Question

我的问题就像标题一样简单，但这里还有一点：

我有一个UITextField，我在其上设置了背景图像。问题是文本紧贴着它的边缘，这也是图像的边缘。我希望我的文本字段看起来像Apple，在背景图像和文本开始之间有一些水平空间。

Answer 1

这是我在没有做任何子类的情况下找到的最快的方式：

UIView *spacerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 10)];
[textfield setLeftViewMode:UITextFieldViewModeAlways];
[textfield setLeftView:spacerView];

在斯威夫特：

let spacerView = UIView(frame:CGRect(x:0, y:0, width:10, height:10))
textField.leftViewMode = UITextFieldViewMode.Always
textField.leftView = spacerView

Answer 2

您必须子类化并覆盖textRectForBounds：和editingRectForBounds：。这是一个UITextfield子类，具有自定义背景和垂直和水平填充：

@interface MyUITextField : UITextField 
@property (nonatomic, assign) float verticalPadding;
@property (nonatomic, assign) float horizontalPadding;
@end

#import "MyUITextField.h"
@implementation MyUITextField
@synthesize horizontalPadding, verticalPadding;
- (CGRect)textRectForBounds:(CGRect)bounds {
    return CGRectMake(bounds.origin.x + horizontalPadding, bounds.origin.y + verticalPadding, bounds.size.width - horizontalPadding*2, bounds.size.height - verticalPadding*2);
}
- (CGRect)editingRectForBounds:(CGRect)bounds {
    return [self textRectForBounds:bounds];
}
@end

用法：

UIImage *bg = [UIImage imageNamed:@"textfield.png"];
CGRect rect = CGRectMake(0, 0, bg.size.width, bg.size.height);
MyUITextField *textfield = [[[MyUITextField alloc] initWithFrame:rect] autorelease];
textfield.verticalPadding = 10; 
textfield.horizontalPadding = 10;
[textfield setBackground:bg];
[textfield setBorderStyle:UITextBorderStyleNone];
[self.view addSubview:textfield];

Answer 3

向UITextField添加填充的一种好方法是将UITextField子类化，覆盖矩形方法并添加edgeInsets属性。然后，您可以设置edgeInsets，并相应地绘制UITextField。这也可以使用自定义leftView或rightView设置正确运行。

<强> OSTextField.h

#import <UIKit/UIKit.h>

@interface OSTextField : UITextField

@property (nonatomic, assign) UIEdgeInsets edgeInsets;

@end

<强> OSTextField.m

#import "OSTextField.h"

@implementation OSTextField

- (id)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
        self.edgeInsets = UIEdgeInsetsMake(0, 0, 0, 0);
    }
    return self;
}

-(id)initWithCoder:(NSCoder *)aDecoder{
    self = [super initWithCoder:aDecoder];
    if(self){
        self.edgeInsets = UIEdgeInsetsMake(0, 0, 0, 0);
    }
    return self;
}

- (CGRect)textRectForBounds:(CGRect)bounds {
    return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, self.edgeInsets)];
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    return [super editingRectForBounds:UIEdgeInsetsInsetRect(bounds, self.edgeInsets)];
}

@end

Answer 4

我把它变成了一个很好的小扩展，可以在Storyboards中使用：

public extension UITextField {
    @IBInspectable public var leftSpacer:CGFloat {
        get {
            if let l = leftView {
                return l.frame.size.width
            } else {
                return 0
            }
        } set {
            leftViewMode = .Always
            leftView = UIView(frame: CGRect(x: 0, y: 0, width: newValue, height: frame.size.height))
        }
    }
}

Answer 5

我的2美分：

class PaddedTextField : UITextField {
    var insets = UIEdgeInsets.zero
    var verticalPadding:CGFloat = 0
    var horizontalPadding:CGFloat = 0

    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return CGRect(x: bounds.origin.x + insets.left, y: bounds.origin.y + insets.top, width: bounds.size.width - (insets.left + insets.right), height: bounds.size.height - (insets.top + insets.bottom));
    }

    override func editingRect(forBounds bounds: CGRect) -> CGRect {
        return textRect(forBounds: bounds)
    }
}

Answer 6

我建议您将UITextField转换为UITextView并设置contentInset。例如，缩进10个空格：

textview.contentInset=UIEdgeInsetsMake(0, 10, 0, 0);

Answer 7

有时textField的leftView是Apple的放大镜图像。如果是这样，您可以设置这样的缩进：

    UIView *leftView = textField.leftView;
    if (leftView && [leftView isKindOfClass:[UIImageView class]]) {
        leftView.contentMode = UIViewContentModeCenter;
        leftView.width = 20.0f;  //the space you want indented.
    }

Answer 8

如果您不想创建@ IBOutlet，可以简单地子类化（在Swift中回答）：

class PaddedTextField: UITextField {

  override func awakeFromNib() {
      super.awakeFromNib()

      let spacerView = UIView(frame:CGRect(x: 0, y: 0, width: 10, height: 10))
      leftViewMode = .always
      leftView = spacerView
   }
}

缩进UITextField中的文本

8 个答案: