[SalesForce] Unable to display icon in the lightning component

for accessing standard lightning SLDS resource image i am using below tag in visualforce page and i can able to see the image.

<img src="{!$Asset.SLDS}/assets/icons/utility/chevrondown_60.png" />

for accessing standard lightning SLDS resource image in the Lightning component i am using below tag but i can't able to see the image.

<img src="{!$Asset.SLDS+'/assets/icons/utility/chevrondown_60.png'}" />

if anybody knows the how to access the image in the Lightning component help me (Spring 17).

Best Answer

If you want to use icons from SLDS in Lightning Component, you should use the lightning:icon Base Component:

<lightning:icon iconName="utility:chevrondown" size="small"/>

You can then use attributes like size or variant to display the icon in the size and color you want.