Label向上滾動(dòng) 播放系統(tǒng)消息
NSArray*arr =@[@"測(cè)試一",@"測(cè)試二",@"測(cè)試三",@"測(cè)試四",@"測(cè)試五",@"測(cè)試六",@"測(cè)試七"];
_count=0;
self.label.backgroundColor= [UIColorredColor];
[NSTimerscheduledTimerWithTimeInterval:1repeats:YESblock:^(NSTimer*_Nonnulltimer) {
CATransition*tran = [CATransitionanimation];
tran.type=kCATransitionPush;
tran.subtype=kCATransitionFromTop;
[self.label.layeraddAnimation:tranforKey:@"trans"];
self.label.text= arr[_count];
if(_count== arr.count-1) {
_count=0;
}else{
_count=_count+1;
}
}];
