在丰富的UITextView（iOS 6）中未显示文本属性

Question

我试图设置iOS 6 UITextView中某些初始文本的字体颜色。在UI 6模拟器中运行时，视图出现，但不显示属性。我错过了什么吗？

NSAttributedString *as = [[NSAttributedString alloc] initWithString:boilerText 
    attributes:[NSDictionary dictionaryWithObjectsAndKeys: 
     NSForegroundColorAttributeName, [UIColor redColor] , 
     NSUnderlineStyleAttributeName, 
      [NSNumber numberWithInt: NSUnderlineStyleSingle],nil] 
     ]; 

_descriptionView.attributedText = as; 

Answer 1

该方法说dictionaryWithObjectsAndKeys。你已经把你的物体和钥匙颠倒了。试试这个：

NSAttributedString *as = [[NSAttributedString alloc] initWithString:boilerText 
    attributes:[NSDictionary dictionaryWithObjectsAndKeys: 
    [UIColor redColor], NSForegroundColorAttributeName, 
    [NSNumber numberWithInt: NSUnderlineStyleSingle], NSUnderlineStyleAttributeName, 
    nil]];