JSON value 'black' of type NSString cannot be converted to NSNumber

[tid:com.facebook.React.RNVectorIconsManagerQueue]
[RCTConvert.m:55] JSON value 'black' of type NSString cannot be converted to NSNumber

[ide]

Please provide more info... It's hard to tell what's going on here.

[dsibiski]

I'm running into this as well, iOS app on v0.12.0. Using black for a color in a StyleSheet.

[dsibiski]

Ah, look like we need to use processColor('black') to get this to work.

[Sh3rawi]

Im facing this problem when using the offline bundle only; when i react-native bundle the js code and try to run it on the device i get these errors:

2015-10-13 11:38:36.693 [error][tid:com.facebook.React.ShadowQueue][RCTConvert.m:55] Error setting property 'backgroundColor' of RCTView with tag 5: JSON value 'transparent' of type NSString cannot be converted to NSNumber
2015-10-13 11:38:36.767 [error][tid:com.facebook.React.ShadowQueue][RCTConvert.m:55] Error setting property 'backgroundColor' of RCTView with tag 7: JSON value '#F5FCFF' of type NSString cannot be converted to NSNumber
2015-10-13 11:38:36.928 [error][tid:com.facebook.React.ShadowQueue][RCTConvert.m:55] Error setting property 'color' of RCTText with tag 20: JSON value '#333333' of type NSString cannot be converted to NSNumber
2015-10-13 11:38:36.968 [error][tid:com.facebook.React.ShadowQueue][RCTConvert.m:55] Error setting property 'backgroundColor' of RCTView with tag 36: JSON value '#F009F8' of type NSString cannot be converted to NSNumber
2015-10-13 11:38:36.972 [error][tid:main][RCTConvert.m:55] Error setting property 'backgroundColor' of RCTView with tag 5: JSON value 'transparent' of type NSString cannot be converted to NSNumber
2015-10-13 11:38:37.065 [error][tid:main][RCTConvert.m:55] Error setting property 'backgroundColor' of RCTView with tag 7: JSON value '#F5FCFF' of type NSString cannot be converted to NSNumber
2015-10-13 11:38:37.109 [error][tid:main][RCTConvert.m:55] Error setting property 'borderColor' of RCTTextField with tag 25: JSON value '#0F0FFF' of type NSString cannot be converted to NSNumber
2015-10-13 11:38:37.139 [error][tid:main][RCTConvert.m:55] Error setting property 'borderColor' of RCTTextField with tag 28: JSON value '#0F0FFF' of type NSString cannot be converted to NSNumber
2015-10-13 11:38:37.165 [error][tid:main][RCTConvert.m:55] Error setting property 'backgroundColor' of RCTView with tag 36: JSON value '#F009F8' of type NSString cannot be converted to NSNumber

I tried using the procesColor in the stylesheet styles but this gives errors when running the js from the localhost. Or maybe im using them the wrong way ?

[Sh3rawi]

Nevermind. There was a confusion of where to get the main.jsbundle file; its created in /ios/ folder while its used in xcode in ios/project/.

[dsibiski]

I found the solution to my problem as well, the error was coming from an outdated 3rd party lib.

[javache]

If you're setting any colors using setNativeProps, you'll now need to pass them through processColor.

[kushal]

Is there any hope of improving the debugging situation error for these? I'm getting a totally cryptic stacktrace and am now poking around for instances of "black" anywhere in my code or libraries.

[sloanwolf]

I was getting this as well but noticed this error in xcode log:

[tid:com.facebook.React.RNVectorIconsManagerQueue][RCTConvert.m:55] JSON value 'black' of type NSString cannot be converted to NSNumber

Upgrading "react-native-vector-icons" to the latest 0.8.4 fixed it for me.

I received this after upgrading react-native to 0.13.2.