更改UITextField占位符顏色

Question

如何動態更改UITextField占位符顏色？ 這始終是相同的系統顏色。

xib編輯器中沒有選項。

Answer 1

來自Docs

@property（非原子，復制）NSAttributedString * attributedPlaceholder

默認情況下，此屬性為零。 如果設置，則使用70％灰色和屬性字符串的剩余樣式信息（文本顏色除外）繪制占位符字符串。 為此屬性分配新值也會使用相同的字符串數據替換占位符屬性的值，盡管沒有任何格式設置信息。 為此屬性指定新值不會影響文本字段的任何其他與樣式相關的屬性。

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復制了Stackoverflow的3個不同答案。

Answer 3

使用以下代碼

[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

首先添加此擴展名

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，您可以通過故事板更改占位符文本顏色，或者只需將其設置為：

textfield.placeHolderTextColor = UIColor.red

Answer 5

我在SWIFT中使用它：

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

似乎這適用於其他人...我不知道為什么它之前沒有為我工作...也許一些項目設置。 感謝您的評論。 目前我無法再怎樣測試它。

已過時： 但我不知道為什么，文本應用正確，但占位符顏色保持不變（黑色/灰色）。

--iOS8

Answer 6

試試這個：

NSAttributedString *strUser = [[NSAttributedString alloc] initWithString:@"Username" attributes:@{ NSForegroundColorAttributeName : [UIColor whiteColor] }];
NSAttributedString *strPassword = [[NSAttributedString alloc] initWithString:@"Password" attributes:@{ NSForegroundColorAttributeName : [UIColor whiteColor] }];

self.username.attributedPlaceholder = strUser;
self.password.attributedPlaceholder = strPassword;

Answer 7

您可以使用以下代碼

[txtUsername setValue:[UIColor darkGrayColor] forKeyPath:@"_placeholderLabel.textColor"];

Answer 8

此解決方案在沒有任何子類化且沒有任何私有ivars的情況下工作：

@IBOutlet weak var emailTextField: UITextField! {
    didSet {
        if emailTextField != nil {
            let placeholderText = NSLocalizedString("Tap here to enter", comment: "Tap here to enter")
            let placeholderString = NSAttributedString(string: placeholderText, attributes: [NSForegroundColorAttributeName: UIColor(white: 0.66, alpha: 1.0)])
            emailTextField.attributedPlaceholder = placeholderString
        }
    }
}

Answer 9

試試這個。

UIColor *color = [UIColor redColor];
self.txtUsername.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"Your Placeholder Text" attributes:@{NSForegroundColorAttributeName:color}];

Answer 10

@ DogCoffee在Swift中的回答是

let placeholderAttrs = [ NSForegroundColorAttributeName : UIColor.redColor()]
let placeholder = NSAttributedString(string: "Some text", attributes: placeholderAttrs)

textField.attributedPlaceholder = placeholder

Answer 11

這是@Medin Piranej上面提供的擴展的改進版本（順便說一句好主意！）。 如果您嘗試獲取placeHolderTextColor並且如果顏色集為nil則防止崩潰，則此版本可避免無限循環。

public extension UITextField {

@IBInspectable public var placeholderColor: UIColor? {
    get {
        if let attributedPlaceholder = attributedPlaceholder, attributedPlaceholder.length > 0 {
            var attributes = attributedPlaceholder.attributes(at: 0,
                                                              longestEffectiveRange: nil,
                                                              in: NSRange(location: 0, length: attributedPlaceholder.length))
            return attributes[NSForegroundColorAttributeName] as? UIColor
        }
        return nil
    }
    set {
        if let placeholderColor = newValue {
            attributedPlaceholder = NSAttributedString(string: placeholder ?? "",
                                                       attributes:[NSForegroundColorAttributeName: placeholderColor])
        } else {
            // The placeholder string is drawn using a system-defined color.
            attributedPlaceholder = NSAttributedString(string: placeholder ?? "")
        }
    }
}

}

Answer 12

對於swift 3，我們可以使用此代碼更改UITextfield的占位符文本顏色

 let placeholderColor = UIColor.red
 mytextField.attributedPlaceholder = NSAttributedString(string: mytextField.placeholder, attributes: [NSForegroundColorAttributeName : placeholderColor])

Answer 13

斯威夫特4

let placeholderColor = UIColor.red
self.passwordTextField?.attributedPlaceholder = 
NSAttributedString(string:"placeholderText", attributes: 
[NSAttributedStringKey.foregroundColor : placeholderColor])

Answer 14

[yourtextFieldName setValue:[UIColor lightGrayColor] forKeyPath:@"_placeholderLabel.textColor"];