uitextfield设置占位符颜色

NSMutableDictionary *attributes = [NSMutableDictionarydictionary];

    // 设置富文本对象的颜色

    attributes[NSForegroundColorAttributeName] =RGBColor(0x99,0x99, 0x99);

    // 设置UITextField的占位文字

    self.phoneNumLabeTf.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"手机号"attributes:attributes];