iOS代码技巧之判断设备及状态

转自：http://my.oschina.net/joanfen/blog/149076

一、判断设备

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//设备名称

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return [UIDevice currentDevice].name;

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//设备型号，只可得到是何设备，无法得到是第几代设备

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return [UIDevice currentDevice].model;

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//系统版本型号,如iPhone OS

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return [UIDevice currentDevice].systemVersion;

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//系统版本名称，如6.1.3

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return [UIDevice currentDevice].systemName;

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//判断是否为iPhone

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#define IS_IPHONE (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)

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//判断是否为iPad

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#define IS_IPAD (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

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//判断是否为ipod

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#define IS_IPOD ([[[UIDevice currentDevice] model] isEqualToString:@"iPod touch"])

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//判断是否为iPhone5

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#define IS_IPHONE_5_SCREEN [[UIScreen mainScreen] bounds].size.height >= 568.0f && [[UIScreen mainScreen] bounds].size.height < 1024.0f

二、判断网络连接状态

1、导入SystemConfiguration.framework,并#import<SystemConfiguration/SCNetworkReachability.h>

2、判断设备是否联网

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+ (BOOL)connectedToNetwork{

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    //创建零地址，0.0.0.0的地址表示查询本机的网络连接状态

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    struct sockaddr_storage zeroAddress;

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    bzero(&zeroAddress, sizeof(zeroAddress));

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    zeroAddress.ss_len = sizeof(zeroAddress);

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    zeroAddress.ss_family = AF_INET;

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    // Recover reachability flags

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    SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress);

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    SCNetworkReachabilityFlags flags;

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    //获得连接的标志

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    BOOL didRetrieveFlags = SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);

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    CFRelease(defaultRouteReachability);

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    //如果不能获取连接标志，则不能连接网络，直接返回

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    if (!didRetrieveFlags)

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    {

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        return NO;

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    }

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    //根据获得的连接标志进行判断

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    BOOL isReachable = flags & kSCNetworkFlagsReachable;

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    BOOL needsConnection = flags & kSCNetworkFlagsConnectionRequired;

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    return (isReachable&&!needsConnection) ? YES : NO;

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}