UIAlertView

API:

#import <Foundation/Foundation.h>

#import <UIKit/UIKitDefines.h>

#import <UIKit/UITextField.h>

#import <UIKit/UIView.h>

typedef NS_ENUM(NSInteger, UIAlertViewStyle) {

UIAlertViewStyleDefault = 0,

UIAlertViewStyleSecureTextInput,

UIAlertViewStylePlainTextInput,

UIAlertViewStyleLoginAndPasswordInput

};

@protocol UIAlertViewDelegate; 遵守的协议

@class UILabel, UIToolbar, UITabBar, UIWindow, UIBarButtonItem, UIPopoverController;

NS_CLASS_AVAILABLE_IOS(2_0) @interface UIAlertView
: UIView

- (instancetype)initWithTitle:(NSString *)title message:(NSString *)message
delegate:(id/*<UIAlertViewDelegate>*/)delegate cancelButtonTitle:(NSString *)cancelButtonTitle
otherButtonTitles:(NSString *)otherButtonTitles, ... NS_REQUIRES_NIL_TERMINATIONNS_EXTENSION_UNAVAILABLE_IOS("Use
UIAlertController instead.");

@property(nonatomic,assign) id /*<UIAlertViewDelegate>*/ delegate;
// weak reference

一般用于初始化的时候直接赋值

@property(nonatomic,copy) NSString *title;

@property(nonatomic,copy) NSString *message;

当一个view中有多个alertView时，用tag值区分

alert.tag=0

添加按钮并直接给标题

- (NSInteger)addButtonWithTitle:(NSString *)title;

指定索引的按钮标题

- (NSString *)buttonTitleAtIndex:(NSInteger)buttonIndex;

按钮总数

@property(nonatomic,readonly) NSInteger numberOfButtons;

取消按钮的索引值

@property(nonatomic) NSInteger cancelButtonIndex;

获取其他按钮的索引值

@property(nonatomic,readonly) NSInteger firstOtherButtonIndex;

@property(nonatomic,readonly,getter=isVisible) BOOL visible;

显示弹出的方法，不掉用，则不显示整个alertview控件

- (void)show;

- (void)dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated;

alert显示的样式，默认的样式为UIAlertViewStyleDefault(一共有4个样式，在上面typedef NS_ENUM)

@property(nonatomic,assign) UIAlertViewStyle alertViewStyle NS_AVAILABLE_IOS(5_0);

/* Retrieve a text field at an index - raises NSRangeException when textFieldIndex is out-of-bounds.

The field at index 0 will be the first text field (the single field or the login field), the field at index 1 will be the password field.　　

/ *检索文本字段索引,提高NSRangeException textFieldIndex时是禁止入内的。

　　在索引0将成为第一个文本字段(单一字段或登录字段),在指数1将密码字段。* / */

- (UITextField *)textFieldAtIndex:(NSInteger)textFieldIndex NS_AVAILABLE_IOS(5_0);

@end

@protocol UIAlertViewDelegate <NSObject>

@optional

选中的那个button处理点击事件，传递的参数是button的索引值

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex;

- (void)alertViewCancel:(UIAlertView *)alertView; 取消按钮的事件

- (void)willPresentAlertView:(UIAlertView *)alertView; 即将显示时的事件

- (void)didPresentAlertView:(UIAlertView *)alertView; 已经显示时的事件

- (void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex;
即将消失时执行的事件

- (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:

(NSInteger)buttonIndex; 已经消失时执行的事件

- (BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView *)alertView;

@end

基于UITableView

//当选中某行，所触发的方法

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath{

// 屏幕上弹出的提示框（可以不遵守UIAlertViewDelegate协议也能使用）

UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"这是个UIAlertView"message:@"啦啦" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:@"取消",nil];

alert.tag=100;

[alert show];

}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

if (buttonIndex==0) {

NSLog(@"点击的是第一个按钮");//可以任意写想要的事件

}

else if (buttonIndex==1){

NSLog(@"点击的是第二个按钮");

}

else if (buttonIndex==2){

NSLog(@"点击的是第三个按钮");

}

}