如何判断用户的设备是ipad还是iphone

在ios开发的过程中，有可能这里应用在iphone和ipad上都要使用，但是怎么判断当前设备是iphone还是ipad呢，在这里提供一种方法来判断这个设备是什么设备，具体代码如下
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NSString *nibTitle = @"PadContent"; //默认是ipad
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
{ //如果当前设备是iphone 就改为iphone的nib文件
nibTitle = @"PhoneContent";
}
[[NSBundle mainBundle] loadNibNamed:nibTitle owner:self options:nil];//加载nib

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
// Override point for customization after application launch.
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController_iPhone"bundle:nil] autorelease];
} else {
self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController_iPad"bundle:nil] autorelease];
}
self.window.rootViewController = self.viewController;
[self.window makeKeyAndVisible];
return YES;

可用于判断应用运行的设备是否是 iPad
#define isPad (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)

功能函数：
-(bool)checkDevice:(NSString*)name
{
NSString* deviceType = [UIDevice currentDevice].model;
NSLog(@"deviceType = %@", deviceType);

NSRange range = [deviceType rangeOfString:name];
return range.location != NSNotFound;
}

调用：
NSString * nsStrIphone=@"iPhone";
NSString * nsStrIpod=@"iPod";
NSString * nsStrIpad=@"iPad";
bool bIsiPhone=false;
bool bIsiPod=false;
bool bIsiPad=false;
bIsiPhone=[self checkDevice:nsStrIphone];
bIsiPod=[self checkDevice:nsStrIpod];
bIsiPad=[self checkDevice:nsStrIpad];