今天给大家送点干货:封装的简单实用及介绍,希望大家共同学习共同进步
封装在变成过程中非常重要,可以提高代码的复用性,可以高效的完成项目,并且可以对外部提供接口
大家可以看一下 封装之前 和封装之后
viewDidLoad 中的代码量 ,未封装之前 基本上所有的代码都写在了控制器内,十分的麻烦
封装之后 有少量的代码就可以完成特定的功能!
封装之前:
// // QHMainController.m #import "QHMainController.h" #import "GPAdsView.h" @interface QHMainController ()<UIScrollViewDelegate> @property (weak, nonatomic) IBOutlet UIScrollView *scrollView; @property (weak, nonatomic) IBOutlet UIPageControl *pageControl; @property(nonatomic,strong) NSTimer *timer; @end @interface QHMainController()<GPAdsViewDelegate> @end @implementation QHMainController - (void)viewDidLoad { [super viewDidLoad]; int totalPage = 5; CGFloat btnW = self.scrollView.frame.size.width; CGFloat btnH = self.scrollView.frame.size.height; for (int i = 0; i < totalPage; i++) { UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; NSString *name = [NSString stringWithFormat:@"ad_%02d",i]; UIImage *image = [UIImage imageNamed:name]; [btn setBackgroundImage:image forState:UIControlStateNormal]; CGFloat btnX = i*btnW; CGFloat btnY = 0; btn.frame = CGRectMake(btnX, btnY, btnW, btnH); [self.scrollView addSubview:btn]; } _scrollView.contentSize = CGSizeMake(totalPage*btnW, btnH); _scrollView.pagingEnabled = YES; _scrollView.showsHorizontalScrollIndicator = NO; //设置代理有两种方式 设置 _scrollView.delegate = self; //设置pageControl的属性 self.pageControl.numberOfPages = totalPage; self.pageControl.currentPage = 0; [self startTimer]; #warning 新添加代码 GPAdsView *adsView = [GPAdsView adsView]; [self.view addSubview:adsView]; adsView.images = @[@"ad_00",@"ad_01",@"ad_02",@"ad_03",@"ad_04"]; // adsView.delegate = self; [adsView setAdsViewDidSelectedBlock:^(GPAdsView * adsView, NSString * image, NSInteger index) { [self adsViewDidSelected:adsView andImage:image andIndex:index]; }]; } -(BOOL)prefersStatusBarHidden { return YES; } - (void)adsViewDidSelected:(GPAdsView *)adsView andImage:(NSString *)image andIndex:(NSInteger)index { NSLog(@"图片名称 %@,索引值是 %ld",image,index); } //-(void)adsViewDidSelected:(GPAdsView *)adsView andImage:(NSString *)image andIndex:(NSInteger)index //{ // NSLog(@"图片名:%@,索引值:%ld",image,index); //} -(void)startTimer { //添加一个定时器 NSTimer * timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(autoScroll) userInfo:nil repeats:YES]; self.timer = timer; [[NSRunLoop currentRunLoop]addTimer:self.timer forMode:NSRunLoopCommonModes]; } -(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { [self.timer invalidate]; } -(void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset { [self startTimer]; } -(void)autoScroll { //1.得到偏移量 //2如何得大滚动的位置 int totalPage = 5; int page = self.pageControl.currentPage >=totalPage -1?0:self.pageControl.currentPage+1; self.scrollView.contentOffset = CGPointMake(page*self.scrollView.frame.size.width, 0); } //只要发生滚动就会自动调用 -(void)scrollViewDidScroll:(UIScrollView *)scrollView { CGPoint contentOffSet = self.scrollView.contentOffset; int page = (contentOffSet.x + self.scrollView.frame.size.width*0.5)/self.scrollView.frame.size.width; self.pageControl.currentPage = page; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } /* #pragma mark - Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { // Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller. } */ @end
封装之后:
- (void)viewDidLoad { [super viewDidLoad]; #warning 新增代码 GPAdsView * adsView = [GPAdsView adsView]; [self.view addSubview:adsView]; adsView.images = @[@"ad_00",@"ad_01",@"ad_02",@"ad_03",@"ad_04"]; // adsView.delegate = self; [adsView setAdsViewDidSelectedBlock:^(GPAdsView * adsView, NSString * image, NSInteger index) { [self adsViewDidSelected:adsView andImage:image andIndex:index]; }]; }
下面是封装的view 大家可以参考学习一下,有哪里不合适的大家可以多提建议
代码的注释写了不少 应该基本可以理解
// // GPAdsView.h #import <UIKit/UIKit.h> #import "UIView+UIViewFrame.h" /** * 设置代理 */ @class GPAdsView; @protocol GPAdsViewDelegate <NSObject> //-(void)adsViewDidSelected:(GPAdsView *)adsView andImage:(NSString *)image andIndex:(NSInteger)index; - (void)adsViewDidSelected:(GPAdsView *)adsView andImage:(NSString *)image andIndex:(NSInteger)index; @end @interface GPAdsView : UIView +(id)adsView; @property(nonatomic,copy)void(^adsViewDidSelectedBlock)(GPAdsView * adssView,NSString *image,NSInteger index); @property(nonatomic,assign)id<GPAdsViewDelegate>delegate; @property(nonatomic,strong)NSArray *images;//如果想要保存值的话必须用强指针!!!! @end
