UI - UIAlertViewAndUIAlerController
UIAlertView 官方文档介绍:UIAlertView is deprecated in iOS 8. (Note that UIAlertViewDelegate is also deprecated.) To create and manage alerts in iOS 8 and later, instead use UIAlertController with a preferredStyleof UIAlertControllerStyleAlert.
虽然UIAlerView 被弃用,但是目前还可以使用
- (void)configureAlertViewOnTheView
{
// iOS 8 later is deprecated
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"标题1" message:@"内容1" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
[alertView addButtonWithTitle:@"都不选"];
/**
* 风格类型
UIAlertViewStyleDefault = 0,
UIAlertViewStyleSecureTextInput, //有一个不加密的textfield
UIAlertViewStylePlainTextInput, //有一个textfield加密框
UIAlertViewStyleLoginAndPasswordInput //有两个textfield，placeHolder 是 Login和password
*/
alertView.alertViewStyle = UIAlertViewStyleLoginAndPasswordInput;
[alertView show];
//判断是否显示,只读
if (alertView.visible) {
NSLog(@"当前提示正在显示");
}
//通过代码完成点击buttonIndex的button 并dismiss 当前alertView的操作
// [alertView dismissWithClickedButtonIndex:0 animated:YES];
alertView.delegate = self;
}
//点击按钮时出发的方法
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSString *title = alertView.title;
NSString *message = alertView.message;
NSString *bttonTitle = [alertView buttonTitleAtIndex:buttonIndex];
NSInteger num = [alertView numberOfButtons];
NSInteger cancelIndex = [alertView cancelButtonIndex];
UITextField *textF = [alertView textFieldAtIndex:0];
NSLog(@"title=%@,message=%@,butonTitle=%@,按钮数%ld,取消按钮位置%ld,获取 alertView 上的 textfield=%@",title,message,bttonTitle,num,cancelIndex,textF);
}
//设置alertView 的第一个otherButton的enable属性;The alert view that is being configured.
-(BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView
{
return NO;
}
-(void)willPresentAlertView:(UIAlertView *)alertView
{
NSLog(@"即将出现");
}
-(void)didPresentAlertView:(UIAlertView *)alertView
{
NSLog(@"已经出现");
}
-(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(@"即将消失");
}
-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(@"已经消失");
}
-(void)alertViewCancel:(UIAlertView *)alertView
{
NSLog(@"点击了取消按钮");
}
UIAlerController介绍
UIAlertController 同时替代了 UIAlertView 和 UIActionSheet，从系统层级上统一了 alert 的概念。UIAlertController 不管是要用 alert 还是 action sheet 方式展示，都要以 title 和 message 参数来初始化。Alert 会在当前显示的 view controller 中心以模态形式出现，action sheet 则会在底部滑出。Alert 可以同时有按钮和输入框，action sheet 仅支持按钮。
新的方式并没有把所有的 alert 按钮配置都放在初始化函数中，而是引入了一个新类 UIAlertAction 的对象(及addTextFieldWithConfigurationHandler: 方法)，在初始化之后可以进行配置。这种形式的 API 重构让对按钮数量、类型、顺序方便有了更大的控制。同时也弃用了 UIAlertView 和 UIActionSheet 使用的delegate 这种方式，而是采用更简便的完成时回调。
- (void)configureUIAlertControllerOnTheView
{
/**
* 风格类型,
UIAlertControllerStyleActionSheet = 0, //
UIAlertControllerStyleAlert
*/
UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"标题2" message:@"内容2" preferredStyle:UIAlertControllerStyleAlert];
/**
* 风格类型,
UIAlertActionStyleDefault = 0,
UIAlertActionStyleCancel,
UIAlertActionStyleDestructive
*/
UIAlertAction *action_1 = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"确定");
NSString *title = alertVC.title;
NSString *message = alertVC.message;
UIAlertAction *act = alertVC.preferredAction;
//
UIAlertControllerStyle style = alertVC.preferredStyle;
//action 数组
NSArray *arr_action = alertVC.actions;
//textfield 数组
NSArray *arr_tf = alertVC.textFields;
NSLog(@"title=%@,message=%@,首选的 action=%@,当前的风格=%ld,action数组=%@,textfield 数组=%@",title,message,act,style,arr_action,arr_tf);
}];
UIAlertAction *action_2 = [UIAlertAction actionWithTitle:@"不确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"不确定");
}];
UIAlertAction *action_3 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"取消");
}];
[alertVC addAction:action_1];
[alertVC addAction:action_2];
[alertVC addAction:action_3];
//当 alerVC 为 UIAlertControllerStyleAlert时,才可以添加textfield
[alertVC addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.backgroundColor = [UIColor lightGrayColor];
textField.placeholder = @"请输入第一个";
textField.secureTextEntry = NO;
}];
[alertVC addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.backgroundColor = [UIColor whiteColor];
textField.placeholder = @"请输入第二个";
textField.secureTextEntry = YES;
}];
[self presentViewController:alertVC animated:YES completion:nil];
}
UIAlertView 官方文档介绍:UIAlertView is deprecated in iOS 8. (Note that UIAlertViewDelegate is also deprecated.) To create and manage alerts in iOS 8 and later, instead use UIAlertController with a preferredStyleof UIAlertControllerStyleAlert.
