Fix long press behavior in iOS.
Fix long press behavior in iOS.

randyeasy/SECoreTextView,yingzhuo1314/SECoreTextView,kishikawakatsumi/SECoreTextView,HarrisLee/SECoreTextView,ywzw2013/SECoreTextView,xiaonan0527/SECoreTextView,qskycolor/SECoreTextView