UITextField内容缩进

1.把UITextField的leftView当做填充位置，实现文字偏移

// 创建一个占位的 view
UIView *leftV = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 21)];
UITextField *pwdTF = [[UITextField alloc] init];
pwdTF.leftView = leftV;   // 设置 TF 的 leftView 为 leftV
pwdTF.leftViewMode = UITextFieldViewModeAlways;
[self.view addSubview:pwdTF];

//UITextFieldViewModeNever   不展示
//UITextFieldViewModeWhileEditing   编辑时展示
//UITextFieldViewModeUnlessEditing   编辑时不展示
//UITextFieldViewModeAlways   一直展示

2.继承UITextfield，覆盖父类方法！

#import <UIKit/UIKit.h>
 
@interface InsetsTextField : UITextField
- (CGRect)textRectForBounds:(CGRect)bounds;
- (CGRect)editingRectForBounds:(CGRect)bounds;
@end

#import "InsetsTextField.h"
 
@implementation InsetsTextField
 
//控制文本所在的的位置，左右缩 10
- (CGRect)textRectForBounds:(CGRect)bounds {
    return CGRectInset( bounds , 10 , 0 );
}
 
//控制编辑文本时所在的位置，左右缩 10
- (CGRect)editingRectForBounds:(CGRect)bounds {
    return CGRectInset( bounds , 10 , 0 );
}
 
@end

转载自：https://blog.csdn.net/coslay/article/details/42266663