使用UITextField的共有属性attributedPlaceholder
self.textField.attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.placeHolder attributes:@{NSForegroundColorAttributeName: YHGrayColor_51}];
- (void)drawRect:(CGRect)rect
{
UIColor *color = [UIColor redColor];
self.textField.attributedPlaceholder = [[NSAttributedString alloc] initWithString:self.placeHolder attributes:@{NSForegroundColorAttributeName: color}];
}
