iOS实现微信朋友圈与摇一摇功能

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{
}