应用管理的实现

  1 1、加载应用信息：
  2  1.1、直接在controller里进行懒加载：（get方法）
  3   1.1.1、先判断是否已经加载数据：if (array == nil)
  4      1.1.2、先找到plist文件的路径：NSString *path = [[NSBundle mainBundle] pathForResource:@"app" ofType:@"plist"];
  5   1.1.3、然后从文件中读取数据：array = [NSArray arrayWithContentsOfFile:path];
  6   1.1.4、把读到的数据返回；return array;
  7 1.2、封装成模型：
  8 + (NSMutableArray *)showAppInfos{
  9     NSString *path = [[NSBundle mainBundle] pathForResource:@"app" ofType:@"plist"];
 10     NSArray *array = [NSArray arrayWithContentsOfFile:path];
 11     NSMutableArray *tempArray = [NSMutableArray array];
 12     for (NSDictionary *dic in array) {
 13         AppInfos *appInfo = [AppInfos appInfosWithDic:dic];
 14         [tempArray addObject:appInfo];
 15     }
 16     return tempArray;
 17 }
 18 2、根据应用信息来创建界面应该显示的view;
 19 2.1、直接代码生成控件：（重点是计算九宫格坐标）
 20 // 动态生成9宫格的方块
 21     for (int i = 0; i < self.appInfos.count; i++) {
 22         //动态生成view
 23         UIView *subView = [[UIView alloc] init];
 24         [self.view addSubview:subView];
 25         //计算frame
 26         CGFloat subViewW = 100;
 27         CGFloat subViewH = 100;
 28 //        子view的横向间距  =  (父view的宽度- 3 * 子view的宽度) / 4
 29         CGFloat marginX = (self.view.frame.size.width - 3 * subViewW) / 4;
 30 //        子view的纵向间距 =  20
 31         CGFloat marginY = 20;
 32       
 33 //        当前子view的行号 = 当前遍历到得索引值 / 总列数
 34         int row = i / 3;
 35 //        当前子view的列号 = 当前遍历到得索引值 % 总列数
 36         int column = i % 3;
 37       
 38 //        子view横坐标的公式 =  子view的横向间距  +  列号 * (子view的横向间距+ 子view的宽度)
 39         CGFloat subViewX = marginX + column * (marginX + subViewW);
 40 //        子view纵坐标的公式 = 20 + 行号 * (子view的纵向间距+ 子view的高度)
 41         CGFloat subViewY = 30 + row * (marginY + subViewH);
 42         
 43         subView.frame = CGRectMake(subViewX, subViewY, subViewW, subViewH);
 44 
 45 AppInfos *appInfos = self.array[index];
 46 
 47  [self displaySubView:iconView andAppInfos:appInfos];
 48 
 49 - (void)displaySubView:(UIView *)iconView andAppInfos:(AppInfos *)appInfos{
 50     CGFloat iconViewW = iconView.frame.size.width;
 51     //CGFloat iconViewH = iconView.frame.size.height;
 52    //添加图片子控件
 53     UIImageView *imageView = [[UIImageView alloc] init];
 54     [iconView addSubview:imageView];
 55     
 56     CGFloat imageViewW = 60;
 57     CGFloat imageViewH = 60;
 58     CGFloat imageViewX = (iconViewW - imageViewW) / 2;
 59     CGFloat imageViewY = 0;
 60     
 61     imageView.frame = CGRectMake(imageViewX, imageViewY, imageViewW, imageViewH);
 62     imageView.image = [UIImage imageNamed:appInfos.icon];
 63     
 64     UILabel *labelView = [[UILabel alloc] init];
 65     [iconView addSubview:labelView];
 66     labelView.textAlignment = NSTextAlignmentCenter;
 67     
 68     CGFloat labelViewW = iconViewW;
 69     CGFloat labelViewH = (iconViewW - imageViewH) / 2;
 70     CGFloat labelViewX = 0;
 71     CGFloat labelViewY = imageViewH;
 72     labelView.frame = CGRectMake(labelViewX, labelViewY, labelViewW, labelViewH);
 73     labelView.font = [UIFont systemFontOfSize:15];
 74     labelView.text = appInfos.name;
 75     
 76     UIButton *btnView = [[UIButton alloc] init];
 77     [iconView addSubview:btnView];
 78     [btnView setBackgroundImage:[UIImage imageNamed:@"buttongreen"] forState:UIControlStateNormal];
 79     [btnView setBackgroundImage:[UIImage imageNamed:@"buttongreen_highlighted"] forState:UIControlStateHighlighted];
 80     
 81     CGFloat btnViewW = imageViewW;
 82     CGFloat btnViewH = labelViewH;
 83     CGFloat btnViewX = imageViewX;
 84     CGFloat btnViewY = CGRectGetMaxY(labelView.frame);
 85     btnView.frame = CGRectMake(btnViewX, btnViewY, btnViewW, btnViewH);
 86     [btnView setTitle:@"下载" forState:UIControlStateNormal];
 87     
 88     [btnView addTarget:self action:@selector(downLoadClick:) forControlEvents:UIControlEventTouchUpInside];
 89 }
 90 
 91 2.2、使用XIB自定义view：
 92           拉一个view控件，对该view的Simulated Metrics的size 选择为Freeform；
 93          接着拉UIImageView、UILabel、UIButton三个控件，并设置好坐标；
 94         把自定义的view的Custom  Class设置成继承自UIView的同名的类：即XIB名和类名一致；
 95        在同名类里定义一个应用信息的信息属性和一个返回自定义View的类方法：
 96 +(instancetype)appInfosView{
 97     AppInfosView *view = [[[NSBundle mainBundle] loadNibNamed:@"AppInfosView" owner:nil options:nil] lastObject];
 98     return view;
 99 }
100 定义应用信息的信息属性主要是重写它的get方法：（控制器就可以直接调用并显示数据）
101 -(void)setAppInfos:(AppInfos *)appInfos{
102     _appInfos = appInfos;
103     self.nameView.text = appInfos.name;
104     self.iconView.image = [UIImage imageNamed:appInfos.icon];
105 }
106 3、显示数据，并完成点击下载时的功能
107 - (IBAction)btnClick:(UIButton *)sender {
108     self.superview.UserInteractionEnabled = NO;
109     sender.enabled = NO;
110     UILabel *tipsLabelView = [[UILabel alloc] init];
111     [self.superview addSubview:tipsLabelView];
112     tipsLabelView.text = [NSString stringWithFormat:@"正在下载%@",self.appInfos.name];
113     tipsLabelView.textAlignment = NSTextAlignmentCenter;
114     CGFloat viewW = self.superview.frame.size.width / 2;
115     CGFloat viewH = 30;
116     CGFloat viewX = (self.superview.frame.size.width - viewW )/2;
117     CGFloat viewY = self.superview.frame.size.height / 2;
118     tipsLabelView.frame = CGRectMake(viewX, viewY, viewW, viewH);
119     tipsLabelView.backgroundColor = [UIColor grayColor];
120     
121     tipsLabelView.alpha = 0;
122     tipsLabelView.layer.cornerRadius = 5;
123     tipsLabelView.layer.masksToBounds = YES;
124     
125     [UIView animateWithDuration:2.0 animations:^{
126         tipsLabelView.alpha = 0.9;
127     } completion:^(BOOL finished) {
128         [UIView animateWithDuration:1.5 animations:^{
129             tipsLabelView.alpha = 0;
130         } completion:^(BOOL finished) {
131             self.superview.userInteractionEnabled = YES;
132         }];
133     }];
134 }
135 主要是实现动画效果。