UITextView *textView = [[UITextView alloc]initWithFrame:CGRectMake(100, 100, 200, 300)];

textView.textAlignment = NSTextAlignmentCenter;

?textView.textColor= [UIColorblackColor];

[self.viewaddSubview:textView];

NSAttributedString *attString = [[NSAttributedString alloc]initWithData:[html dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute : NSHTMLTextDocumentType} documentAttributes:nil error:nil];

textView.attributedText= attString;

幾句代碼就解決了