IOS 实现背景滑动

1、在很多APP中，我们都可以看见那些特效绚丽的滑动选项条，那么如何才能够简单，快速的实现那样的效果呢


 

 

 

#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

第二步：在我们的额viewdidload方法中，或者自定义一个方法中创建我么的界面元素。《这里我引日了QuartzCore框架，是为了使用其layer属性》

 

 

#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;
        }
    }
}

第三步：我们为button添加按钮点击事件，同时设置背景色滑动特效。

 

 

- (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];
}

最后成型，我们就可以根据我们的样式需要进行调整了。