【iOS】UIView

UIView 兩三事。

• 使用 hex 設成特殊色背景，可先用 Digital Color 測量器，取色後將值填入 UIColorFromRGB  

  #define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0] [profileListPanel setBackgroundColor:UIColorFromRGB(0xDDDFE4)];

• 製作圓角 UIView

  [aView setAlpha:0.9f]; [[aView layer] setBorderWidth:4.0f]; [[aView layer] setBorderColor:[UIColor clearColor].CGColor]; [[aView layer] setMasksToBounds:YES]; [[aView layer] setBackgroundColor:[UIColor clearColor].CGColor]; [[aView layer] setCornerRadius:10.0f];

• 對齊方式共有
  - UIViewAutoresizingNone
  - UIViewAutoresizingFlexibleWidth
  - UIViewAutoresizingFlexibleHeight
  - UIViewAutoresizingFlexibleTopMargin
  - UIViewAutoresizingFlexibleBottomMargin
  - UIViewAutoresizingFlexibleLeftMargin
  - UIViewAutoresizingFlexibleRightMargin
• 有將視窗顯示出類似 UIPopoverController/UIToolBar 的需求(Framed Table)，但一些邊框顏色有些許不同時， 中間也需自己調整高度的話，可以切成三張圖，分別利用三個UIImageView 來貼出背景圖。
  - dialogbox_bg_top (類似UIPopoverController 上半部，大小為 484x78)
  - dialogbox_bg_center ( 類似UIPopoverController 中間部 484x1 ，高度為 1 讓它可自行延展)
  - dialogbox_bg_end (類似UIPopoverController 下半部 484x78)

  UIImageView *imageViewTop = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"dialogbox_bg_top.png"]]; imageViewTop.frame = CGRectMake(0.0f, 0.0f, 484.0f, 78.0f); [aView addSubview: imageViewTop]; [aView bringSubviewToFront:imageViewTop]; [imageViewTop release]; imageViewTop = nil; UIImageView *imageViewCenter = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"dialogbox_bg_center.png"]]; if (profilePurchased) { imageViewCenter.frame = CGRectMake(0.0f, 78.0f, 484.0f, WITHOUT_SOME_LAYOUT - (78.0f*2)); }else { imageViewCenter.frame = CGRectMake(0.0f, 78.0f, 484.0f, 648.0f-78.0f*2); } [aView addSubview: imageViewCenter]; [aView bringSubviewToFront:imageViewCenter]; [imageViewCenter release]; imageViewCenter = nil; UIImageView *imageViewEnd = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"dialogbox_bg_end.png"]]; if (profilePurchased) { imageViewEnd.frame = CGRectMake(0.0f, WITHOUT_SOME_LAYOUT - 78.0f, 484.0f, 78.0f); }else { imageViewEnd.frame = CGRectMake(0.0f, 648.0f - 78.0f, 484.0f, 78.0f); }    [aView addSubview: imageViewEnd]; [aView bringSubviewToFront:imageViewEnd]; [imageViewEnd release]; imageViewEnd = nil;

• 承上，這樣的話原本是在UIToolBar/UIBarButtonItem的就要自行貼入所需要的UIButton。範例如下

  UIImage *btnCancelImg = [UIImage imageNamed:@"dialog_btn_bg_black.png"]; UIButton *btnCancel = [UIButton buttonWithType:UIButtonTypeCustom]; [btnCancel setAlpha:0.9f]; [btnCancel setFrame:CGRectMake(12.0, 6.0, 50.0, 29.0)]; [btnCancel setBackgroundImage:btnCancelImg forState:UIControlStateNormal]; [btnCancel setTitle:@"Cancel" forState:UIControlStateNormal]; [btnCancel.titleLabel setFont:[UIFont fontWithName:@"Arial-BoldMT" size:12]]; [btnCancel setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; [btnCancel addTarget: self action: @selector(doCancel:) forControlEvents: UIControlEventTouchDown]; [aView addSubview:btnCancel];

• 原本的顯示文字也要自行貼入，範例如下

  UILabel *aLabel = [[UILabel alloc]initWithFrame:CGRectMake(160.0f, 10.0f, 200.0f, 20.0f)]; aLabel.text = @"Game Pad Rack"; aLabel.textColor = [UIColor whiteColor]; [aLabel setFont:[UIFont fontWithName:@"Arial-BoldMT" size:20.0f]]; aLabel.backgroundColor = [UIColor clearColor]; aLabel.font = [UIFont boldSystemFontOfSize:20.0f]; [aLabel setBackgroundColor:[UIColor clearColor]]; [aView addSubview:labGamePadRack]; [aLabel release];

• removeFromSuperview/
• viewWithTag
• 遞迴處理所有子視圖的方式

  for (UIView *subview in [aView subviews]) { }