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
你可以通过设置leftView来设置UITextField的文本插入。
是这样的:
UITextField *yourTextField = [[UITextField alloc] init];
UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 5)];
leftView.backgroundColor = [UIColor clearColor];
yourTextField.leftViewMode = UITextFieldViewModeAlways;
yourTextField.leftView = leftView;
其他回答
我子类化UITextField来处理这个,它支持左,上,右和底部的插入,以及清除按钮的定位。
MRDInsetTextField.h
#import <UIKit/UIKit.h>
@interface MRDInsetTextField : UITextField
@property (nonatomic, assign) CGRect inset;
@end
MRDInsetTextField.m
#import "MRDInsetTextField.h"
@implementation MRDInsetTextField
- (id)init
{
self = [super init];
if (self) {
_inset = CGRectZero;
}
return self;
}
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) {
_inset = CGRectZero;
}
return self;
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
_inset = CGRectZero;
}
return self;
}
- (void)setInset:(CGRect)inset {
_inset = inset;
[self setNeedsLayout];
}
- (CGRect)getRectForBounds:(CGRect)bounds withInset:(CGRect)inset {
CGRect newRect = CGRectMake(
bounds.origin.x + inset.origin.x,
bounds.origin.y + inset.origin.y,
bounds.origin.x + bounds.size.width - inset.origin.x - inset.size.width,
bounds.origin.y + bounds.size.height - inset.origin.y - inset.size.height
);
return newRect;
}
- (CGRect)textRectForBounds:(CGRect)bounds {
return [self getRectForBounds:[super textRectForBounds:bounds] withInset:_inset];
}
- (CGRect)placeholderRectForBounds:(CGRect)bounds {
return [self getRectForBounds:bounds withInset:_inset];
}
- (CGRect)editingRectForBounds:(CGRect)bounds {
return [self getRectForBounds:[super editingRectForBounds:bounds] withInset:_inset];
}
- (CGRect)clearButtonRectForBounds:(CGRect)bounds {
return CGRectOffset([super clearButtonRectForBounds:bounds], -_inset.size.width, _inset.origin.y/2 - _inset.size.height/2);
}
@end
*_someTextField*来自nib/storyboard视图,带有MRDInsetTextField自定义类的用法示例
[(MRDInsetTextField*)_someTextField setInset:CGRectMake(5, 0, 5, 0)]; // left, top, right, bottom inset
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;
在从UITextField派生的类中,至少重写以下两个方法:
- (CGRect)textRectForBounds:(CGRect)bounds;
- (CGRect)editingRectForBounds:(CGRect)bounds;
如果你没有额外的内容,它可能就像这样简单:
return CGRectInset(bounds , 10, 10);
UITextField提供了几个可以覆盖的定位方法。
我想我可以提供一个快速解决方案
import UIKit
class TextField: UITextField {
let inset: CGFloat = 10
// placeholder position
override func textRectForBounds(bounds: CGRect) -> CGRect {
return CGRectInset(bounds , inset , inset)
}
// text position
override func editingRectForBounds(bounds: CGRect) -> CGRect {
return CGRectInset(bounds , inset , inset)
}
override func placeholderRectForBounds(bounds: CGRect) -> CGRect {
return CGRectInset(bounds, inset, inset)
}
}
斯威夫特 3+
import UIKit
class TextField: UITextField {
let inset: CGFloat = 10
// placeholder position
override func textRect(forBounds: CGRect) -> CGRect {
return forBounds.insetBy(dx: self.inset , dy: self.inset)
}
// text position
override func editingRect(forBounds: CGRect) -> CGRect {
return forBounds.insetBy(dx: self.inset , dy: self.inset)
}
override func placeholderRect(forBounds: CGRect) -> CGRect {
return forBounds.insetBy(dx: self.inset, dy: self.inset)
}
}
@IBInspectable, @IBDesignable swift类怎么样?
@IBDesignable
class TextField: UITextField {
@IBInspectable var insetX: CGFloat = 6 {
didSet {
layoutIfNeeded()
}
}
@IBInspectable var insetY: CGFloat = 6 {
didSet {
layoutIfNeeded()
}
}
// placeholder position
override func textRectForBounds(bounds: CGRect) -> CGRect {
return CGRectInset(bounds , insetX , insetY)
}
// text position
override func editingRectForBounds(bounds: CGRect) -> CGRect {
return CGRectInset(bounds , insetX , insetY)
}
}
你会在你的故事板中看到这个。
更新- Swift 3
@IBDesignable
class TextField: UITextField {
@IBInspectable var insetX: CGFloat = 0
@IBInspectable var insetY: CGFloat = 0
// placeholder position
override func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: insetX, dy: insetY)
}
// text position
override func editingRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: insetX, dy: insetY)
}
}