1：獲取bundle Id信息：[[NSBundle mainBundle]bundleIdentifier]；
2：獲取版本號：
[[[NSBundle?mainBundle]infoDictionary]?objectForKey:@"CFBundleShortVersionString"];
3：獲取build號：
[[[NSBundle?mainBundle]infoDictionary]?objectForKey:@"CFBundleVersion"];
4：獲取App顯示名：
[[[NSBundle?mainBundle]infoDictionary]?objectForKey:@"CFBundleDisplayName"];
其實 [[NSBundle?mainBundle]infoDictionary] 獲得的是一個字典，里邊放著Info.plist文件中的各種信息，根據不同的鍵去即可，如：
CFBundleDevelopmentRegion
CFBundleDisplayName
CFBundleExecutable
CFBundleExecutablePath
CFBundleIdentifier
CFBundleInfoDictionaryVersion = "6.0";
CFBundleInfoPlistURL
CFBundleName
CFBundlePackageType
CFBundleShortVersionString
CFBundleSignature
CFBundleSupportedPlatforms
