iOS12适配及问题记录

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ios12适配及问题记录

版本信息

Xcode: Version 10.0 beta (10L176w)
macOS: 10.14 Beta (18A293u)
iOS: 12.0(16A5288q)

问题及解决过程

1,StatusBar内部结构改变

现象:crash

crash log:

-[_UIStatusBarIdentifier isEqualToString:]: unrecognized selector sent to instance 0x283452820

*** Terminating app due to uncaught exception ‘NSInvalidArgumentException’, reason: ‘-[_UIStatusBarIdentifier isEqualToString:]: unrecognized selector sent to instance 0x283452820’

—————————————————————————————————————————————————————

问题代码和解决方法


+ (NSString *)getIphoneXNetWorkStates     
    UIApplication *app = [UIApplication sharedApplication];
    id statusBar = [[app valueForKeyPath:@"statusBar"] valueForKeyPath:@"statusBar"];
    id one = [statusBar valueForKeyPath:@"regions"];
    id two = [one valueForKeyPath:@"trailing"];
    NSArray *three = [two valueForKeyPath:@"displayItems"];
    NSString *state = @"无网络";
    for (UIView *view in three) 
        //alert: iOS12.0 情况下identifier的变成了类"_UIStatusBarIdentifier"而不是NSString,所以会在调用“isEqualToString”方法时发生crash,
        //修改前
//        NSString *identifier = [view valueForKeyPath:@"identifier"];
        //修改后
        NSString *identifier = [[view valueForKeyPath:@"identifier"] description];
        if ([identifier isEqualToString:@"_UIStatusBarWifiItem.signalStrengthDisplayIdentifier"]) 
            id item = [view valueForKeyPath:@"_item"];
            
            //alert: 这个问题和上边一样itemId是_UIStatusBarIdentifier 类型,不是string
            NSString *itemId = [[item valueForKeyPath:@"identifier"] description];
            if ([itemId isEqualToString:@"_UIStatusBarWifiItem"]) 
                state = @"WIFI";
            
            state = @"不确定";
            
         else if ([identifier isEqualToString:@"_UIStatusBarCellularItem.typeDisplayIdentifier"]) 
            UIView *statusBarStringView = [view valueForKeyPath:@"_view"];
            // 4G/3G/E
            state = [statusBarStringView valueForKeyPath:@"text"];
        

    
    
    return state;

2,[UIImage imageNamed:]不能正常加载Assets中的图片

解决:
将图片放到bundle中
使用一下方式加载即可

NSString *path = [[NSBundle mainBundle] pathForResource:@"bg_login" ofType:@"png"];
_backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageWithContentsOfFile:path]];

这个不能正常加载的情况只出现在个别的地方,目前找到的共性是加载的图片偏大,其他并没有头绪,感觉像是测试版本的Bug,google也没有人解答此类问题,后续会继续关注。

iOS12、iOS11 iPhone X等刘海屏幕适配WKWebView 问题。

在项目中发现一个很恶心的问题,在WKWebView中输入内容,键盘弹起后收回,view的底部会向上偏移,并且可视区域减小,如图:

键盘弹起

键盘收回

可以看到底部会有很大的留白。

解决方法:

方法1:

H5中:

meta标签中不要使用viewport-fit=cover"
如下:

<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no>

在input组件失去焦点时将窗口滑动到(0,0)

如下:

$('input').on("blur",function (e) 
	window.scrollTo(0,0);
);

方法2:

meta标签中不要使用viewport-fit=cover"
如下:

<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no>

nativeWKWebview所在controller监听键盘将要收起动作,调用WKWebview中的滚动视图,修改其ContentOffset属性. 如下:

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide) name:UIKeyboardWillHideNotification object:nil];

- (void)keyboardWillHide 
    // 解决iOS11在WKWebview中键盘收回时将可视区域上移问题
    if (@available(iOS 11.0, *)) 
        WKWebView *webview = (WKWebView*)self.webView;
        for(UIView* v in webview.subviews)
            if([v isKindOfClass:NSClassFromString(@"WKScrollView")])
                UIScrollView *scrollView = (UIScrollView*)v;
                [scrollView setContentOffset:CGPointMake(0, 0)];
            
        
    


iOS12.0.x serviceSubscriberCellularProviders Crash

获取Sim 卡信息crash

@property(readonly, retain, nullable) NSDictionary<NSString *, CTCarrier *> *serviceSubscriberCellularProviders API_AVAILABLE(ios(12.0), watchos(5.0)) API_UNAVAILABLE(macos, tvos);

定义说名在iOS12.0开始就可以用了,但是在12.0.x的系统中会在运行时找不到此方法而crash

解决方法

经调查发现,这是Apple的官方bug,在iOS12.1.x修复了此问题,所以代码如下解决


/**
 #import <CoreTelephony/CTTelephonyNetworkInfo.h>
 #import <CoreTelephony/CTCarrier.h>
 sim卡信息
 */
+ (NSDictionary *)getSIMCardInfo
    CTTelephonyNetworkInfo *info = [[CTTelephonyNetworkInfo alloc] init];
    CTCarrier *carrier = nil;
    NSString *radioType = nil;
    if (@available(iOS 12.1, *)) 
        
        if (info && [info respondsToSelector:@selector(serviceSubscriberCellularProviders)]) 
            
            NSDictionary *dic = [info serviceSubscriberCellularProviders];
            if (dic.allKeys.count) 
                carrier = [dic objectForKey:dic.allKeys[0]];
            
        
        
        if (info && [info respondsToSelector:@selector(serviceCurrentRadioAccessTechnology)]) 
            
            NSDictionary *radioDic = [info serviceCurrentRadioAccessTechnology];
            if (radioDic.allKeys.count) 
                radioType = [radioDic objectForKey:radioDic.allKeys[0]];
            
        
        
        
     else 
        carrier = [info subscriberCellularProvider];
        radioType = [info currentRadioAccessTechnology];

    
    
    //运营商可用
    BOOL use = carrier.allowsVOIP;
    //运营商名字
    NSString *name = carrier.carrierName;
    //ISO国家代码
    NSString *code = carrier.isoCountryCode;
    //移动国家代码
    NSString *mcc = [carrier mobileCountryCode];
    //移动网络代码
    NSString *mnc = [carrier mobileNetworkCode];
    return @
             UCAnalysis_SIMCardInfoKey_AllowsVOIP:@(use),
             UCAnalysis_SIMCardInfoKey_CarrierName:name?:@"NONE",
             UCAnalysis_SIMCardInfoKey_ISOCountryCode:code?:@"NONE",
             UCAnalysis_SIMCardInfoKey_MobileCountryCode:mcc?:@"NONE",
             UCAnalysis_SIMCardInfoKey_MobileNetworkCode:mnc?:@"NONE",
             UCAnalysis_SIMCardInfoKey_RadioAccessTechnology:radioType?:@"NONE"
             ;

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