iPad actionsjeet

• 在iphone和ipad上使用UIActionShee控件t的效果会不同，在苹果的官方文档中有相关说明：

在ipad上使用UIActionSheet控件改控件再也不从底部弹出，而是从屏幕中间弹出与UIAlertView警告框弹出有点相似。效果如图所示，cancelButton按钮文字显示不出来，destructiveButtonTitle按钮文字为红色加粗字体。

• iOS 8.3之后再也不使用actionsheet，而是统一用UIAlertController，因此若是有iOS7的用户，须要适配：

        //初始化actionsheet，适配 iOS 8.3 如下

        if([[UIDevice currentDevice].systemVersion floatValue] > 8.3){//iOS 8.3以上，废弃旧版actionsheet
            UIAlertController* actionSheet = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
            UIAlertAction *sendAction = [UIAlertAction actionWithTitle:@"发送Log文件给微信好友" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { [self SendLogToWechatFriends]; }]; [actionSheet addAction:sendAction]; actionSheet.popoverPresentationController.sourceView = _logoImgView; actionSheet.popoverPresentationController.sourceRect = _logoImgView.bounds; [actionSheet.popoverPresentationController setPermittedArrowDirections:UIPopoverArrowDirectionUp]; [self presentViewController:actionSheet animated:YES completion:nil]; }else{//iOS 8.3如下使用旧版actionsheet UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:@"发送Log文件给微信好友",nil]; actionSheet.actionSheetStyle = UIBarStyleDefault; actionSheet.delegate = self; [actionSheet showFromRect:[_logoImgView frame] inView:self.view animated:YES]; }

• 为了不适配，使用自定义的popovercontrolller，而后嵌入一个包着button的viewcontroller：

        UIViewController* actionSheet = [[UIViewController alloc]init];
        actionSheet.view.backgroundColor = [UIColor clearColor]; // UILabel* label = [[UILabel alloc]initWithFrame:CGRectMake((self.view.bounds.size.width-50)/4, 0, self.view.bounds.size.width-50, 50)]; // label.text = @"发送Log文件给微信好友"; // label.textColor = MttColorNamed(@"browser_startpage_news_category_color"); // [actionSheet.view addSubview:label];  UIButton* btn = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width-50, 50)]; btn.backgroundColor =[UIColor clearColor]; [btn setTitle:@"发送Log文件给微信好友" forState:UIControlStateNormal]; btn.titleLabel.textAlignment = NSTextAlignmentCenter; [btn setTitleColor:MttColorNamed(@"browser_startpage_news_category_color") forState:UIControlStateNormal]; [btn addTarget:self action:@selector(SendLogToWechatFriends) forControlEvents:UIControlEventTouchUpInside]; [actionSheet.view addSubview:btn]; MttPopoverController *popController = [[MttPopoverController alloc] initWithContentViewController:actionSheet]; popController.popoverContentSize = CGSizeMake(self.view.bounds.size.width-50, 50); //popController.delegate = self;  [popController presentPopoverFromRect:_logoImgView.frame inView:self.view permittedArrowDirections:WYPopoverArrowDirectionUp animated:YES]; self.popoverController = popController;

• button在设置title颜色的时候，注意状态，“|”的意思是and，不是或

更多关于actionsheet，参考http://www.jianshu.com/p/4d1ca0d9a6f1