UITextField 在 iOS 中将占位符颜色设置为深色

我尝试过设置UITextField “占位符”颜色为深色。

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

textField.attributedPlaceholder = search;

• 但仍然UITextField呈现浅灰色“占位符”.

• 可以设置暗吗“占位符”颜色为UITextField?

我也尝试过另一种方法

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

但这两种方法都适用iOS 7，但没有致力于iOS 6.

• 可以设置暗吗“占位符”颜色为UITextField in iOS 6 target?

Thanks!

正如 Apple 所建议的，子类化 UITextField 并覆盖- (void)drawPlaceholderInRect:(CGRect)rect是要走的路：

- (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]; 
    } 
 } 

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