怎麼判斷ios 版本

-(void)getIOSVersion

{

// #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 50000    //此方法和編譯器相關

// quanju.iOSVersion=1;

// #endif 

float version = [[[UIDevice currentDevice] systemVersion] floatValue];  

if (version >= 5.0)  

{  

quanju.iOSVersion=1;//定義全域變數標記ios版本

}  

}

-(void)getIOSModel

{

CGSize sizeToRequest; 
if([[[UIDevicecurrentDevice] model] rangeOfString:@"iPad"].location== 0) 
sizeToRequest = CGSizeMake(748, 110); 
else 
sizeToRequest = CGSizeMake(320, 48); 

}

//下面是ios內其他相關資訊的判斷方法

擷取進程資訊和裝置資訊（包括裝置類型，序號，ios版本等） [[NSProcessInfo processInfo] globallyUniqueString], [[NSProcessInfo processInfo] hostName], [[NSProcessInfo processInfo] operatingSystemName], [[NSProcessInfo processInfo] operatingSystemVersionString], [[NSProcessInfo processInfo] physicalMemory], [[NSProcessInfo processInfo] processName]); —————————————————————————————— [UIDevice currentDevice].uniqueIdentifier, [UIDevice currentDevice].name, [UIDevice currentDevice].systemName, [UIDevice currentDevice].systemVersion, [UIDevice currentDevice].model, [UIDevice currentDevice].localizedModel, [UIDevice currentDevice].batteryLevel ___________________________________________________ NSLog([[UIDevice currentDevice] name]); // Name of the phone as named by user NSLog([[UIDevice currentDevice] uniqueIdentifier]); // A GUID like string NSLog([[UIDevice currentDevice] systemName]); // "iPhone OS" NSLog([[UIDevice currentDevice] systemVersion]); // "2.2.1" NSLog([[UIDevice currentDevice] model]); // "iPhone" on both devices NSLog([[UIDevice currentDevice] localizedModel]); // "iPhone" on both devices 轉自：http://blog.csdn.net/jinglijun/article/details/7292674