You can do this in two ways.
option -1
programmatically
Objective-c
label.lineBreakMode = NSLineBreakByTruncatingTail;
Swift
label.lineBreakMode =.byTruncatingTail
other types
typedef NS_ENUM(NSInteger, NSLineBreakMode) {
NSLineBreakByWordWrapping = 0,
NSLineBreakByCharWrapping,
NSLineBreakByClipping,
NSLineBreakByTruncatingHead,
NSLineBreakByTruncatingTail,
NSLineBreakByTruncatingMiddle
}
option -2
using the storyboard attribute inspector
