iOS實現(xiàn)微信朋友圈與搖一搖功能

更新時間：2016年08月08日 10:24:44 投稿：lijiao

這篇文章主要為大家詳細介紹了iOS實現(xiàn)微信朋友圈與搖一搖功能，具有一定的參考價值，感興趣的小伙伴們可以參考一下

本Demo為練手小項目，主要是熟悉目前主流APP的架構模式.此項目中采用MVC設計模式,純代碼和少許XIB方式實現(xiàn).主要實現(xiàn)了朋友圈功能和搖一搖功能.

預覽效果:

主要重點

1.整體架構

利用UITabBarController和UINavigationController配合實現(xiàn).其中要注意定義基類,方便整體上的管理,例如對UINavigationController頭部的顏色,字體和渲染顏色等設置.以及對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.發(fā)現(xiàn)界面和我的界面

利用UITableViewController和Plist文件實現(xiàn)界面的展示.實現(xiàn)過程中有采用數(shù)據(jù)模型或直接利用字典等方式.這里的實現(xiàn)比較簡單,就不多說啦.

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

3.朋友圈功能的實現(xiàn)

這里面主要的難點在于朋友圈首頁的下拉刷新效果的實現(xiàn),和選擇照片頁的狀態(tài)重用問題,以及照片的傳遞和代理的實現(xiàn)等.

朋友圈首頁的下拉刷新效果:主要利用transform屬性和scrollview的多種滾動狀態(tài).

- (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來實現(xiàn)的.沒有直接調用系統(tǒng)的相冊,因此加大了難度.自定義了cell,并采用了代理方式來實現(xiàn)類與類之間的通信.

@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:@"最多選取9張照片哦,親!"delegate:nilcancelButtonTitle:@"確定"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.搖一搖功能的實現(xiàn)

搖一搖功能的本身實現(xiàn)十分簡單,就是調用系統(tǒng)的兩個方法即可.難點在于動畫效果.其實這里的動畫效果也不是很難.主要是計算有點復雜.可能是我在網(wǎng)上搜索到的素材有點不合適.導致要考慮各個控件的frame問題…

//實現(xiàn)搖一搖功能
- (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;
 
    //彈出搜索框
    [self showSearchView];
    [self.searchViewperformSelector:@selector(removeFromSuperview)withObject:nilafterDelay:2.4];
  }];
 
}];
}
//搖一搖結束后
- (void)motionEnded:(UIEventSubtype)motionwithEvent:(UIEvent *)event{
 
}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

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