在项目中,为了好的用户体验,有些场景必须线判断网络状态,然后才能决定该干嘛。比如视频播放,需要线判断是Wifi还是4G,Wifi直接播放,4G先提示用户。获取网络状态的方法大概有三种:
1. Reachability
这是苹果的官方演示demo中使用到的方法,我们可以到苹果官方文档里下载Demo(点击左上角Download Sample Code 即可下载),然后把Demo里的Reachability.h和.m考到自己项目中,并在Build Phases 的 Link Binary 添加SystemConfiguration.framework框架,然后在需要使用的地方导入Reachability头文件
在 Reachability头文件中我们可以看到无网络,wifi和蜂窝网三个网络状态的枚举值,如下:
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typedef enum : NSInteger {
NotReachable = 0,
ReachableViaWiFi,
ReachableViaWWAN
} NetworkStatus;
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(1)获取网络状态
在iOS 7之前,当用户网络为蜂窝网络时,是没法判断3G、4G等网络类型的,iOS 7 后是可以判断的
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(NSString *)internetStatus {
Reachability *reachability = [Reachability reachabilityWithHostName:@ "www.apple.com" ];
NetworkStatus internetStatus = [reachability currentReachabilityStatus];
NSString *net = @ "WIFI" ;
switch (internetStatus) {
case ReachableViaWiFi:
net = @ "WIFI" ;
break ;
case ReachableViaWWAN:
net = @ "蜂窝数据" ;
//net = [self getNetType ]; //判断具体类型
break ;
case NotReachable:
net = @ "当前无网路连接" ;
default :
break ;
}
return net;
}
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(2)当用户为手机自带网络时,判断具体网络类型
这时可以使用系统自带的API来判断是2G、3G还是4G,这就要使用到CTTelephonyNetworkInfo这类,记得在工程添加CoreTelephony.framework,并导入头文件
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- (NSString *)getNetType
{
CTTelephonyNetworkInfo *info = [[CTTelephonyNetworkInfo alloc] init];
NSString *currentStatus = info.currentRadioAccessTechnology;
if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyGPRS" ]) {
netconnType = @ "GPRS" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyEdge" ]) {
netconnType = @ "2.75G EDGE" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyWCDMA" ]){
netconnType = @ "3G" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyHSDPA" ]){
netconnType = @ "3.5G HSDPA" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyHSUPA" ]){
netconnType = @ "3.5G HSUPA" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyCDMA1x" ]){
netconnType = @ "2G" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyCDMAEVDORev0" ]){
netconnType = @ "3G" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyCDMAEVDORevA" ]){
netconnType = @ "3G" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyCDMAEVDORevB" ]){
netconnType = @ "3G" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyeHRPD" ]){
netconnType = @ "HRPD" ;
} else if ([currentStatus isEqualToString:@ "CTRadioAccessTechnologyLTE" ]){
netconnType = @ "4G" ;
}
}
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用此方法判断的蜂窝网络类型有如下类型:
CTRadioAccessTechnologyGPRS //介于2G和3G之间,也叫2.5G ,过度技术
CTRadioAccessTechnologyEdge //EDGE为GPRS到第三代移动通信的过渡,EDGE俗称2.75G
CTRadioAccessTechnologyWCDMA
CTRadioAccessTechnologyHSDPA //亦称为3.5G(3?G)
CTRadioAccessTechnologyHSUPA //3G到4G的过度技术
CTRadioAccessTechnologyCDMA1x //3G
CTRadioAccessTechnologyCDMAEVDORev0 //3G标准
CTRadioAccessTechnologyCDMAEVDORevA
CTRadioAccessTechnologyCDMAEVDORevB
CTRadioAccessTechnologyeHRPD //电信使用的一种3G到4G的演进技术, 3.75G
CTRadioAccessTechnologyLTE //接近4G
2. 通过系统statusBar判断
这种方法在iPhone X 上可能引起奔溃,可能是苹果修改了statusBar的keyPath,所以拿到的东西为nil,导致崩溃//获取当前网络状态 (iPhone X 上可能引发崩溃)
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+ (NSString *)networkingStatesFromStatebar {
// 状态栏是由当前app控制的,首先获取当前app
UIApplication *app = [UIApplication sharedApplication];
//iphone X 会在这里崩溃
NSArray *children = [[[app valueForKeyPath:@ "statusBar" ] valueForKeyPath:@ "foregroundView" ] subviews];
int type = 0;
for (id child in children) {
if ([child isKindOfClass:[NSClassFromString(@ "UIStatusBarDataNetworkItemView" ) class ]]) {
type = [[child valueForKeyPath:@ "dataNetworkType" ] intValue];
}
}
NSString *stateString = @ "wifi" ;
switch (type) {
case 0:
stateString = @ "notReachable" ;
break ;
case 1:
stateString = @ "2G" ;
break ;
case 2:
stateString = @ "3G" ;
break ;
case 3:
stateString = @ "4G" ;
break ;
case 4:
stateString = @ "LTE" ;
break ;
case 5:
stateString = @ "wifi" ;
break ;
default :
break ;
}
return stateString;
}
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3. 通过AFNetworking
此方法可以写在AppDelegate中,每当网络状态发生变化时,就可以发通知,实时监测网络变化,然后做相应的处理
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#pragma mark - ------------- 监测网络状态 -------------
- ( void )monitorNetworking
{
[[AFNetworkReachabilityManager sharedManager] startMonitoring];
[[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
switch (status) {
case -1:
NSLog(@ "未知网络" );
break ;
case 0:
NSLog(@ "网络不可达" );
break ;
case 1:
{
NSLog(@ "GPRS网络" );
//发通知,带头搞事
[[NSNotificationCenter defaultCenter] postNotificationName:@ "monitorNetworking" object:@ "1" userInfo:nil];
}
break ;
case 2:
{
NSLog(@ "wifi网络" );
//发通知,搞事情
[[NSNotificationCenter defaultCenter] postNotificationName:@ "monitorNetworking" object:@ "2" userInfo:nil];
}
break ;
default :
break ;
}
if (status == AFNetworkReachabilityStatusReachableViaWWAN || status == AFNetworkReachabilityStatusReachableViaWiFi) {
NSLog(@ "有网" );
} else {
NSLog(@ "没网" );
}
}];
}
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以上就是详解IOS判断当前网络状态的三种方法的详细内容,更多关于IOS判断当前网络状态的资料请关注服务器之家其它相关文章!
原文链接:https://blog.csdn.net/weixin_29331689/article/details/113569151