block 滑块导航条 关联

@property(nonatomic,retain)UIView *block;

-(void)btnClicked:(UIButton *)sender

{

__block CGRect targetFrame = self.block.frame;

BOOLdirectionRight=targetFrame.origin.x<sender.frame.origin.x;

targetFrame.origin.x=sender.frame.origin.x+(directionRight?30:-30);

[UIView animateWithDuration:0.1 animations:^{

self.block.frame=targetFrame;

}completion:^(BOOL finished){

targetFrame.origin.x+=directionRight?-50:50;

[UIView animateWithDuration:0.1 animations:^{

self.block.frame=targetFrame;

}completion:^(BOOL finished){

targetFrame.origin.x+=directionRight?20:-20;

[UIView animateWithDuration:0.1 animations:^{

self.block.frame=targetFrame;

}];

}];

}];

}

-(void)buildLayout{

NSArray *arrbtn=@[@"主菜单",@"收藏",@"最近使用",@"更多。。。",];

self.view.backgroundColor=[UIColor colorWithRed:241/255.0fgreen:200/255.0f blue:55/255.0f alpha:1.0f];

for (int i=0; i<5; i++) {

UIButton *btn=[UIButtonbuttonWithType:UIButtonTypeRoundedRect];

//[btn setTitle:[NSString stringWithFormat:@"btn%d",i]forState:UIControlStateNormal];

btn.frame=CGRectMake(64*i,CGRectGetHeight(self.view.bounds)-40, 64, 40);

[btn setTitle:[arrbtn objectAtIndex:i] forState:UIControlStateNormal];

btn.layer.backgroundColor=[UIColor clearColor].CGColor;

btn.layer.borderWidth=1.0f;

[btn addTarget:self action:@selector(btnClicked:)forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:btn];

}

UIView *blockBg=[[UIView alloc]initWithFrame:CGRectMake(0,CGRectGetHeight(self.view.bounds)-60, 320, 20)];

blockBg.backgroundColor=[UIColor clearColor];

[self.view addSubview:blockBg];

UIView *bgLayer=[[UIView alloc]initWithFrame:blockBg.frame];

bgLayer.backgroundColor=[UIColor clearColor];

bgLayer.layer.opacity=0.4f;

[blockBg addSubview:bgLayer];

self.block=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 64,20)];

self.block.backgroundColor=[UIColor orangeColor];

self.block.layer.opacity=1.0f;

[blockBg addSubview:self.block];

}