本Demo为练手小项目，主要是熟悉目前主流APP的架构模式.此项目中采用MVC设计模式,纯代码和少许XIB方式实现.主要实现了朋友圈功能和摇一摇功能.

预览效果:

主要重点

1.整体架构

利用UITabBarController和UINavigationController配合实现.其中要注意定义基类,方便整体上的管理,例如对UINavigationController头部的颜色,字体和渲染颜色等设置.以及对UITabBarController的底部的渲染等.

[self.navigationBarsetBackgroundImage:[UIImageimageNamed:@"Dimensional-_Code_Bg"]forBarMetrics:UIBarMetricsDefault]; [self.navigationBarsetTitleTextAttributes:@{ NSForegroundColorAttributeName:[UIColor whiteColor] }]; [self.navigationBarsetTintColor:[UIColor whiteColor]];

2.发现界面和我的界面

利用UITableViewController和Plist文件实现界面的展示.实现过程中有采用数据模型或直接利用字典等方式.这里的实现比较简单,就不多说啦.

- (instancetype)initWithDict:(NSDictionary *)dict{ if (self = [super init]) { [selfsetValuesForKeysWithDictionary:dict];}return self;} + (instancetype)pictureWithDict:(NSDictionary *)dict{ return [[self alloc]initWithDict:dict];}

3.朋友圈功能的实现

这里面主要的难点在于朋友圈首页的下拉刷新效果的实现,和选择照片页的状态重用问题,以及照片的传递和代理的实现等.

朋友圈首页的下拉刷新效果:主要利用transform属性和scrollview的多种滚动状态.

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{ self.dragging = YES;}- (void)scrollViewDidScroll:(UIScrollView *)scrollView{ if (self.num == 0) { self.num ++; return;} CGFloat offsetY = scrollView.contentOffset.y; CGFloat angle = -offsetY* M_PI / 30; if (self.dragging == YES) { if (offsetY <= 110) { self.containerView.y = 10 + offsetY; } }else { if (self.currentY < 120) { self.containerView.y = 10 + offsetY; } }self.activityView.transform = CGAffineTransformMakeRotation(angle); }- (void)scrollViewDidEndDragging:(UIScrollView *)scrollViewwillDecelerate:(BOOL)decelerate{ self.dragging = NO; CGFloat currentY = self.containerView.y;self.currentY = currentY; } - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{ [UIViewanimateWithDuration:0.25animations:^{ self.containerView.frame = CGRectMake(15, 120, 30, 30); self.activityView.transform = CGAffineTransformMakeRotation(2 * M_PI);}]; }

其中照片的展示是采用UICollectionViewController来实现的.没有直接调用系统的相册,因此加大了难度.自定义了cell,并采用了代理方式来实现类与类之间的通信.

@protocol YYPictureCellDelegate @optional- (void)pictureCell:(YYPictureCell *)cellwithDidClickBtn:(UIButton *)btn; @end - (IBAction)clickSureBtn:(UIButton *)sender { if ([self.delegaterespondsToSelector:@selector(pictureCell:withDidClickBtn:)]) { [self.delegatepictureCell:selfwithDidClickBtn:sender];}} - (void)pictureCell:(YYPictureCell *)cellwithDidClickBtn:(UIButton *)btn{ if ((self.selectedBtn.count == 9) && (!btn.isSelected)) { UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nilmessage:@"最多选取9张照片哦,亲!"delegate:nilcancelButtonTitle:@"确定"otherButtonTitles: nil]; [alertshow]; return;} btn.selected = !btn.isSelected; NSIndexPath *indexPath = [self.collectionViewindexPathForCell:cell]; YYPictureModel *model = self.dataArray[indexPath.row]; if (btn.isSelected) { model.clickedBtn = YES; [self.selectedBtnaddObject:btn]; [self.selImageArrayaddObject:model]; } else{ model.clickedBtn = NO; [self.selectedBtnremoveObject:btn]; [self.selImageArrayremoveObject:model];} if (self.selectedBtn.count > 0) { self.doneBtn.enabled = YES; self.doneBtn.selected = YES; self.previewBtn.enabled = YES; self.previewBtn.selected = YES;}else { self.doneBtn.enabled = NO; self.doneBtn.selected = NO; self.previewBtn.enabled = NO; self.previewBtn.selected = NO;} }

4.摇一摇功能的实现

摇一摇功能的本身实现十分简单,就是调用系统的两个方法即可.难点在于动画效果.其实这里的动画效果也不是很难.主要是计算有点复杂.可能是我在网上搜索到的素材有点不合适.导致要考虑各个控件的frame问题…

//实现摇一摇功能- (void)motionBegan:(UIEventSubtype)motionwithEvent:(UIEvent *)event{ self.upLine.hidden = NO;self.downLine.hidden = NO;[UIViewanimateWithDuration:0.6animations:^{ self.upImageView.y -= 60; self.upLine.y -= 60; self.downImageView.y += 60; self.downLine.y += 60; }completion:^(BOOL finished) { [UIViewanimateWithDuration:0.6animations:^{ self.upImageView.y += 60; self.upLine.y += 60; self.downImageView.y -= 60; self.downLine.y -= 60; }completion:^(BOOL finished) { self.upLine.hidden = YES; self.downLine.hidden = YES; //弹出搜索框 [self showSearchView]; [self.searchViewperformSelector:@selector(removeFromSuperview)withObject:nilafterDelay:2.4]; }]; }];}//摇一摇结束后- (void)motionEnded:(UIEventSubtype)motionwithEvent:(UIEvent *)event{ }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。