UITextView设置文字垂直居中和LinkAttribute

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UITextView设置文字垂直居中和LinkAttribute

想要几行文字居中对齐的实现方式有多种,如使用：UILabel，UITextField，UITextView。以下是UITextView的简单使用。

    NSMutableDictionary *ornamentAttributes = [NSMutableDictionary dictionary];    NSMutableParagraphStyle *ornamentParagraph = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];    //设置text文字垂直居中    ornamentParagraph.alignment = NSTextAlignmentCenter;    //设置行间距    ornamentParagraph.lineSpacing = 5;    ornamentAttributes[NSParagraphStyleAttributeName] = ornamentParagraph;    //整个字符串的样式    NSDictionary *attributes = @{NSFontAttributeName:[UIFont systemFontOfSize:17],NSParagraphStyleAttributeName: ornamentParagraph, NSForegroundColorAttributeName: UIColorFromRGB(0x7dd4f2)};    //设置可点击字符串的Attributes    NSDictionary *linkAttributes = @{NSUnderlineStyleAttributeName: [NSNumber numberWithInteger:NSUnderlineStyleSingle], NSLinkAttributeName: @"1", NSForegroundColorAttributeName: [UIColor whiteColor]};    //初始化字符串    NSMutableAttributedString *content = [[NSMutableAttributedString alloc]initWithString:[NSString stringWithFormat:@"注册使用XXXXX,就表示您同意\nXXXXX的用户协议"] attributes: attributes];    [content addAttributes:linkAttributes range: NSMakeRange(content.length - 4, 4)];    self.textView.editable = NO;    self.textView.linkTextAttributes = linkAttributes;    self.textView.delegate = self;//设置UITextView的代理为self    self.textView.attributedText = content;    self.textView.backgroundColor = [UIColor clearColor];    [self.view addSubview:_textView];

实现UITextViewDelegate的代理方法：
- (BOOL) textView:(UITextView )textView shouldInteractWithURL:(NSURL )URL inRange:(NSRange)characterRange

- (BOOL) textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange {    ...    ...    do some thing;    ...    ...    return YES;}

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