iOS development--Adding simple animation effects

Record a simple animation effect, write it yourself, very simple, just do the recording.

Attached to a demo:

Https://github.com/hgl753951/hglTest.git

The code is as follows:

1, prepare

BOOL _isopen;     * _btnarray;

2, specific code

-(void) initui{_btnarray=[[Nsmutablearray alloc]init];  for(intI=0; i<4; i++) {UIButton* BTN =[UIButton Buttonwithtype:uibuttontypecustom]; Btn.tag=i; Btn.frame= CGRectMake (260,420, +, +); [Btn setbackgroundimage:[uiimage imagenamed:[nsstring stringWithFormat:@"c_setting%d", (i+1)%4] ] [forstate:uicontrolstatenormal];        [Btn addtarget:self Action: @selector (Btnclick:) forcontrolevents:uicontroleventtouchupinside];        [Self.view ADDSUBVIEW:BTN];            [_btnarray ADDOBJECT:BTN]; }}-(void) Btnclick: (UIButton *) btn{//if it is not open    if(!_isopen) {        //Open Nine grid         for(inti =0; i < _btnarray.count; i++) {UIButton* Mybtn =[_btnarray objectatindex:i]; [UIView animatewithduration:0.3Animations:^{mybtn.frame= CGRectMake ( the+ (i%2)* -, -+ -* (i/2), +, +); } Completion:^(BOOL finished) {[UIView animatewithduration:0.3Animations:^{mybtn.frame= CGRectMake ( $+ (i%2)* -, the+ (i/2)* -, +, +);                             }];        }]; }            }    Else    {        //Close Nine grid         for(inti =0; i < _btnarray.count; i++) {UIButton* Mybtn =[_btnarray objectatindex:i]; [UIView animatewithduration:0.3Animations:^{mybtn.frame= CGRectMake ( the+ (i%2)* -, -+ -* (i/2), +, +); } Completion:^(BOOL finished) {[UIView animatewithduration:0.3Animations:^{mybtn.frame= CGRectMake (260,420, +, +);                             }];        }]; }} _isopen= !_isopen;}

The effect is as follows:

iOS development--Adding simple animation effects