判断是否为刘海屏，不应该只判断iPhone上的情况还应该判断iPad上的情况。iPad在iOS12已经更改了状态栏，成为时间不居中的类型。这一类也属于刘海屏。
在适配界面的时候，可以不考虑这类iPad的情况。如果通过判断刘海屏来访问状态栏的私有变量的时候，会出现崩溃的情况。在这里笔者建议访问私有变量，应该使用异常。如果访问私有变量失败会触发异常，却不会引起App的崩溃。一旦线上的App崩溃将造成很不友好的体验。
- (BOOL)isLiuHaiScreen
{
if (@available(iOS 11.0, *)) {
if (@available(iOS 12.0, *) && [UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
return YES;
}
UIEdgeInsets safeAreaInsets = [UIApplication sharedApplication].windows[0].safeAreaInsets;
return safeAreaInsets.top == liuHaiHeight || safeAreaInsets.bottom == liuHaiHeight || safeAreaInsets.left == liuHaiHeight || safeAreaInsets.right == liuHaiHeight;
}else {
return NO;
}
}
在我的实际项目中，碰见访问状态栏的私有变量来判断网络状态的情况。笔者前期使用到了异常来控制私有变量
#pragma mark 获取当前网络类型
+ (NSString *)getNetworkType
{
UIApplication *app = [UIApplication sharedApplication];
id statusBar = nil;
// 判断是否是iOS 13
NSString *network = @"";
if (@available(iOS 13.0, *)) {
UIStatusBarManager *statusBarManager = [UIApplication sharedApplication].keyWindow.windowScene.statusBarManager;
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"
if ([statusBarManager respondsToSelector:@selector(createLocalStatusBar)]) {
UIView *localStatusBar = [statusBarManager performSelector:@selector(createLocalStatusBar)];
if ([localStatusBar respondsToSelector:@selector(statusBar)]) {
statusBar = [localStatusBar performSelector:@selector(statusBar)];
}
}
#pragma clang diagnostic pop
if (statusBar) {
// UIStatusBarDataCellularEntry
id currentData = [[statusBar valueForKeyPath:@"_statusBar"] valueForKeyPath:@"currentData"];
id _wifiEntry = [currentData valueForKeyPath:@"wifiEntry"];
id _cellularEntry = [currentData valueForKeyPath:@"cellularEntry"];
if (_wifiEntry && [[_wifiEntry valueForKeyPath:@"isEnabled"] boolValue]) {
// If wifiEntry is enabled, is WiFi.
network = @"WIFI";
} else if (_cellularEntry && [[_cellularEntry valueForKeyPath:@"isEnabled"] boolValue]) {
NSNumber *type = [_cellularEntry valueForKeyPath:@"type"];
if (type) {
switch (type.integerValue) {
case 0:
// 无sim卡
network = @"NONE";
break;
case 1:
network = @"1G";
break;
case 4:
network = @"3G";
break;
case 5:
network = @"4G";
break;
default:
// 默认WWAN类型
network = @"WWAN";
break;
}
}
}
}
}else {
statusBar = [app valueForKeyPath:@"statusBar"];
if ([[[self alloc]init]isLiuHaiScreen]) {
// 刘海屏
id statusBarView = [statusBar valueForKeyPath:@"statusBar"];
UIView *foregroundView = [statusBarView valueForKeyPath:@"foregroundView"];
NSArray *subviews = [[foregroundView subviews][2] subviews];
if (subviews.count == 0) {
// iOS 12
id currentData = [statusBarView valueForKeyPath:@"currentData"];
id wifiEntry = [currentData valueForKey:@"wifiEntry"];
if ([[wifiEntry valueForKey:@"_enabled"] boolValue]) {
network = @"WIFI";
}else {
// 卡1:
id cellularEntry = [currentData valueForKey:@"cellularEntry"];
// 卡2:
id secondaryCellularEntry = [currentData valueForKey:@"secondaryCellularEntry"];
if (([[cellularEntry valueForKey:@"_enabled"] boolValue]|[[secondaryCellularEntry valueForKey:@"_enabled"] boolValue]) == NO) {
// 无卡情况
network = @"NONE";
}else {
// 判断卡1还是卡2
BOOL isCardOne = [[cellularEntry valueForKey:@"_enabled"] boolValue];
int networkType = isCardOne ? [[cellularEntry valueForKey:@"type"] intValue] : [[secondaryCellularEntry valueForKey:@"type"] intValue];
switch (networkType) {
case 0://无服务
network = [NSString stringWithFormat:@"%@-%@", isCardOne ? @"Card 1" : @"Card 2", @"NONE"];
break;
case 3:
network = [NSString stringWithFormat:@"%@-%@", isCardOne ? @"Card 1" : @"Card 2", @"2G/E"];
break;
case 4:
network = [NSString stringWithFormat:@"%@-%@", isCardOne ? @"Card 1" : @"Card 2", @"3G"];
break;
case 5:
network = [NSString stringWithFormat:@"%@-%@", isCardOne ? @"Card 1" : @"Card 2", @"4G"];
break;
default:
break;
}
}
}
}else {
for (id subview in subviews) {
if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarWifiSignalView")]) {
network = @"WIFI";
}else if ([subview isKindOfClass:NSClassFromString(@"_UIStatusBarStringView")]) {
network = [subview valueForKeyPath:@"originalText"];
}
}
}
}else {
// 非刘海屏
NSArray *subviews;
@try {
UIView *foregroundView = [statusBar valueForKeyPath:@"foregroundView"];
subviews = [foregroundView subviews];
} @catch (NSException *exception) {
subviews = [[[[[UIApplication sharedApplication] valueForKeyPath:@"_statusBar"] valueForKeyPath:@"_statusBar"] valueForKeyPath:@"foregroundView"] subviews];
} @finally {
}
for (id subview in subviews) {
if ([subview isKindOfClass:NSClassFromString(@"UIStatusBarDataNetworkItemView")]) {
int networkType = [[subview valueForKeyPath:@"dataNetworkType"] intValue];
switch (networkType) {
case 0:
network = @"NONE";
break;
case 1:
network = @"2G";
break;
case 2:
network = @"3G";
break;
case 3:
network = @"4G";
break;
case 5:
network = @"WIFI";
break;
default:
break;
}
}
}
}
}
if ([network isEqualToString:@""]) {
network = @"NO DISPLAY";
}
return network;
}
这里并没有判断iPhone12的5G网络状态，所以并不是很全面。
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