ios开发过程中 设备类型的判断 系统版本号的判断

简单地判断运行的设备的类型

/**
*  判断是否是iphone
*
*  @return YES 是
*/
+ (BOOL)isIphone
{
NSString* deviceType = [UIDevice currentDevice].model;
return [deviceType rangeOfString:@"iPhone"].length > 0;
}
/**
*  判断是否是ipod
*
*  @return YES 是
*/
+ (BOOL)isIpod
{
NSString* deviceType = [UIDevice currentDevice].model;
return [deviceType rangeOfString:@"iPod"].length > 0;
}

当然上边的只是简单的判断 更详细的判断可以用下边的方法，可以判断详细的设备信息，当然我的信息可能不是很全，每年都会新增很多不同的版本具体的可以自己扩展

//手机型号（这跟系统获取的不一样，这是获取iPhone5，4，6之类的）要导入

- (NSString*)deviceString
{
// 可能需要更新
// 需要#import "sys/utsname.h"
struct utsname systemInfo;
uname(&systemInfo);
NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
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:@"iPhone4,1"])    return @"iPhone 4S";
if ([deviceString isEqualToString:@"iPhone5,2"])    return @"iPhone 5";
if ([deviceString isEqualToString:@"iPhone3,2"])    return @"Verizon iPhone 4";
if ([deviceString isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
if ([deviceString isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
if ([deviceString isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
if ([deviceString isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
if ([deviceString isEqualToString:@"iPad1,1"])      return @"iPad";
if ([deviceString isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
if ([deviceString isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
if ([deviceString isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
if ([deviceString isEqualToString:@"i386"])         return @"Simulator";
if ([deviceString isEqualToString:@"x86_64"])       return @"Simulator";
NSLog(@"NOTE: Unknown device type: %@", deviceString);
return deviceString;
}

判断设备的版本号

/**
*  判断是否是ios8
*
*  @return YES 是
*/
+ (BOOL)isIos8
{
return [[UIDevice currentDevice].systemVersion floatValue] >= 8.0;
}

虽然上边可以把相应地方法写成类方法，方便大家快速地调用，但是还是没有抽成宏的方便

#define iPhone ([[UIDevice currentDevice].model rangeOfString:@"iPhone"].length > 0)
#define iPod  ([[UIDevice currentDevice].model rangeOfString:@"iPod"].length > 0)
#define ios8 ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0)

这样的话就更加的方便了