UITextField在iOS中将占位符颜色设置为暗色 [英] UITextField set placeholder color as dark in iOS

问题描述

我试图将 UITextField 占位符颜色设置为暗。

I have tried to set UITextField "Placeholder" color as dark.

NSAttributedString * search = [[NSAttributedString alloc] initWithString:@"Search" attributes:@{NSForegroundColorAttributeName: [UIColor blackColor]}];

textField.attributedPlaceholder = search;

• 但仍然 UITextField 在占位符中显示浅灰色。

  是否可以设置深色占位符 UITextField 的颜色？

  Is it possible to set dark "placeholder" color for UITextField?

  另外我也尝试了另一种方法

  Also I Have tried the another method as well

  [textField setValue:[UIColor blackColor] forKeyPath:@"_placeholderLabel.textColor"];
  

  但这两种方法都适用于 iOS 7 ，但不能正常工作 iOS 6 。

  But both methods are working in iOS 7, But not working on iOS 6.

  
  
  • 是否可以为<设置深色占位符颜色 iOS 6 目标中的code> UITextField ？
  
  
  • Is it possible to set dark "placeholder" color for UITextField in iOS 6 target?

  谢谢！

  推荐答案

  正如Apple建议的那样，继承UITextField并覆盖 - （void）drawPlaceholderInRect：（CGRect）rect 是要走的路：

  As suggested by Apple, subclassing UITextField and overriding - (void)drawPlaceholderInRect:(CGRect)rect is the way to go:

  - (void)drawPlaceholderInRect:(CGRect)rect { 
      UIColor *colour = [UIColor lightGrayColor]; 
      if ([self.placeholder respondsToSelector:@selector(drawInRect:withAttributes:)]) 
      { // iOS7 and later 
          NSDictionary *attributes = @{NSForegroundColorAttributeName: colour, NSFontAttributeName: self.font}; 
          CGRect boundingRect = [self.placeholder boundingRectWithSize:rect.size options:0 attributes:attributes context:nil]; 
          [self.placeholder drawAtPoint:CGPointMake(0, (rect.size.height/2)-boundingRect.size.height/2) withAttributes:attributes]; } 
      else { // iOS 6 
          [colour setFill]; 
          [self.placeholder drawInRect:rect withFont:self.font lineBreakMode:NSLineBreakByTruncatingTail alignment:self.textAlignment]; 
      } 
   } 
  

  信用：http://www.brightec.co.uk/blog/how-change -colour-uitextfields-placeholder-text-ios7-and-still-support-ios6

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