UIView*backscrollview=[[UIView alloc]init];
backscrollview.frame=CGRectMake(10, 13, 100, 18);
backscrollview.backgroundColor=[UIColor clearColor];
//需要给标签设置一个父控件,并将溢出的部分屏蔽掉
backscrollview.clipsToBounds=YES;
[self.navigationController.navigationBar addSubview:backscrollview];
//导航左侧文本
UILabel*lblScrollLabel=[[UILabel alloc]init];
lblScrollLabel.text=@"我依然燃烧我仍在信仰";
lblScrollLabel.font = [UIFont systemFontOfSize:15];
CGSize lblSize= [HemaFunction getSizeWithStr:lblScrollLabel.text width:150 font:15];
if (lblSize.width>self.frame.size.width)
{
lblSize.width=self.frame.size.width;
}
lblScrollLabel.frame = CGRectMake(0, 0, lblSize.width, self.frame.size.height);
lblScrollLabel.backgroundColor = [UIColor clearColor];
lblScrollLabel.textColor = BB_Blake_Color;
lblScrollLabel.textAlignment = NSTextAlignmentLeft;
lblScrollLabel.frame = CGRectMake(0, (self.frame.size.height-lblSize.height)/2, lblSize.width, self.frame.size.height);
//实现标签滚动的动画
CGRect frame = lblScrollLabel.frame;
frame.origin.x = lblSize.width;
lblScrollLabel.frame = frame;
//这个属性是让标签内容自动展示在父控件中和多行展示属性有冲突
[lblScrollLabel sizeToFit];
[UIView beginAnimations:@"testAnimation" context:NULL];
[UIView setAnimationDuration:5];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];
[UIView setAnimationDelegate:self];
[UIView setAnimationRepeatAutoreverses:NO];
[UIView setAnimationRepeatCount:9999999999999];
frame = lblScrollLabel.frame;
frame.origin.x = -titlewidth;
lblScrollLabel.frame = frame;
[UIView commitAnimations];
[self addSubview:lblScrollLabel];