获取iOS系统的相关信息

获取系统的iOS版本

#import "sys/utsname.h"   //这个加不加都没影响

[[[UIDevice currentDevice] systemVersion] floatValue]；

6.0以下获取系统的唯一标识uuid（为了系统安全考虑，6.0以后此方法被DEPRECATED）

[[UIDevice currentDevice] uniqueIdentifier]; //真实的uuid

6.0及其以上获取系统唯一标识（这个不是物理uuid，只是名字叫UUID而已，）

,[[[UIDevice currentDevice] identifierForVendor] UUIDString];

综上：

    NSLog(@"%f",[[[UIDevice currentDevice] systemVersion] floatValue]);
    if ([[[UIDevice currentDevice] systemVersion] floatValue]<6.0) {
        NSLog(@"%@",[[UIDevice currentDevice] uniqueIdentifier]); //真实uuid
    }else //6.0及其以上
    {
        NSLog(@"6.0 %@",[[[UIDevice currentDevice] identifierForVendor] UUIDString]);
    }

此外，UIDevice类还有如下属性：

+ (UIDevice *)currentDevice;

@property(nonatomic,readonly,retain) NSString    *name;              // e.g. "My iPhone"
@property(nonatomic,readonly,retain) NSString    *model;             // e.g. @"iPhone", @"iPod touch"
@property(nonatomic,readonly,retain) NSString    *localizedModel;    // localized version of model
@property(nonatomic,readonly,retain) NSString    *systemName;        // e.g. @"iOS"
@property(nonatomic,readonly,retain) NSString    *systemVersion;     // e.g. @"4.0"
@property(nonatomic,readonly) UIDeviceOrientation orientation;       // return current device orientation.  this will return UIDeviceOrientationUnknown unless device orientation notifications are being generated.
@property(nonatomic,readonly,retain) NSString    *uniqueIdentifier  NS_DEPRECATED_IOS(2_0, 5_0);  // a string unique to each device based on various hardware info.

@property(nonatomic,readonly,retain) NSUUID      *identifierForVendor NS_AVAILABLE_IOS(6_0);      // a UUID that may be used to uniquely identify the device, same across apps from a single vendor.

@property(nonatomic,readonly,getter=isGeneratingDeviceOrientationNotifications) BOOL generatesDeviceOrientationNotifications;
- (void)beginGeneratingDeviceOrientationNotifications;      // nestable
- (void)endGeneratingDeviceOrientationNotifications;

@property(nonatomic,getter=isBatteryMonitoringEnabled) BOOL batteryMonitoringEnabled NS_AVAILABLE_IOS(3_0);  // default is NO
@property(nonatomic,readonly) UIDeviceBatteryState          batteryState NS_AVAILABLE_IOS(3_0);  // UIDeviceBatteryStateUnknown if monitoring disabled
@property(nonatomic,readonly) float                         batteryLevel NS_AVAILABLE_IOS(3_0);  // 0 .. 1.0. -1.0 if UIDeviceBatteryStateUnknown

@property(nonatomic,getter=isProximityMonitoringEnabled) BOOL proximityMonitoringEnabled NS_AVAILABLE_IOS(3_0); // default is NO
@property(nonatomic,readonly)                            BOOL proximityState NS_AVAILABLE_IOS(3_0);  // always returns NO if no proximity detector

@property(nonatomic,readonly,getter=isMultitaskingSupported) BOOL multitaskingSupported NS_AVAILABLE_IOS(4_0);

@property(nonatomic,readonly) UIUserInterfaceIdiom userInterfaceIdiom NS_AVAILABLE_IOS(3_2);

- (void)playInputClick NS_AVAILABLE_IOS(4_2);  // Plays a click only if an enabling input view is on-screen and user has enabled input clicks.