為工程的底部工具欄新增乙個簡單而小萌的動畫，原理是在
uitabbarcontroller
的裡面切換item時的方法中新增乙個縮放動畫。
實現的效果如下gif圖，
**如下，
//tabbar選中item
- (void
)tabbar:(
uitabbar
*)tabbar didselectitem:(
uitabbaritem
*)item
#pragma mark - tabbar item
選中時的動畫
- (void
)animationwithindex:(
nsinteger
) index
}cabasicanimation
* animation = [
cabasicanimation
animationwithkeypath
:@"transform.scale"
];animation.
timingfunction
= [camediatimingfunction
functionwithname
:kcamediatimingfunctioneaseineaseout
];animation.
duration
=0.1
;animation.
repeatcount=1
;animation.
autoreverses
=yes
;animation.
fromvalue
;animation.
tovalue
;[[tabbarbuttonarray[index]
layer
]addanimation
:animation
forkey
:nil];}
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