/** 关于UIAlertController的解析 */#import <UIKit/UIViewController.h>//NS_ASSUME_NONNULL_BEGIN//枚举 UIAlertActionStyletypedef NS_ENUM(NSInteger, UIAlertActionStyle) {    UIAlertActionStyleDefault = 0,//默认    UIAlertActionStyleCancel,//取消    UIAlertActionStyleDestructive//颜色突出的} NS_ENUM_AVAILABLE_IOS(8_0);//枚举 UIAlertControllerStyletypedef NS_ENUM(NSInteger, UIAlertControllerStyle) {    UIAlertControllerStyleActionSheet = 0,//actionSheet// 从底部弹出    UIAlertControllerStyleAlert//alertView 从中间弹出} NS_ENUM_AVAILABLE_IOS(8_0);/* ********************************UIAlertAction********************************///aletviewCon的内部模块按钮NS_CLASS_AVAILABLE_IOS(8_0) @interface UIAlertAction : NSObject <NSCopying>/** *  类方法创建 * *  @param title   标题内容 *  @param style   action的样式 *  @param handler 点击后执行的操作block模式 * *  @return  */+ (instancetype)actionWithTitle:(nullable NSString *)title style:(UIAlertActionStyle)style handler:(void (^ __nullable)(UIAlertAction *action))handler;@property (nullable, nonatomic, readonly) NSString *title;@property (nonatomic, readonly) UIAlertActionStyle style;//是否可点击@property (nonatomic, getter=isEnabled) BOOL enabled;@end/* ********************************UIAlertController********************************/NS_CLASS_AVAILABLE_IOS(8_0) @interface UIAlertController : UIViewController/** *  工厂方法创建 * *  @param title          标题 *  @param message        详细标题 *  @param preferredStyle 样式 * *  @return */+ (instancetype)alertControllerWithTitle:(nullable NSString *)title message:(nullable NSString *)message preferredStyle:(UIAlertControllerStyle)preferredStyle;/** *  添加按钮 * *  @param action */- (void)addAction:(UIAlertAction *)action;//按钮数组（）只读的@property (nonatomic, readonly) NSArray<UIAlertAction *> *actions;//偏好action，将以后的action设置为偏好action，action的字体会加粗@property (nonatomic, strong, nullable) UIAlertAction *preferredAction NS_AVAILABLE_IOS(9_0);//alerviewstyle添加文本框的方法 可在block设置textfield的属性- (void)addTextFieldWithConfigurationHandler:(void (^ __nullable)(UITextField *textField))configurationHandler;@property (nullable, nonatomic, readonly) NSArray<UITextField *> *textFields;//装有往弹窗添加的文本框的数组(只读)@property (nullable, nonatomic, copy) NSString *title;@property (nullable, nonatomic, copy) NSString *message;@property (nonatomic, readonly) UIAlertControllerStyle preferredStyle;//样式(只读)@endNS_ASSUME_NONNULL_END

- (IBAction)button:(id)sender {//    UIAlertController *alertCon = [UIAlertController alertControllerWithTitle:@"提示" message:@"wocao" preferredStyle:UIAlertControllerStyleActionSheet];    UIAlertController *alertCon = [UIAlertController alertControllerWithTitle:@"提示" message:@"wocao" preferredStyle:UIAlertControllerStyleAlert];    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"默认" style:UIAlertActionStyleDefault handler:nil];    UIAlertAction *action3 = [UIAlertAction actionWithTitle:@"不知道" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {        NSLog(@"wocaodelai ");    }];//    action3.enabled = NO;    [alertCon addAction:action1];    [alertCon addAction:action2];    [alertCon addAction:action3];    alertCon.preferredAction = action3;    [alertCon addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {        textField.textColor = [UIColor redColor];    }];    [alertCon addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {        textField.textColor = [UIColor yellowColor];        textField.textAlignment = NSTextAlignmentRight;    }];//    NSLog(@"textFields %@", alertCon.textFields);    [self presentViewController:alertCon animated:YES completion:nil];}