IOS自定义UIAlertView样式，实现可替换背景和按钮

   

      UIAlertView 是一个十分常用的控件，网上也有好多类似的自定义AlertView的方法。但是感觉效果都不是很好，它们有的是在系统自带的上面添加文本框，也有的是完全自己用UIView来实现，还有的就是继承了UIAlertView 。

      今天给大家带来的这个UIAlertView ，它也是继承了UIAlertView，然后屏蔽了系统的背景图片，和 按钮，然后自己添加，事件响应，从而完成了样式的自定义，这样做的好处是保留了 UIAlertView的模态窗口。

 

最终的效果图：

 

 

 //
 //  JKCustomAlert.m
 //  AlertTest
 //
 //  Created by  on 12-5-9.
 //  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
 //

 #import <UIKit/UIKit.h>
 @protocol JKCustomAlertDelegate <NSObject>
 @optional
 - (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex;
 @end

 @interface JKCustomAlert : UIAlertView {
     id  JKdelegate;
     UIImage *backgroundImage;
     UIImage *contentImage;
     NSMutableArray *_buttonArrays;

 }

 @property(readwrite, retain) UIImage *backgroundImage;
 @property(readwrite, retain) UIImage *contentImage;
 @property(nonatomic, assign) id JKdelegate;
 - (id)initWithImage:(UIImage *)image contentImage:(UIImage *)content;
 -(void) addButtonWithUIButton:(UIButton *) btn;
 @end

 

 //
 //
 //  JKCustomAlert.m
 //  AlertTest
 //
 //  Created by  on 12-5-9.
 //  Copyright (c) 2012年 __MyCompanyName__. All rights reserved.
 //

 #import "JKCustomAlert.h"

 @interface JKCustomAlert ()
     @property(nonatomic, retain) NSMutableArray *_buttonArrays;
 @end

 @implementation JKCustomAlert

 @synthesize backgroundImage,contentImage,_buttonArrays,JKdelegate;

 - (id)initWithImage:(UIImage *)image contentImage:(UIImage *)content{
     if (self == [super init]) {

         self.backgroundImage = image;
         self.contentImage = content;
         self._buttonArrays = [NSMutableArray arrayWithCapacity:4];
         }
     return self;
 }

 -(void) addButtonWithUIButton:(UIButton *) btn
 {
     [_buttonArrays addObject:btn];
 }


 - (void)drawRect:(CGRect)rect {

     CGSize imageSize = self.backgroundImage.size;
     [self.backgroundImage drawInRect:CGRectMake(0, 0, imageSize.width, imageSize.height)];

 }

 - (void) layoutSubviews {
     //屏蔽系统的ImageView 和 UIButton
     for (UIView *v in [self subviews]) {
         if ([v class] == [UIImageView class]){
             [v setHidden:YES];
         }


         if ([v isKindOfClass:[UIButton class]] ||
             [v isKindOfClass:NSClassFromString(@"UIThreePartButton")]) {
             [v setHidden:YES];
         }
     }

     for (int i=0;i<[_buttonArrays count]; i++) {
         UIButton *btn = [_buttonArrays objectAtIndex:i];
         btn.tag = i;
         [self addSubview:btn];
         [btn addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
     }

     if (contentImage) {
         UIImageView *contentview = [[UIImageView alloc] initWithImage:self.contentImage];
         contentview.frame = CGRectMake(0, 0, backgroundImage.size.width, backgroundImage.size.height);
         [self addSubview:contentview];
     }
 }

 -(void) buttonClicked:(id)sender
 {
     UIButton *btn = (UIButton *) sender;

     if (JKdelegate) {
         if ([JKdelegate respondsToSelector:@selector(alertView:clickedButtonAtIndex:)])
         {
             [JKdelegate alertView:self clickedButtonAtIndex:btn.tag];
         }
     }

     [self dismissWithClickedButtonIndex:0 animated:YES];

 }

 - (void) show {
         [super show];
         CGSize imageSize = self.backgroundImage.size;
         self.bounds = CGRectMake(0, 0, imageSize.width, imageSize.height);


 }


 - (void)dealloc {
     [_buttonArrays removeAllObjects];
     [backgroundImage release];
     if (contentImage) {
         [contentImage release];
         contentImage = nil;
     }

     [super dealloc];
 }


 @end

原文地址：http://blog.csdn.net/toss156/article/details/7552075】

Demo下载地址：http://download.csdn.net/detail/toss156/4289966