iOS开发app自动更新的实现

#define kStoreAppId @“xxxxxxxxx” // （appid数字串）

-(void)checkAppUpdate {

NSDictionary *infoDict = [[NSBundle mainBundle] infoDictionary];

NSString *nowVersion = [infoDict objectForKey:@"CFBundleVersion"];

NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?id=%@", kStoreAppId]];

NSString * file = [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];

NSRange substr = [file rangeOfString:@"\"version\":\""]; NSRange range1 = NSMakeRange(substr.location+substr.length,10);

NSRange substr2 =[file rangeOfString:@"\"" options:nil range:range1]; NSRange range2 = NSMakeRange(substr.location+substr.length, substr2.location-substr.location-substr.length);

NSString *newVersion =[file substringWithRange:range2];

if(![nowVersion isEqualToString:newVersion]) {

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"版本有更新"delegate:self cancelButtonTitle:@"取消"otherButtonTitles:@"更新",nil]; [alert show];

}

}

- (void)alertView:(UIAlertView*)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

{

if(buttonIndex==1)

{ // 此处加入应用在app store的地址，方便用户去更新，一种实现方式如下：

NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"https://itunes.apple.com/us/app/id%@?ls=1&mt=8", kStoreAppId]];

[[UIApplication sharedApplication] openURL:url]; } }