iphone-common-codes-ccteam源代码 CCIOS.m-优快云博客

本文介绍如何使用Objective-C代码获取iOS设备的操作系统版本、主版本号和子版本号，包括多任务支持情况。

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//
//  CCIOS.m
//  CCFC
//
//  Created by xichen on 11-12-17.
//  Copyright 2011年 ccteam. All rights reserved.
//


#import "CCIOS.h"
#import "CCNSString.h"
#import "CCUIDevice.h"


@implementation CCIOS


//获取OS版本
+ (NSString *)osVersion 
{
        return [[UIDevice currentDevice] systemVersion];
}


// 获取OS主版本号
+ (NSString *)osMajorVer
{
        NSString *osVer = [self osVersion];
    if(osVer == nil)
        return nil;
    
        NSInteger index = [osVer firstIndexOfChar:'.'];
        if(index < 0)
        {
                return osVer;
        }
        else if(0 == index)
        {
                return @"";
        }
        else
        {
                return [osVer substringToIndex:index];
        }
}


// 获取OS子版本号
+ (NSString *)osMinorVer
{
        NSString *osVer = [self osVersion];
        
        NSInteger firstIndex = [osVer firstIndexOfChar:'.'];
        NSInteger lastIndex = [osVer firstIndexOfChar:'.' withAppearCount:2];
        if(firstIndex < 0)
        {
                return @"";
        }
        else if(lastIndex < 0)
        {
                if(firstIndex == osVer.length - 1)
                {
                        return @"";
                }
                return [osVer substringWithRange:NSMakeRange(firstIndex + 1, osVer.length - firstIndex - 1)];
        }
        else
        {
                return [osVer substringWithRange:NSMakeRange(firstIndex + 1, lastIndex - firstIndex - 1)];
        }
}


// whether the device supports multitask
+ (BOOL)isSupportsMultitask __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_4_0)
{
        return [UIDevice isSupportsMultitask];
}


@end

googlecode链接地址（会有更新）：http://code.google.com/p/iphone-common-codes-ccteam/source/browse/trunk/CCFC/files/CCIOS.m

github地址：https://github.com/cxsjabc/iphone-common-codes-ccteam/tree/master/CCFC/files/CCIOS.m