标签：blog io os ar 使用 for sp div on
对于是否为首次安装的App可以使用如下方法来判断
[[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"];
如果App是通过App Store升级的话可以通过版本号来判断
[[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"];
实际使用可以在didFinishLaunchingWithOptions:中添加如下代码
if(![[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"]) {
[[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstLaunch"];
NSLog(@"安装之后首次开启App");
//获取当前App版本号并存入NSUserDefaults中
NSString* appVersion = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"];
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults setObject:appVersion forKey:@"appVersion"];
[userDefaults synchronize];
}
else {
//根据版本号判断是否更新后首次启动
NSString* appVersion = [[[NSBundle mainBundle] infoDictionary] objectForKey:@"CFBundleVersion"];
NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
NSString* localVersion = [userDefaults stringForKey:@"appVersion"];
if ([appVersion isEqualToString:localVersion]) {
NSLog(@"安装或升级之后并非首次开启App");
}
else {
NSLog(@"升级之后首次开启App");
//将当前App版本号存入NSUserDefaults中
[userDefaults setObject:appVersion forKey:@"appVersion"];
[userDefaults synchronize];
}
}
标签：blog io os ar 使用 for sp div on
原文地址：http://www.cnblogs.com/dinotang/p/4060208.html
