UIDevice相关

判断是否是横向屏：

BOOL b=UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation);

获取设备信息

[[UIDevice currentDevice] systemName];
[[UIDevice currentDevice] systemVersion];//os version
[[UIDevice currentDevice] uniqueIdentifier];//在ios5中，它已被废弃
[[UIDevice currentDevice] model];
[[UIDevice currentDevice] name];

真机上结果：

System Name: iPhone OS

System Version: 4.2.1

Unique ID: 9b5ded78d5fa0ac96250f8b4af0e46f40b96ea6d

Model: iPhone

Name: “wwk”的 iPhone

模拟器上结果：

System Name: iPhone OS

System Version: 4.2

Unique ID: 21FFE0FF-429B-5D0B-96D2-EADCA3203260

Model: iPhone Simulator

Name: iPhone Simulator

uniqueIdentifier：iPhone通过，向几个硬件标识符和设备序列号应用内部散列算法，而生成这一标识符。

2.电池事件通知及电池状态：电池水平是一个浮点值，从0.0完全放电，到1.0完全充满。

[NSLog:@"Battery level: %0.2f%", [[UIDevice currentDevice] batteryLevel] * 100];

NSArray *stateArray = [NSArray arrayWithObjects: @"Unknown", @"not plugged into a charging source", @"charging", @"full", nil];
[NSLog:@"Battery state: %@", [stateArray objectAtIndex:[[UIDevice currentDevice] batteryState]]];

3.传感器。

启用接近传感器后，它检测前方是否存在一个大型物体，如果有，它会关闭屏幕，并发出一般性通知。当障碍物移走后，会重新打开屏幕。这可以防止在通知过程中，误用耳朵触碰按钮。

还要防止一些保护套会影响传感器工作。

[UIDevice currentDevice].proximityMonitoringEnabled=YES;

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleStateChange:) name:@"UIDeviceProximityStateDidChangeNotification" object:nil];

4.加速度。

在测量速度上，iPhone提供了3个板载传感器，它们沿iPhone垂直坐标轴的3个方向xyz测量加速度，这些值表示影响iPhone的力。

[[UIAccelerometer sharedAccelerometer] setDelegate:self];//UIAccelerometerDelegate

 - (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration
{
  float xx = -[acceleration x];
  float yy = [acceleration y];
  float angle = atan2(yy, xx);
  [arrow setTransform:CGAffineTransformMakeRotation(angle)];
}

5.检测设备方向：横线或纵向。

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications]; // not actually required but a good idea in case Apple changes this
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:nil];

//在viewController中重写shouldAutorotateToInterfaceOrientation
- (BOOL) shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation) anOrientation
{
    return (anOrientation == UIDeviceOrientationPortrait || 
    anOrientation == UIDeviceOrientationLandscapeRight ||
    anOrientation == UIDeviceOrientationLandscapeLeft ||);

    //iPhone不建议使用UIDeviceOrientationPortraitUpsizeDown
}

- (void) orientationChanged: (id) sender
{
    NSLog(@"Orientation changed to %@", [UIDevice currentDevice].orientationString);//当前设备方向
}

两个内置的宏辅助判断方向

UIDeviceOrientationIsPortrait(anOrientation) 
UIDeviceOrientationIsLandscape(anOrientation)

6.摇晃检测 ShakeDetection。

响应链：响应链提供了层级对象，一个事件若被起始处的对象接收，它不会再被向下传递；否则，继续向下传递。

对象通常是通过[self becomeFirstResponder];声明自身为第一响应者。[self resignFirstResponder];声明退出第一响应者。第一响应者接收所有运动和触摸事件。

- (BOOL)canBecomeFirstResponder {return YES;}

有如下3个运动回调函数可以被覆盖，它们定义在UIResponder中：

- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event 
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event 
- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event

7.磁盘空间

NSFileManager *fm = [NSFileManager defaultManager];
NSDictionary *fattributes = [fm fileSystemAttributesAtPath:NSHomeDirectory()];
System space:[[fattributes objectForKey:NSFileSystemSize] longLongValue];
System free space: [[fattributes objectForKey:NSFileSystemFreeSize] longLongValue];

8.iTunes通过在info.plist中列出的设备功能列表，确定一个程序是否可以下载到指定设备中并正常运行。

9.在AVAILABILITY.h文件中有版本宏定义，例如：__IPHONE_4_2

这个是os version还是sdk version，或者它们是相同的？

http://www.opensource.apple.com/source/CarbonHeaders/CarbonHeaders-18.1/Availability.h

10.

