为什么我无法获取 UIStatusBarSignalStrengthItemView？

Question

为了获取 iphone 上的 wifi 或蜂窝信号强度，我写了以下代码作为各种网站的参考，但它不出现在 IF 语句中 "UIStatusBarSignalStrengthItemView" 或“_UIStatusBarCellularSignalView”。

您需要许可吗？

■开发环境

Xcode9.4.1

iPhoneX‖iOS:11.0.1

■Test1.m

#import "Test1.h"
@implementation Test1 : NSObject 

- (int)antennaBar
{

    NSLog(@"%@",[[[UIApplication sharedApplication]     valueForKeyPath:@"statusBar"] subviews]);

    NSLog(@"antennaBar 1");
    NSLog(@"antennaBar 2");
//    NSArray *subviews = [[[apps valueForKey:@"statusBar"]     valueForKey:@"foregroundView"] subviews];
    NSArray *subviews = nil;
    NSLog(@"antennaBar 3");
    id statusBar = [[UIApplication sharedApplication] valueForKey:@"statusBar"];
    NSLog(@"antennaBar 4");
    if ([statusBar isKindOfClass:NSClassFromString(@"UIStatusBar_Modern")]) {
        NSLog(@"antennaBar 5");
    subviews = [[[statusBar valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
} else {
    NSLog(@"antennaBar 6");
    subviews = [[statusBar valueForKey:@"foregroundView"] subviews];
}
NSLog(@"antennaBar 7");
NSString *dataNetworkItemView = nil;

NSLog(@"antennaBar 8");
for (id subview in subviews) {

    NSLog(@"Class - %@", NSStringFromClass([subview class]));

    NSLog(@"antennaBar aaaaaaa");
    if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarSignalStrengthItemView") class]]) {
        NSLog(@"antennaBar bbbbbb");
        dataNetworkItemView = subview;
        break;
    }
    if([subview isKindOfClass:[NSClassFromString(@"_UIStatusBarCellularSignalView") class]]) {
        NSLog(@"antennaBar eeeeee");
        dataNetworkItemView = subview;

        int fffff = [subview valueForKey:@"numberOfActiveBars"];
        NSLog(@"fffff=%d",fffff);
        break;
    }
}

for (id subview in subviews)
{
    NSLog(@"antennaBar cccccc");
    if([subview isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]])
    {
        NSLog(@"antennaBar dddddd");
        [(NSNumber*)[subview valueForKey:@"dataNetworkType"] intValue];
    }
}

NSLog(@"antennaBar 9");


NSLog(@"12345");
id statusBaraaaa = [[UIApplication sharedApplication] valueForKey:@"statusBar"];
NSArray *children = nil;
NSLog(@"23456");
children = [[[statusBaraaaa valueForKey:@"statusBar"] valueForKey:@"foregroundView"] subviews];
NSLog(@"34567");
int type = 0;
NSLog(@"45678");
for (id child in children) {
    NSLog(@"56789");
    if ([child isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {
        NSLog(@"67890");
        type = [[child valueForKeyPath:@"dataNetworkType"] intValue];
    }
}

if (type == 0) {
    return NO;
}else{
    return YES;
}

int aaa = [[dataNetworkItemView valueForKey:@"signalStrengthBars"] intValue];


NSLog(@"aaa=%d",aaa);

return aaa;
}

@end

■Test1.h

#import <Foundation/Foundation.h>
#import "UIKit/UIKit.h"

@interface Test1 : NSObject
- (int)antennaBar;
@end

■注销

( "<_UIStatusBar: 0x14e809020: regions={\n bottomLeading = \"<_UIStatusBarRegion: 0x1d013bd00: identifier=bottomLeading, enabled=1, displayItems={(\n)}>\";\n expandedLeading = \"<_UIStatusBarRegion: 0x1d013bbc0 : identifier=expandedLeading, enabled=0, displayItems={(\n)}>\";\n expandedTrailing = \"<_UIStatusBarRegion: 0x1d013bc60: identifier=expandedTrailing, enabled=0, displayItems={(\n)}>\ ";\n leading = \"<_UIStatusBarRegion: 0x1d013b940: identifier=leading, enabled=1, displayItems={(\n <_UIStatusBarDisplayItem: 0x1d019b450: identifier=_UIStatusBarTimeItem.shortTimeDisplayIdentifier, item=<_UIStatusBarTimeItem: 0x1d046c700: identifier=_UIStatusBarTimeItem >, view=<_UIStatusBarStringView: 0x14e825ae0; frame = (14.3333 3.66667; 38.3333 18); text = '12:10'; userInteractionEnabled = NO; layer = <_UILabelLayer: 0x1d0281f40>>>\n)}>\";\n pill = \"<_UIStatusBarRegion: 0x1d013b8a0: identifier=pill, enabled=0, displayItems={(\n)}>\";\n systemUpdates = \"<_UIStatusBarRegion: 0x1d0

1

2

3

4

5

7

8

Class - UIView

aaaaaaa

Class - UIView

aaaaaaa

Class - UIView

aaaaaaa

Class - UIView

aaaaaaa

Class - UIView

aaaaaaa

Class - UIView

aaaaaaa

cccccc

9

12345

23456

34567

45678

56789

Answer 1

虽然通过检查状态栏视图层次结构获取信号强度在 iOS 的某些先前版本中有效，但自 iOS 11 起不再有效。此外，依赖内部意见是（并且一直是）在应用商店审查过程中被拒绝的理由。

不支持获取蜂窝信号强度的方法。资料来源：comment on Apple Developer Forum。唯一支持的获取 WiFi 信号强度的方法是使用 NEHotspotNetwork signalStrength 属性。但是这个属性只适用于热点助手应用，requires a special entitlement.

Answer 2

您可以检索活动条的数量、可能的条数以及用户是连接到 wifi 还是蜂窝网络。（我相信这就是 "mode" 属性/ iVar 的用途。）

我已经使用 inactive 和 activeColor 方法根据信号强度设置 wifi 和蜂窝数据的颜色，而不使用活动条的数量，因为它是视觉表示的。当然，我在越狱设备上做了一个调整，使用这个 API 没有很好地隐藏它可以让你的应用程序被拒绝。但是无论如何，请尝试使用 _UIStatusBarSignalView 来获取您需要的信息（当然仅用于测试目的）。我认为这只适用于现代状态栏/iPhone X 类型。

    @interface _UIStatusBarSignalView : UIView <_UIStatusBarDisplayable> {
BOOL _smallSize;
BOOL _visible;
long long _numberOfBars;
long long _numberOfActiveBars;
long long _signalMode;
UIColor* _inactiveColor;
UIColor* _activeColor;

 }

 @property (assign,nonatomic) long long numberOfBars;                                                            
 //@synthesize numberOfBars=_numberOfBars - In the implementation block
 @property (assign,nonatomic) long long numberOfActiveBars; 
/* You can use this compared to the output of numberOfBars property to get a     
good idea of signal strength. */
//@synthesize numberOfActiveBars=_numberOfActiveBars - In the implementation    
//block
@property (assign,nonatomic) long long signalMode;  
 //...(more to the interface)
@end

完整的界面可以在这里找到，我可以确认它在 iPhone X 的 iOS 12.4 上工作，即使 class 转储来自 11.1.2。 http://developer.limneos.net/?ios=11.1.2&framework=UIKit.framework&header=_UIStatusBarSignalView.h

为什么我无法获取 UIStatusBarSignalStrengthItemView？

Why can not I get UIStatusBarSignalStrengthItemView?

xcode

objective-c

signal-strength

ios