如何自定义UIActionSheet（UIAlertView）中的内容

UIActionSheet和UIAlertView因为UI有特殊的用途，所以本身并不允许你AddSubview之类的函数来自定义界面。
解决的办法是继承它，实现一个自定义类，重载layoutSubviews函数。
#import<UIKit/UIKit.h>@interface UIImageActionSheet : UIActionSheet {
    UIImage *titleImage;
}
-(id) initWithImage:(UIImage*)image
              title:(NSString *)title
           delegate:(id<UIActionSheetDelegate>)delegatecancelButtonTitle:(NSString*)cancelButtonTitle
destructiveButtonTitle:(NSString *)destructiveButtonTitle
  otherButtonTitles:(NSString *)otherButtonTitles;
@end
#import"UIImageActionSheet.h"@implementation UIImageActionSheet
-(id) initWithImage:(UIImage*)image
              title:(NSString *)title
           delegate:(id<UIActionSheetDelegate>)delegatecancelButtonTitle:(NSString*)cancelButtonTitle
destructiveButtonTitle:(NSString *)destructiveButtonTitle
  otherButtonTitles:(NSString *)otherButtonTitles{
   
    self =[super initWithTitle:titledelegate:delegatecancelButtonTitle:cancelButtonTitle
         destructiveButtonTitle:destructiveButtonTitle
              otherButtonTitles:otherButtonTitles,nil];
   
    if(self) {
        titleImage=image;
        [titleImage retain];
        UIImageView *imageView=[[UIImageView alloc] initWithImage:titleImage];
        imageView.frame =CGRectZero;        
        //for(UIView*subViewinself.subviews){
            if(![subView isKindOfClass:[UILabel class]]) {
                [self insertSubview:imageView aboveSubview:subView];
                break;
            }
        }
       
        [imageView release];
    }
    returnself;
}


-(CGFloat) maxLabelYCoordinate {
    //Determine maximum y-coordinate of labelsCGFloat maxY =0;
    for( UIView*viewinself.subviews ){
        if([view isKindOfClass:[UILabelclass]]) {
            CGRect viewFrame =[view frame];
            CGFloat lowerY =viewFrame.origin.y+viewFrame.size.height;
            if(lowerY>maxY)
                maxY =lowerY;
        }
    }
    returnmaxY;
}

-(void) layoutSubviews{
    [super layoutSubviews];
    CGRect frame =[self frame];
    CGFloat labelMaxY =[self maxLabelYCoordinate];

    for(UIView*viewinself.subviews){
        if(![view isKindOfClass:[UILabel class]]) {   
            if([view isKindOfClass:[UIImageViewclass]]){
                CGRect viewFrame =CGRectMake((320-titleImage.size.width)/2, labelMaxY +10,
                                              titleImage.size.width, titleImage.size.height);
                [view setFrame:viewFrame];
            }
            elseif(![view isKindOfClass:[UIImageView class]]) {
                CGRect viewFrame =[view frame];
                viewFrame.origin.y +=titleImage.size.height+10;
                [view setFrame:viewFrame];
            }
        }
    }
   
    frame.origin.y -=titleImage.size.height+2.0;
    frame.size.height +=titleImage.size.height+2.0;
    [self setFrame:frame];

}
/*// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code.
}
*/-(void)dealloc {
    [super dealloc];
    if(titleImage) {
        [titleImage release];
    }
}

@end

使用：
 UIImage *tips3Img =[UIImage imageNamed:@"tips-3.png"];
UIImageActionSheet*tipsActionSheet=[[UIImageActionSheet alloc]
                                       initWithImage:tips3Img
                                       title:@"添加的图案可用以下方式调整"delegate:self cancelButtonTitle:@"知道了"destructiveButtonTitle:nil
                                       otherButtonTitles:nil];
tipsActionSheet.tag =kActionSheetTagTips;
[tipsActionSheet showInView:self.view];
[tipsActionSheet release];

图片:自定义UIActionSheet（UIAlertView）中的内容.png