虽然UIAlerView 被弃用,但是目前还可以使用
- (void)configureAlertViewOnTheView
{
// iOS 8 later is deprecated
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"标题1" message:@"内容1" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
[alertView addButtonWithTitle:@"都不选"];
/**
* 风格类型
UIAlertViewStyleDefault = 0,
UIAlertViewStyleSecureTextInput, //有一个不加密的textfield
UIAlertViewStylePlainTextInput, //有一个textfield加密框
UIAlertViewStyleLoginAndPasswordInput //有两个textfield，placeHolder 是 Login和password
*/
alertView.alertViewStyle = UIAlertViewStyleLoginAndPasswordInput;
[alertView show];
//判断是否显示,只读
if (alertView.visible) {
NSLog(@"当前提示正在显示");
}
//通过代码完成点击buttonIndex的button 并dismiss 当前alertView的操作
// [alertView dismissWithClickedButtonIndex:0 animated:YES];
alertView.delegate = self;
}
//点击按钮时出发的方法
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSString *title = alertView.title;
NSString *message = alertView.message;
NSString *bttonTitle = [alertView buttonTitleAtIndex:buttonIndex];
NSInteger num = [alertView numberOfButtons];
NSInteger cancelIndex = [alertView cancelButtonIndex];
UITextField *textF = [alertView textFieldAtIndex:0];
NSLog(@"title=%@,message=%@,butonTitle=%@,按钮数%ld,取消按钮位置%ld,获取 alertView 上的 textfield=%@",title,message,bttonTitle,num,cancelIndex,textF);
}
//设置alertView 的第一个otherButton的enable属性;The alert view that is being configured.
-(BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView
{
return NO;
}
-(void)willPresentAlertView:(UIAlertView *)alertView
{
NSLog(@"即将出现");
}
-(void)didPresentAlertView:(UIAlertView *)alertView
{
NSLog(@"已经出现");
}
-(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(@"即将消失");
}
-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex
{
NSLog(@"已经消失");
}
-(void)alertViewCancel:(UIAlertView *)alertView
{
NSLog(@"点击了取消按钮");
}
UIAlerController介绍
UIAlertController 同时替代了 UIAlertView 和 UIActionSheet，从系统层级上统一了 alert 的概念。UIAlertController 不管是要用 alert 还是 action sheet 方式展示，都要以 title 和 message 参数来初始化。Alert 会在当前显示的 view controller 中心以模态形式出现，action sheet 则会在底部滑出。Alert 可以同时有按钮和输入框，action sheet 仅支持按钮。
新的方式并没有把所有的 alert 按钮配置都放在初始化函数中，而是引入了一个新类 UIAlertAction 的对象(及addTextFieldWithConfigurationHandler: 方法)，在初始化之后可以进行配置。这种形式的 API 重构让对按钮数量、类型、顺序方便有了更大的控制。同时也弃用了 UIAlertView 和 UIActionSheet 使用的delegate 这种方式，而是采用更简便的完成时回调。
- (void)configureUIAlertControllerOnTheView
{
/**
* 风格类型,
UIAlertControllerStyleActionSheet = 0, //
UIAlertControllerStyleAlert
*/
UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"标题2" message:@"内容2" preferredStyle:UIAlertControllerStyleAlert];
/**
* 风格类型,
UIAlertActionStyleDefault = 0,
UIAlertActionStyleCancel,
UIAlertActionStyleDestructive
*/
UIAlertAction *action_1 = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"确定");
NSString *title = alertVC.title;
NSString *message = alertVC.message;
UIAlertAction *act = alertVC.preferredAction;
//
UIAlertControllerStyle style = alertVC.preferredStyle;
//action 数组
NSArray *arr_action = alertVC.actions;
//textfield 数组
NSArray *arr_tf = alertVC.textFields;
NSLog(@"title=%@,message=%@,首选的 action=%@,当前的风格=%ld,action数组=%@,textfield 数组=%@",title,message,act,style,arr_action,arr_tf);
}];
UIAlertAction *action_2 = [UIAlertAction actionWithTitle:@"不确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"不确定");
}];
UIAlertAction *action_3 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"取消");
}];
[alertVC addAction:action_1];
[alertVC addAction:action_2];
[alertVC addAction:action_3];
//当 alerVC 为 UIAlertControllerStyleAlert时,才可以添加textfield
[alertVC addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.backgroundColor = [UIColor lightGrayColor];
textField.placeholder = @"请输入第一个";
textField.secureTextEntry = NO;
}];
[alertVC addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
textField.backgroundColor = [UIColor whiteColor];
textField.placeholder = @"请输入第二个";
textField.secureTextEntry = YES;
}];
[self presentViewController:alertVC animated:YES completion:nil];
}