我想插入一个UITextField的文本。
这可能吗?
我想插入一个UITextField的文本。
这可能吗?
当前回答
下面是一个全面的Swift答案,包括一个leftView(自定义图标)和一个自定义清除按钮,两者都设置在界面生成器中,具有可定制的insets。
import UIKit
@IBDesignable
class InsetTextField: UITextField {
@IBInspectable var leftInset:CGFloat = 0
@IBInspectable var rightInset:CGFloat = 0
@IBInspectable var icon:UIImage? { didSet {
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 16, height: 16))
imageView.image = icon
self.leftView = imageView
self.leftViewMode = .Always
} }
@IBInspectable var clearButton:UIImage? { didSet {
let button = UIButton(type: .Custom)
button.setImage(clearButton, forState: .Normal)
button.addTarget(self, action: "clear", forControlEvents: UIControlEvents.TouchUpInside)
button.frame = CGRect(x: 0, y: 0, width: 18, height: 18)
self.rightView = button
self.rightViewMode = .WhileEditing
} }
func clear() {
self.text = ""
}
override func leftViewRectForBounds(bounds: CGRect) -> CGRect {
var height:CGFloat = 0
var width:CGFloat = 0
if let leftView = self.leftView {
height = leftView.bounds.height
width = leftView.bounds.width
}
return CGRect(x: leftInset, y: bounds.height/2 - height/2, width: width, height: height)
}
override func rightViewRectForBounds(bounds: CGRect) -> CGRect {
var height:CGFloat = 0
var width:CGFloat = 0
if let rightView = self.rightView {
height = rightView.bounds.height
width = rightView.bounds.width
}
return CGRect(x: bounds.width - width - rightInset, y: bounds.height/2 - height/2, width: width, height: height)
}
}
其他回答
我发现了罗伯托发布的选项。buratti是最快的解决方案,这里是Swift:
let leftView = UIView(frame: CGRect(x: 0, y: 0, width: 10, height: textField.frame.size.height))
leftView.backgroundColor = textField.backgroundColor
textField.leftView = leftView
textField.leftViewMode = UITextField.ViewMode.always
如果你想改变TOP和LEFT缩进只有这样
//占位符
- (CGRect)textRectForBounds:(CGRect)bounds {
CGRect frame = bounds;
frame.origin.y = 3;
frame.origin.x = 5;
bounds = frame;
return CGRectInset( bounds , 0 , 0 );
}
//文本位置
- (CGRect)editingRectForBounds:(CGRect)bounds {
CGRect frame = bounds;
frame.origin.y = 3;
frame.origin.x = 5;
bounds = frame;
return CGRectInset( bounds , 0 , 0 );
}
对于那些正在寻找更简单解决方案的人来说。
在UIView中添加UITextField。为了模拟文本框周围的插入,我保持左10像素,宽度比视图小20像素。对于文本框周围的圆角边框,请使用视图的边框
viewBG.layer.cornerRadius = 8.0;
viewBG.layer.borderColor = [UIColor darkGrayColor].CGColor;
viewBG.layer.borderWidth = 1.0;
快速解决没有子类&也检查
extension UITextField {
@IBInspectable var textInsets: CGPoint {
get {
return CGPoint.zero
}
set {
layer.sublayerTransform = CATransform3DMakeTranslation(newValue.x, newValue.y, 0);
}
}
}
我通常尽量避免子类化,但如果你已经:
// add a property
@property (nonatomic) UIEdgeInsets edgeInsets;
// and override:
- (CGRect)textRectForBounds:(CGRect)bounds
{
return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, self.edgeInsets)];
}
- (CGRect)editingRectForBounds:(CGRect)bounds
{
return [super editingRectForBounds:UIEdgeInsetsInsetRect(bounds, self.edgeInsets)];
}