Help!iOS problem,"Connection to assetsd was interrupted or assetsd died"

Use ofxiOSImagePicker,if the photo is big(e.g. 2M),it always gets this error “Connection to assetsd was interrupted or assetsd died”,and then memory warning,if use imagepicker again,it will crash.(shut down by ios system)

Any one has ideas about this?for big photos pick and use as ofimage?