1.虽然各种直接获取信号强度的api都被封杀了。但是还有一个另类的黑魔法可以获取到。那就是遍历UIStatusBar了

网络上有的文章写的会崩溃 比如:

- (int)getSignalStrength{
if (iPhoneX) {
id statusBar = [[UIApplication sharedApplication] valueForKeyPath:@"statusBar"];
id statusBarView = [statusBar valueForKeyPath:@"statusBar"];
UIView *foregroundView = [statusBarView valueForKeyPath:@"foregroundView"];
int signalStrength = ;
NSArray *subviews = [[foregroundView subviews][] subviews];
for (id subview in subviews) {
if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarWifiSignalView")]) {
signalStrength = [[subview valueForKey:@"numberOfActiveBars"] intValue];
break;
}else if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarStringView")]) {
signalStrength = [[subview valueForKey:@"numberOfActiveBars"] intValue];
break;
}
}
return signalStrength;
} }

实测 iPhoneXSMAX 的 _UIStatusBarStringView 里面没有 numberOfActiveBars的值。所以又重新遍历,再xcode中断点看了一下。是需要在

_UIStatusBarPersistentAnimationView  这个图下面去取值就可以了 。。即

- (int)getSignalStrength{
if (iPhoneX) {
id statusBar = [[UIApplication sharedApplication] valueForKeyPath:@"statusBar"];
id statusBarView = [statusBar valueForKeyPath:@"statusBar"];
UIView *foregroundView = [statusBarView valueForKeyPath:@"foregroundView"];
int signalStrength = ;
NSArray *subviews = [[foregroundView subviews][] subviews];
for (id subview in subviews) {
if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarWifiSignalView")]) {
signalStrength = [[subview valueForKey:@"numberOfActiveBars"] intValue];
break;
}else if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarPersistentAnimationView")]) {
signalStrength = [[subview valueForKey:@"numberOfActiveBars"] intValue];
break;
}
}
return signalStrength;
} }
05-22 11:52
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