获取应用版本号

NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];
// app名称 
NSString *app_Name = [infoDictionary objectForKey:@"CFBundleDisplayName"]; 
 
// app版本 
NSString *app_Version = [infoDictionary objectForKey:@"CFBundleShortVersionString"]; 
 
// app build版本 
NSString *app_build = [infoDictionary objectForKey:@"CFBundleVersion"];