iOS UITextView載入有HTML標籤的HTML程式碼範例

在開發中，我們載入HTML最常用的是UIWebView，其實UITextView也可以載入HTML代碼。

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(0, 40, kScreenWidth, kScreenHeight - 50)];
    [self.view addSubview:textView];
    
    //HTML代碼
   NSString *htmlStr = @"
 
<img src=\"http://img0.imgtn.bdimg.com/it/u=1368418777,3304551799&fm=21&gp=0.jpg\"
 
hiuehuirhfiefguihuiefuwifhewufcehsifhoifhiofhwohfwiohfwoicehicehiheifjkhuhuihwefhuiwhfibfiwehfurwhfuiwhfuiwefhuirwhfiw
 
<img src=\"http://img0.imgtn.bdimg.com/it/u=331456922,2614791273&fm=21&gp=0.jpg\"
 
hviurhrihvuerhviohvoiwehvewiohiowhviowvhoiheiohihuihguguygigdusichvregtgtgegtgvrtvtrbtrbtrbtrbtrbtbtvrgeggergrbrt<img src=\"http://img3.imgtn.bdimg.com/it/u=3236147722,3184690082&fm=21&gp=0.jpg\"
 
hiuehuirhfiefguihuiefuwifhewufcehsicehicehiheifjkhuhuihwefhuiwhfibfiwehfurwhfuiwhfuiwefhuirwhfiw
 
";
    
    //對圖片大小進行處理，適應螢幕寬度
    NSString *newString = [htmlStr stringByReplacingOccurrencesOfString:@"<img" withString:[NSString stringWithFormat:@"<img width=\"%f\"",kScreenWidth - 10]];
    
    NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData:[newString dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
    textView.attributedText = attributedString;
}

注意：在info.plist中配置：

<key>App Transport Security Settings</key>
<dict>
  <key>Allow Arbitrary Loads</key>
  <true/>
</dict>

註：

// 當前螢幕寬度
#define kScreenWidth    [UIScreen mainScreen].bounds.size.width
// 當前螢幕高度
#define kScreenHeight   [UIScreen mainScreen].bounds.size.height