-(NSString*)deviceVersion
    {
        // 需要#import "sys/utsname.h"
        struct utsname systemInfo;
        uname(&systemInfo);
        NSString * deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
        YTLog(@"%@",deviceString);
        NSString * phoneType = [NSString stringWithCString: systemInfo.machine encoding:NSASCIIStringEncoding];
        YTLog(@"%@",phoneType);
        //iPhone
        if ([deviceString isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
        if ([deviceString isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
        if ([deviceString isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
        if ([deviceString isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
        if ([deviceString isEqualToString:@"iPhone3,2"])    return @"Verizon iPhone 4";
        if ([deviceString isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";
        if ([deviceString isEqualToString:@"iPhone5,1"])    return @"iPhone 5";
        if ([deviceString isEqualToString:@"iPhone5,2"])    return @"iPhone 5";
        if ([deviceString isEqualToString:@"iPhone5,3"])    return @"iPhone 5C";
        if ([deviceString isEqualToString:@"iPhone5,4"])    return @"iPhone 5C";
        if ([deviceString isEqualToString:@"iPhone6,1"])    return @"iPhone 5S";
        if ([deviceString isEqualToString:@"iPhone6,2"])    return @"iPhone 5S";
        if ([deviceString isEqualToString:@"iPhone7,1"])    return @"iPhone 6 Plus";
        if ([deviceString isEqualToString:@"iPhone7,2"])    return @"iPhone 6";
        if ([deviceString isEqualToString:@"iPhone8,1"])    return @"iPhone 6s";
        if ([deviceString isEqualToString:@"iPhone8,2"])    return @"iPhone 6s Plus";
        if ([deviceString isEqualToString:@"iPhone8,4"])    return @"iPhone SE";
        if ([deviceString isEqualToString:@"iPhone9,1"])    return @"iPhone 7";
        if ([deviceString isEqualToString:@"iPhone9,2"])    return @"iPhone 7 Plus";
        if ([deviceString isEqualToString:@"iPhone10,1"])   return @"iPhone 8";
        if ([deviceString isEqualToString:@"iPhone10,4"])   return @"iPhone 8";
        if ([deviceString isEqualToString:@"iPhone10,2"])   return @"iPhone 8 Plus";
        if ([deviceString isEqualToString:@"iPhone10,5"])   return @"iPhone 8 Plus";
        if ([deviceString isEqualToString:@"iPhone10,3"])   return @"iPhone X";
        if ([deviceString isEqualToString:@"iPhone10,6"])   return @"iPhone X";
        if ([deviceString isEqualToString:@"iPhone11,8"])   return @"iPhone XR";
        if ([deviceString isEqualToString:@"iPhone11,2"])   return @"iPhone XS";
        if ([deviceString isEqualToString:@"iPhone11,4"])   return @"iPhone XS Max";
        if ([deviceString isEqualToString:@"iPhone11,6"])   return @"iPhone XS Max";
        if ([deviceString isEqualToString:@"iPhone12,1"])   return @"iPhone 11";
        if ([deviceString isEqualToString:@"iPhone12,3"])   return @"iPhone 11 Pro";
        if ([deviceString isEqualToString:@"iPhone12,5"])   return @"iPhone 11 Pro Max";
        return deviceString; 
    }