// // GPAdsView.m // 练习代码-8-14 #import "GPAdsView.h" //匿名扩展 @interface GPAdsView()<UIScrollViewDelegate> @property(nonatomic,weak)UIScrollView *scrollView; @property(nonatomic,weak)UIPageControl *pageControl; @property(nonatomic,strong)NSTimer *timer; @end @implementation GPAdsView +(id)adsView { return [[self alloc]init]; } -(id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { NSLog(@"调用initWithFrame"); //1.初始化scrollView UIScrollView *scrollView = [[UIScrollView alloc]init]; scrollView.delegate = self; scrollView.pagingEnabled =YES; //scrollView.showsHorizontalScrollIndicator = NO; [self addSubview:scrollView]; self.scrollView = scrollView; //2.初始化PageView UIPageControl *pageControl = [[UIPageControl alloc]init]; pageControl.pageIndicatorTintColor = [UIColor greenColor]; pageControl.currentPageIndicatorTintColor = [UIColor redColor]; [self addSubview:pageControl]; self.pageControl = pageControl; pageControl.currentPage = 0; } [self startTimer]; return self; } -(void)setImages:(NSArray *)images { _images = images; NSLog(@"%@",_images); //设置依赖数据的一些属性 //设置页码数 self.pageControl.numberOfPages = images.count; //设置scrollView 的contentSize 大小 self.scrollView.contentSize = CGSizeMake(self.frame.size.width*images.count, 0); for (int i = 0; i < images.count; i++) { UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; CGFloat btnW = self.scrollView.width; CGFloat btnH = self.scrollView.frame.size.height; CGFloat btnX = btnW *i ; CGFloat btnY = 0; btn.frame = CGRectMake(btnX, btnY, btnW, btnH); NSString *name = images[i]; UIImage *image = [UIImage imageNamed:name]; [btn setBackgroundImage:image forState:UIControlStateNormal]; btn.tag = i; [self.scrollView addSubview:btn]; [btn addTarget:self action:@selector(btnTouch:) forControlEvents:UIControlEventTouchUpInside]; } } -(void)btnTouch:(UIButton *)btn { NSLog(@"点击事件发生"); // [_delegate adsViewDidSelected:self andImage:self.images[btn.tag] andIndex:btn.tag]; [_delegate adsViewDidSelected:self andImage:self.images[btn.tag] andIndex:btn.tag]; NSLog(@"%@",self.images[btn.tag]); NSLog(@"-------------"); if (self.adsViewDidSelectedBlock) { self.adsViewDidSelectedBlock(self,self.images[btn.tag],btn.tag); } } -(void)willMoveToSuperview:(UIView *)newSuperview { //一般抽象出来的都是一个单独的UIView 如果有特殊的需求那么我们会继承 其他的类 //设置View的frame CGFloat selfX = 0; CGFloat selfY = 0; CGFloat selfW = newSuperview.frame.size.width; CGFloat selfH = 220; self.frame = CGRectMake(selfX, selfY, selfW, selfH); self.backgroundColor = [UIColor yellowColor]; //设置scrollview 的frame //self.scrollView.frame = CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height); self.scrollView.frame = self.bounds; self.scrollView.backgroundColor = [UIColor yellowColor]; //设置pageControl 的frame self.pageControl.frame = CGRectMake(0,self.frame.size.height-40, self.frame.size.width, 0); } #pragma 实现基本功能 点击拖动图片,pageContrl 的值发生改变 /** * 这里注意不要选错函数,函数的功能和作用都不一样 * * @param scrollView <#scrollView description#> */ -(void)scrollViewDidScroll:(UIScrollView *)scrollView { //获得偏移量 int page = (self.scrollView.contentOffset.x + self.frame.size.width*0.5)/self.frame.size.width; self.pageControl.currentPage = page; //NSLog(@"%d",page); } #pragma 实现自动滚动的功能 /** * 定时器 这里的定时器选需要注意 */ -(void)startTimer { // 每隔1秒中就会调用函数autoScroll 我们不用考虑他是怎样实现的 //要慢慢养成面向对象的变成思想 self.timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(autoScroll) userInfo:nil repeats:YES]; //这里设置事件很重要 防止用户交互时产生冲突 [[NSRunLoop currentRunLoop]addTimer:self.timer forMode:NSRunLoopCommonModes]; } -(void)autoScroll { //怎样使屏幕自动滚动??每当我们遇到问题时候都要思考 int totalPage = 5; int page = self.pageControl.currentPage >= totalPage -1?0:self.pageControl.currentPage + 1; self.scrollView.contentOffset = CGPointMake(self.scrollView.frame.size.width*page, 0); } -(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { [self.timer invalidate];//如果关闭之后无法开启 } -(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { [self startTimer]; } @end
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时间: 2024-10-12 05:28:32