iOS实现背景滑动效果

#import <UIKit/UIKit.h>  
  
@interface ViewController : UIViewController{  
    NSMutableArray *btnArray;  
    NSMutableArray *titleArray;  
}  
  
@property (nonatomic,strong) UIView *customView;  
@property (nonatomic,strong) UIView *backView;  
@property (nonatomic,strong) UIButton *myButton;  
  
-(void)myButtonClcik:(id)sender;  
  
@end  

#import "ViewController.h"  
#import <QuartzCore/QuartzCore.h>  
  
@interface ViewController ()  
  
@end  
  
@implementation ViewController  
  
@synthesize customView;  
@synthesize backView;  
@synthesize myButton;  
  
//每行显示的button个数  
#define kSelectNum 6  
  
- (void)viewDidLoad  
{  
    [super viewDidLoad];  
    // Do any additional setup after loading the view, typically from a nib.  
      
    //创建背景视图，并设置背景颜色或者图片  
    customView = [[UIView alloc]initWithFrame:CGRectMake(20, 100, 900, 60)];  
    customView.backgroundColor = [UIColor blackColor];  
    //设置customView的样式，变为圆角  
    customView.layer.cornerRadius = 15.0f;  
    customView.layer.masksToBounds = YES;  
    //将customView add 到当前主View中  
    [self.view addSubview:customView];  
      
    //创建button的背景视图  
    backView = [[UIView alloc] initWithFrame:CGRectMake(5, 5, 95, 50)];  
    backView.backgroundColor = [UIColor blueColor];  
    //设置为圆角。以免造成重叠显示  
    backView.layer.cornerRadius = 15.0f;  
    backView.layer.masksToBounds = YES;  
    //将backView视图add到customView中  
    [customView addSubview:backView];  
      
      
    //创建button，首先button的个数是不固定的，因此我们需要动态的生成button  
    //创建数组，保存button的title  
    btnArray = [[NSMutableArray alloc]init];  
    titleArray = [[NSMutableArray alloc]initWithObjects:@"热播大片",@"最新更新",@"最热观看",@"美剧大片",@"韩剧频道",@"综艺娱乐", nil];  
    //动态生成button  
    for (int i = 0; i < kSelectNum; i ++){  
        myButton = [UIButton buttonWithType:UIButtonTypeCustom];  
        myButton.titleLabel.font = [UIFont boldSystemFontOfSize:20.0f];  
        [myButton setTitle:[titleArray objectAtIndex:i] forState:UIControlStateNORMal];  
        [myButton setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];  
        [myButton setTitleColor:[UIColor whiteColor] forState:UIControlStateSelected];  
        [myButton setFrame:CGRectMake(i%(kSelectNum + 1)*140+5, 5, 95, 50)];  
        [myButton addTarget:self action:@selector(myButtonClcik:) forControlEvents:UIControlEventTouchUpInside];  
        myButton.tag = i;  
        [btnArray addObject:myButton];  
        [customView addSubview:myButton];  
          
        //设置默认选择的button.title的颜色  
        if(i == 0){  
            myButton.selected = YES;  
        }  
    }  
}  

- (void)myButtonClcik:(id)sender{  
//    NSString *selectedBtn = [NSString stringWithFormat:@"%@",[titleArray objectAtIndex:button.tag]];  
//    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nil message:selectedBtn delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];  
//    [alert show];  
      
    //添加动画过度效果  
    [UIView beginAnimations:@"slowGlide" context:nil];  
    [UIView setAnimationDuration:0.3f];  
      
    //设置每次只能选择一个button  
    UIButton *button = (UIButton *)sender;  
    if(!button.selected){  
        for (UIButton *eachBtn in btnArray) {  
            if(eachBtn.isSelected){  
                [eachBtn setSelected:NO];  
            }  
        }  
        [button setSelected:YES];  
          
        //设置点击那个按钮，那个按钮的背景改变为backView的颜色  
        [backView setFrame:button.frame];  
    }  
    [UIView commitAnimations];  
}