在直播app开发中怎么样实现防止画面截屏

云豹科技-苏凌霄 / 2023-08-09 / 原文

在今天的数字时代，直播已成为我们生活中不可缺少的一部分，用户看直播从中找到乐趣，可以购买喜欢的东西，公司通过直播来扩大自己的影响力，在这个网络飞速发展的时代，为防止画面截屏在直播app开发中怎么样实现

首先声明下面的技术方案并非我的原创，也是通过百度搜索并验证是可行的，并把具体实现方式公布出来，希望可以帮到有同样需求的小伙伴门，共同进步~~

一、确定直播app开发的需求

需求：在直播app开发中所有画面添加防截屏、防录制的功能

解决依据是根据UITextField只要设置了setSecureTextEntry为true后，在进行录屏或者截屏的时候都会被系统隐去。由于我们直播app开发中即有非故事板画面又有故事板画面，所以只能一个画面一个画面的添加；也可以创建一个非故事板类型的超类，来负责自动替换根UIView。

二、直播app开发的解决方案：

1、直播app开发中如果是非故事板类型的ViewController，在viewDidLoad方法开始处将self.view替换为防截屏的UIView,参见下面的示例代码：

- (void)viewDidLoad {
    [super viewDidLoad];
    // 防截屏
    UITextField *bgTextField = [[UITextField alloc] init];
    [bgTextField setSecureTextEntry:true];
      
    UIView *bgView = bgTextField.subviews.firstObject;
    [bgView setUserInteractionEnabled:true];
    self.view = bgView;
 
    // 其它初始化代码
}

2、直播app开发中如果是故事板类型的ViwController的，需要将故事板中将UIView改为SecurityScreenShortView

（通过继承UIView后，在初始化方法中初始化防截屏安全区）即可，过程如下所示：

1）、打开故事板设计画面；

2）、选中相应ViewController的根UIView；

3）、在最右侧设计器中将Class中的UIView改为SecurityScreenShortView后保存即可

SecurityScreenShortView.h

//
//  SecurityScreenShortView.h
//
//  Created by 杜燕军 on 2022/8/1.
//
 
#import <UIKit/UIKit.h>
 
NS_ASSUME_NONNULL_BEGIN
API_AVAILABLE(ios(13.2))
@interface SecurityScreenShortView : UIView
 
@property (nonatomic, strong) UITextField *textField;
@property (nonatomic, strong) UIView *safeZone;
 
+ (UIView *)creactWithFrame:(CGRect)frame;
@end
NS_ASSUME_NONNULL_END

SecurityScreenShortView.m

//
//  SecurityScreenShortView.m
//
//  Created by 杜燕军 on 2022/8/1.
//
 
#import "SecurityScreenShortView.h"
 
@implementation SecurityScreenShortView
 
+ (UIView *)creactWithFrame:(CGRect)frame {
    return [[SecurityScreenShortView alloc] initWithFrame:frame];
}
 
- (instancetype)initWithCoder:(NSCoder *)coder {
    self = [super initWithCoder:coder];
    if (self) {
        [self addSafeZoneView];
    }
    return self;
}
 
- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self addSafeZoneView];
    }
    return self;
}
 
- (void)addSafeZoneView {
    [self addSubview:self.safeZone];
    
    UILayoutPriority lowPriority = UILayoutPriorityDefaultLow - 1;
    UILayoutPriority heightPriority = UILayoutPriorityDefaultHigh - 1;
 
    self.safeZone.translatesAutoresizingMaskIntoConstraints = NO;
    [self.safeZone setContentHuggingPriority:lowPriority forAxis:UILayoutConstraintAxisVertical];
    [self.safeZone setContentHuggingPriority:lowPriority forAxis:UILayoutConstraintAxisHorizontal];
    [self.safeZone setContentCompressionResistancePriority:heightPriority forAxis:UILayoutConstraintAxisVertical];
    [self.safeZone setContentCompressionResistancePriority:heightPriority forAxis:UILayoutConstraintAxisHorizontal];
    
    [self addConstraints:@[
        [NSLayoutConstraint constraintWithItem:self.safeZone attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTop multiplier:1 constant:0],
        [NSLayoutConstraint constraintWithItem:self.safeZone attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeBottom multiplier:1 constant:0],
        [NSLayoutConstraint constraintWithItem:self.safeZone attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeLeading multiplier:1 constant:0],
        [NSLayoutConstraint constraintWithItem:self.safeZone attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTrailing multiplier:1 constant:0],
    ]];
}
 
- (void)addSubview:(UIView *)view {
    if (self.safeZone == view) {
        [super addSubview:view];
    }else{
        [self.safeZone addSubview:view];
    }
}
 
- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index {
    if (self.safeZone == view) {
        [super insertSubview:view atIndex:index];
    }else{
        [self.safeZone insertSubview:view atIndex:index];
    }
}
 
- (void)insertSubview:(UIView *)view aboveSubview:(UIView *)siblingSubview {
    if (self.safeZone == view) {
        [super insertSubview:view aboveSubview:siblingSubview];
    }else{
        [self.safeZone insertSubview:view aboveSubview:siblingSubview];
    }
}
 
- (void)insertSubview:(UIView *)view belowSubview:(UIView *)siblingSubview {
    if (self.safeZone == view) {
        [super insertSubview:view belowSubview:siblingSubview];
    }else{
        [self.safeZone insertSubview:view belowSubview:siblingSubview];
    }
}
 
- (UITextField *)textField{
    if(!_textField){
        _textField = [[UITextField alloc]init];
        _textField.secureTextEntry = YES;
        _textField.enabled = NO;
    }
    return _textField;
}
 
- (UIView *)safeZone{
    if(!_safeZone){
      // 获取配置参数“是否开启防截屏”，默认值是0（未开启防截屏功能）此处不需要可以删除
      int noScreenShortEnable = [[ParamManager manager] getIntParam:@“noScreen” :0];
      if (noScreenShortEnable == 1) {
        // 防截屏
        _safeZone = self.textField.subviews.firstObject ?: [[UIView alloc] init];
        _safeZone.userInteractionEnabled = YES;
        for (UIView *v in _safeZone.subviews) {
            [v removeFromSuperview];
        }
      } else {
        // 非防截屏
        _safeZone = [[UIView alloc] init];
      }        
    }
    return _safeZone;
}
 
@end

故事板设置参照图