert];

//修改標(biāo)題的內(nèi)容，字號(hào)，顏色。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"];

//修改按鈕的顏色，同上可以使用同樣的方法修改內(nèi)容，樣式

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];

------? 改變提示文字的顏色? ------

這個(gè)是系統(tǒng)自帶的,? 只是改變了提示框的展示樣式.

UIAlertActionStyleDestructive

//顯示彈出框列表選擇

UIAlertController* alert = [UIAlertController alertControllerWithTitle:@"Title"

message:@"This is an Sheet."

preferredStyle:UIAlertControllerStyleActionSheet];

UIAlertAction* cancelAction = [UIAlertAction actionWithTitle:@"取消"

style:UIAlertActionStyleCancel

handler:^(UIAlertAction * action) {

//響應(yīng)事件

NSLog(@"action = %@", action);

}];

UIAlertAction* deleteAction = [UIAlertAction actionWithTitle:@"刪除"

style:UIAlertActionStyleDestructive

handler:^(UIAlertAction * action) {

//響應(yīng)事件

NSLog(@"action = %@", action);

}];

UIAlertAction* saveAction = [UIAlertAction actionWithTitle:@"保存"

style:UIAlertActionStyleDefault

handler:^(UIAlertAction * action) {

//響應(yīng)事件

NSLog(@"action = %@", action);

}];

[alert addAction:saveAction];

[alert addAction:cancelAction];

[alert addAction:deleteAction];

[self presentViewController:alert animated:YES completion:nil];