ios app强制更新（ios应用强制更新）

最近因项目需求，需要用到强制更新功能，网上搜了一下，挺多的，但是把网上的代码拷贝以后，发现一个bug，就是进app，弹出框显示，点击现在升级，跳转到appstore下载里面，但是我不下载，又切回到app里面，发现弹出框就不跳了，其实也简单，就是appdelegate里面有个代理方法，就是当app从后台切到前台走的方法，将强制更新方法在这里面在调用一下就行了~~~话不多说，上代码！！！用的话直接粘贴复制~

效果图:

在appdelegate里面写下面代码

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 //提示版本更新 [self versonupdate]; #pragma mark ------提示用户版本更新------ -(void)versonupdate{ //定义app地址 nsstring *urld = [nsstring stringwithformat:@"http://itunes.apple.com/lookup?id=%d",1178114725]; nsurl *url = [nsurl urlwithstring:urld]; nsmutableurlrequest *request = [nsmutableurlrequest requestwithurl:url cachepolicy:nsurlrequestreloadignoringcachedata timeoutinterval:10]; [request sethttpmethod:@"post"]; nsurlsession *session = [nsurlsession sharedsession]; nsurlsessiondatatask *task = [session datataskwithurl:url completionhandler:^(nsdata * _nullable data, nsurlresponse * _nullable response, nserror * _nullable error) { nslog(@"%@",response); nsmutabledictionary *receivestatusdic = [[nsmutabledictionary alloc]init]; if (data) { nsdictionary *receivedic = [nsjsonserialization jsonobjectwithdata:data options:nsjsonreadingmutableleaves error:nil]; if ([[receivedic valueforkey:@"resultcount"] intvalue] > 0) { [receivestatusdic setobject:@"1" forkey:@"status"]; [receivestatusdic setobject:[[[receivedic valueforkey:@"results"] objectatindex:0] valueforkey:@"version"] forkey:@"version"]; [self performselectoronmainthread:@selector(receivedata:) withobject:receivestatusdic waituntildone:no]; }else{ [receivestatusdic setvalue:@"1" forkey:@"status"]; } }else{ [receivestatusdic setvalue:@"-1" forkey:@"status"]; } }]; [task resume]; } -(void)receivedata:(id)sender { //获取app自身版本号 nsstring *localversion = [[[nsbundle mainbundle]infodictionary]objectforkey:@"cfbundleshortversionstring"]; nsarray *localarray = [localversion componentsseparatedbystring:@"."];//1.0 nsarray *versionarray = [sender[@"version"] componentsseparatedbystring:@"."];//3 2.1.1 // if ((versionarray.count == 2) && (localarray.count == versionarray.count)) { if ([localarray[0] intvalue] < [versionarray[0] intvalue]) { [self updateversion]; }else if ([localarray[0] intvalue] == [versionarray[0] intvalue]){ if ([localarray[1] intvalue] < [versionarray[1] intvalue]) { [self updateversion]; }else if ([localarray[1] intvalue] == [versionarray[1] intvalue]){ if ([localarray[2] intvalue] < [versionarray[2] intvalue]) { [self updateversion]; } } } // } } -(void)updateversion{ nsstring *msg = [nsstring stringwithformat:@"版本过低，需要升级到最新版本"]; uialertcontroller *alertcontroller = [uialertcontroller alertcontrollerwithtitle:@"升级提示" message:msg preferredstyle:uialertcontrollerstylealert]; uialertaction *otheraction = [uialertaction actionwithtitle:@"现在升级" style:uialertactionstyledestructive handler:^(uialertaction*action) { nsurl *url = [nsurl urlwithstring:[nsstring stringwithformat:@"https://itunes.apple.com/cn/app/m-help/id1178114725?mt=8"]]; [[uiapplication sharedapplication]openurl:url]; }]; [alertcontroller addaction:otheraction]; [self.window.rootviewcontroller presentviewcontroller:alertcontroller animated:yes completion:nil]; } //当app从后台切到前台时调用的方法 - (void)applicationdidbecomeactive:(uiapplication * )application { [self versonupdate]; }