iOS 读取app版本号和编译时间

	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"];
	//app编译日期
	NSString *buildDate = [NSString stringWithFormat:@"%s %s",__DATE__, __TIME__];