下面是一个Swift代码，在UITextfield中提供填充

 func txtPaddingVw(txt:UITextField) {
     let paddingView = UIView(frame: CGRectMake(0, 0, 10, 10))
     txt.leftViewMode = .Always
     txt.leftView = paddingView
 }

调用using

self.txtPaddingVw(txtPin)

下面是一个Swift代码，在UITextfield中提供填充

 func txtPaddingVw(txt:UITextField) {
     let paddingView = UIView(frame: CGRectMake(0, 0, 10, 10))
     txt.leftViewMode = .Always
     txt.leftView = paddingView
 }

调用using

self.txtPaddingVw(txtPin)

@Evil trout的回答很棒。我使用这种方法已经有一段时间了。它唯一缺少的是“处理大量文本字段”。我尝试了其他方法，但似乎不奏效。

子类化UITextField只是为了添加填充对我来说没有任何意义。因此，我迭代了所有UITextFields来添加填充。

-(void) addPaddingToAllTextFields:(UIView*)view {

    for(id currentView in [view subviews]){
        if([currentView isKindOfClass:[UITextField class]]) {
            // Change value of CGRectMake to fit ur need
            [currentView setLeftView:[[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 20)]];
            [currentView setLeftViewMode:UITextFieldViewModeAlways];
        }

        if([currentView respondsToSelector:@selector(subviews)]){
            [textfieldarray addObjectsFromArray:[self addPaddingToAllTextFields:currentView]];
        }
    }
}

Swift 3解决方案

class CustomTextField: UITextField {

 override func textRect(forBounds bounds: CGRect) -> CGRect {
  return CGRect(x: bounds.origin.x + 10, y: bounds.origin.y + 8, width: bounds.size.width - 20, height: bounds.size.height - 16)
 }

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

只是UITextField的子类，像这样:

@implementation DFTextField


- (CGRect)textRectForBounds:(CGRect)bounds
{
    return CGRectInset(bounds, 10.0f, 0);
}

- (CGRect)editingRectForBounds:(CGRect)bounds
{
    return [self textRectForBounds:bounds];
}


@end

这增加了10点的水平填充两边。

基于Evil Trout的回答，你可能想要创建一个类别，使它更容易在多个应用程序中使用。

头文件:

@interface UITextField (PaddingText)

-(void) setLeftPadding:(int) paddingValue;

-(void) setRightPadding:(int) paddingValue;
@end

实现文件:

#import "UITextField+PaddingText.h"

@implementation UITextField (PaddingText)

-(void) setLeftPadding:(int) paddingValue
{
    UIView *paddingView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, paddingValue, self.frame.size.height)];
    self.leftView = paddingView;
    self.leftViewMode = UITextFieldViewModeAlways;
}

-(void) setRightPadding:(int) paddingValue
{
    UIView *paddingView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, paddingValue, self.frame.size.height)];
    self.rightView = paddingView;
    self.rightViewMode = UITextFieldViewModeAlways;
}

@end

使用的例子

#import "UITextField+PaddingText.h"

[self.YourTextField setLeftPadding:20.0f];

希望这对你们有所帮助

干杯