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
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 );
}
其他回答
下面是在Swift 3中编写的相同子类UITextField。它与之前的Swift版本有很大的不同,正如你将看到的:
import UIKit
class MyTextField: UITextField
{
let inset: CGFloat = 10
// placeholder position
override func textRect(forBounds bounds: CGRect) -> CGRect
{
return bounds.insetBy(dx: inset, dy: inset)
}
// text position
override func editingRect(forBounds bounds: CGRect) -> CGRect
{
return bounds.insetBy(dx: inset, dy: inset)
}
override func placeholderRect(forBounds bounds: CGRect) -> CGRect
{
return bounds.insetBy(dx: inset, dy: inset)
}
}
顺便说一句,如果你只想控制一侧的插入,你也可以像下面这样做。如果你把一个图像放在UITextField的顶部,但你想让它在用户看来是在文本框中,那么这个只调整左边插图的特殊例子就很方便了:
override func editingRect(forBounds bounds: CGRect) -> CGRect
{
return CGRect.init(x: bounds.origin.x + inset, y: bounds.origin.y, width: bounds.width - inset, height: bounds.height)
}
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;
Swift 4.2版本:
import UIKit
class InsetTextField: UITextField {
let inset: CGFloat = 10
override func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: inset, dy: inset)
}
override func editingRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: inset, dy: inset)
}
override func placeholderRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: inset, dy: inset)
}
}
如果你只需要左边空白,你可以试试这个:
UItextField *textField = [[UITextField alloc] initWithFrame:...];
UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, textField.frame.size.height)];
leftView.backgroundColor = textField.backgroundColor;
textField.leftView = leftView;
textField.leftViewMode = UITextFieldViewModeAlways;
这对我很管用。我希望这能有所帮助。
为UITextField添加填充的一个好方法是子类化UITextField并添加一个edgeInsets属性。然后设置edgeInsets和UITextField将相应地绘制。对于自定义的leftView或rightView集,这也能正确地发挥作用。
OSTextField.h
#import <UIKit/UIKit.h>
@interface OSTextField : UITextField
@property (nonatomic, assign) UIEdgeInsets edgeInsets;
@end
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