<转>【IOS】自定义UIAlertView样式，实现可替换背景和按钮

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

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