NSString* udid=[[UIDevice currentDevice] uniqueIdentifier];
    return udid;
//改为在最上层使用了一层button来响应点击事件
 /*
 else
 {
    NSString* systemVersion=[[UIDevice currentDevice] systemVersion];
    float floatVersion=[systemVersion floatValue];
    NSLog(@"systemVersion:%@,floatVersion:%f",systemVersion,floatVersion);
    if(floatVersion<5.0)
    {
       //in ios5，每层UIView均会响应touchesEnded，所以ios5不用这里向上调了。
       ret=[(ViewGroupWrap*)iSuperViewWrap handleTouch];
    }
 }
 */

11.coding区分iphone ipod & ipad 的几种方法

• 使用 UI_USER_INTERFACE_IDIOM() 进行区分 ,

UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad    //ipad
UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone    //iPhone

• 使用 UIDevice.model 进行区分

NSString *deviceType = [UIDevice currentDevice].model;

if([deviceType isEqualToString:@"iPhone"]) {
    //iPhone
}
else if([deviceType isEqualToString:@"iPod touch"]) {
    //iPod Touch
}
else {
    //iPad
}

• 使用系统的一个函数sysctlbyname 来获取设备名称

- (NSString *) platformString
{
    size_t size;
    sysctlbyname("hw.machine", NULL, &size, NULL, 0);
    char *machine = malloc(size);
    sysctlbyname("hw.machine", machine, &size, NULL, 0);
    NSString *platform = [NSString stringWithUTF8String:machine];
    free(machine);
    if ([platform isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
    if ([platform isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
    if ([platform isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
    if ([platform isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
    if ([platform isEqualToString:@"iPhone3,3"])    return @"Verizon iPhone 4";
    if ([platform isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
    if ([platform isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
    if ([platform isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
    if ([platform isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
    if ([platform isEqualToString:@"iPad1,1"])      return @"iPad";
    if ([platform isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
    if ([platform isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
    if ([platform isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
    if ([platform isEqualToString:@"i386"])         return @"Simulator";
    return @"";
}

参考 http://hi.baidu.com/songxiaoweiss/blog/item/c78162f869fc148c58ee9028.html

12.关于获取IMSI号

 CoreTelephony.framework，

 头文件内容

 extern NSString* c*****t kCTSMSMessageReceivedNotification;

extern NSString* c*****t kCTSMSMessageReplaceReceivedNotification;
extern NSString* c*****t kCTSIMSupportSIMStatusNotInserted;
extern NSString* c*****t kCTSIMSupportSIMStatusReady; 
id CTTelephonyCenterGetDefault(void);
void CTTelephonyCenterAddObserver(id,id,CFNotificationCallback,NSString*,void*,int);
void CTTelephonyCenterRemoveObserver(id,id,NSString*,void*);
int CTSMSMessageGetUnreadCount(void); 
int CTSMSMessageGetRecordIdentifier(void * msg);
NSString * CTSIMSupportGetSIMStatus();   //获取sim卡状态，kCTSIMSupportSIMStatusNotInserted表示没有sim卡
NSString * CTSIMSupportCopyMobileSubscriberIdentity();  //获取imsi号码
id  CTSMSMessageCreate(void* unknow/*always 0*/,NSString* number,NSString* text);
void * CTSMSMessageCreateReply(void* unknow/*always 0*/,void * forwardTo,NSString* text); 
void* CTSMSMessageSend(id server,id msg); 
NSString *CTSMSMessageCopyAddress(void *, void *);
NSString *CTSMSMessageCopyText(void *, void *);

调用CTSIMSupportCopyMobileSubscriberIdentity能成功获取到IMSI号

用performSelector来逃过苹果的检查