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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.navigationBar setBackgroundImage:[UIImage imageNamed:@"Dimensional-_Code_Bg"] forBarMetrics:UIBarMetricsDefault]; [self.navigationBar setTitleTextAttributes:@{ NSForegroundColorAttributeName:[UIColor whiteColor] }];[self.navigationBar setTintColor:[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]) { [self setValuesForKeysWithDictionary: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 *)scrollView willDecelerate:(BOOL)decelerate{self.dragging = NO;CGFloat currentY = self.containerView.y;self.currentY = currentY;}- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{[UIView animateWithDuration:0.25 animations:^{ 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 <NSObject>@optional- (void)pictureCell:(YYPictureCell *)cell withDidClickBtn:(UIButton *)btn;@end- (IBAction)clickSureBtn:(UIButton *)sender {if ([self.delegate respondsToSelector:@selector(pictureCell:withDidClickBtn:)]) { [self.delegate pictureCell:self withDidClickBtn:sender];}}- (void)pictureCell:(YYPictureCell *)cell withDidClickBtn:(UIButton *)btn{if ((self.selectedBtn.count == 9) && (!btn.isSelected)) { UIAlertView *alert = [[UIAlertView alloc]initWithTitle:nil message:@"最多选取9张照片哦,亲!" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil]; [alert show]; return;}btn.selected = !btn.isSelected;NSIndexPath *indexPath = [self.collectionView indexPathForCell:cell];YYPictureModel *model = self.dataArray[indexPath.row];if (btn.isSelected) { model.clickedBtn = YES; [self.selectedBtn addObject:btn]; [self.selImageArray addObject:model];} else{ model.clickedBtn = NO; [self.selectedBtn removeObject:btn]; [self.selImageArray removeObject: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)motion withEvent:(UIEvent *)event{self.upLine.hidden = NO;self.downLine.hidden = NO;[UIView animateWithDuration:0.6 animations:^{ self.upImageView.y -= 60; self.upLine.y -= 60; self.downImageView.y += 60; self.downLine.y += 60;}completion:^(BOOL finished) { [UIView animateWithDuration:0.6 animations:^{ 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.searchView performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:2.4]; }];}];}//摇一摇结束后- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event{}结束语:
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