更改UITextField占位符颜色

Question

如何动态更改占位符颜色UITextField？这始终是相同的系统颜色.

xib编辑器中没有选项.

Answer 1

来自Docs

@property(非原子,复制)NSAttributedString*attributedPlaceholder

默认情况下,此属性为零.如果设置,则使用70%灰色和属性字符串的剩余样式信息(文本颜色除外)绘制占位符字符串.为此属性分配新值也会使用相同的字符串数据替换占位符属性的值,尽管没有任何格式设置信息.为此属性指定新值不会影响文本字段的任何其他与样式相关的属性.

Objective-C的

NSAttributedString *str = [[NSAttributedString alloc] initWithString:@"Some Text" attributes:@{ NSForegroundColorAttributeName : [UIColor redColor] }];
self.myTextField.attributedPlaceholder = str;

迅速

let str = NSAttributedString(string: "Text", attributes: [NSForegroundColorAttributeName:UIColor.redColor()])
myTextField.attributedPlaceholder = str

斯威夫特4

let str = NSAttributedString(string: "Text", attributes: [NSAttributedString.Key.foregroundColor: UIColor.red])
myTextField.attributedPlaceholder = str

Answer 2

_placeholderLabel.textColor

在迅速

myTextField.attributedPlaceholder = 
NSAttributedString(string: "placeholder", attributes:[NSForegroundColorAttributeName : UIColor.redColor()])

Objective-C的

UIColor *color = [UIColor grayColor];
nameText.attributedPlaceholder =
   [[NSAttributedString alloc]
   initWithString:@"Full Name"
   attributes:@{NSForegroundColorAttributeName:color}];

PS复制了Stackoverflow的3个不同答案.

Answer 3

使用以下代码

[YourtextField setValue:[UIColor colorWithRed:97.0/255.0 green:1.0/255.0 blue:17.0/255.0 alpha:1.0] forKeyPath:@"_placeholderLabel.textColor"];

Answer 4

首先添加此扩展名

extension UITextField{
    @IBInspectable var placeHolderTextColor: UIColor? {
        set {
            let placeholderText = self.placeholder != nil ? self.placeholder! : ""
            attributedPlaceholder = NSAttributedString(string:placeholderText, attributes:[NSForegroundColorAttributeName: newValue!])
        }
        get{
            return self.placeHolderTextColor
        }
    }
}

然后,您可以通过故事板更改占位符文本颜色,或者只需将其设置为:

textfield.placeHolderTextColor = UIColor.red