UIAlertViewController详解

Xcode7更新后,苹果不建议使用以前的AlertView和ActionSheet了,而是将二者合一,创建了一个新的视图控制器UIAlertViewController,UIAlertViewController继承自UIViewController,通过改变设置不同的UIAlertControllerStyle来确定显示的是AlertView或者是ActionSheet.通过添加AlertAction来增加按钮,话不多说,贴上自己写的一个小Demo.

- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    [self CreateUI];}- (void)CreateUI{    UIButton * button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];    [button1 setFrame:CGRectMake(100, 100, 100, 50)];    [button1 setTitle:@"ActionSheet" forState:UIControlStateNormal];    button1.backgroundColor = [UIColor blackColor];    [button1 addTarget:self action:@selector(ShowActionSheet) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:button1];        UIButton * button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];    [button2 setFrame:CGRectMake(100, 180, 100, 50)];    [button2 setTitle:@"AlertView" forState:UIControlStateNormal];    button2.backgroundColor = [UIColor blackColor];    [button2 addTarget:self action:@selector(ShowAlertView) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:button2];    }- (void)prepareAlertCWithStyle:(UIAlertControllerStyle)alertstyle{    UIAlertController *_alertC = [UIAlertController alertControllerWithTitle:@"这是AlertController的测试" message:@"iOS8以后用UIAlertController" preferredStyle:alertstyle];    // 添加取消按钮UIAlertActionStyleCancel    UIAlertAction *canleaction = [UIAlertAction actionWithTitle:@"取消按钮" style:UIAlertActionStyleCancel handler:^(UIAlertAction * action) {        NSLog(@"点击了取消按钮");    }];        [_alertC addAction:canleaction];        // 添加普通按钮UIAlertActionStyleDefault    UIAlertAction *defaultaction = [UIAlertAction actionWithTitle:@"普通按钮" style:UIAlertActionStyleDefault handler:^(UIAlertAction * action) {        NSLog(@"点击了普通按钮");    }];    [_alertC addAction:defaultaction];    // 添加文本框,只能在alertview模式下添加textfiled    if (alertstyle == UIAlertControllerStyleAlert) {                        [_alertC addTextFieldWithConfigurationHandler:^(UITextField *textField) {            // 这里可以对文本框进行一些自定义操作            textField.placeholder = @"请输入.....";                    }];    }    // 添加UIAlertActionStyleDestructive样式按钮    UIAlertAction *replaceaction = [UIAlertAction actionWithTitle:@"销毁按钮" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * action) {        if (alertstyle == UIAlertControllerStyleAlert) {            NSLog(@"%@",_alertC.textFields[0].text);        }        NSLog(@"点击了销毁样式按钮");            }];        [_alertC addAction:replaceaction];    // 显示alertview,UIAlertController是继承与UIViewController的    [self presentViewController:_alertC animated:YES completion:nil];}- (void)ShowActionSheet{    // 设置为ActionSheet样式    [self prepareAlertCWithStyle:UIAlertControllerStyleActionSheet];}- (void)ShowAlertView{    // 设置为AlertView样式    [self prepareAlertCWithStyle:UIAlertControllerStyleAlert];}