RATreeView是一个第三方的iOS树视图(通俗的讲就是折叠单元格),它是对UITableView的封装,定义自己的委托和数据源的法,RATreeView是高度可定制的,并且有很多功能。很多朋友都说使用的不好,官方讲的也不够详细,所以我就给大家讲一下,怎么使用.
- 首先先看下实现效果
- 使用方法
CocoaPods pod 'RATreeView', '~> 2.1.0'
- 具体使用 1.创建model
#import@interface RaTreeModel : NSObject@property (nonatomic,copy) NSString *name;//标题@property (nonatomic,strong) NSArray *children;//子节点数组//初始化一个model- (id)initWithName:(NSString *)name children:(NSArray *)array;//遍历构造器+ (id)dataObjectWithName:(NSString *)name children:(NSArray *)children;@end复制代码
#import "RaTreeModel.h"@implementation RaTreeModel- (id)initWithName:(NSString *)name children:(NSArray *)children{ self = [super init]; if (self) { self.children = children; self.name = name; } return self;}+ (id)dataObjectWithName:(NSString *)name children:(NSArray *)children{ return [[self alloc] initWithName:name children:children];}@end复制代码 2.创建cell
- 特别注意 xib创建的cell, 一定不要勾选Use Auto Layout,否则cell上的布局不会执行.
找不到的,请看下图
cell创建具体如下:
这是我用xib设置的cell,你们按照你们的需求做
#import@interface RaTreeViewCell : UITableViewCell@property (weak, nonatomic) IBOutlet UIImageView *iconView;//图标@property (weak, nonatomic) IBOutlet UILabel *titleLable;//标题//赋值- (void)setCellBasicInfoWith:(NSString *)title level:(NSInteger)level children:(NSInteger )children;@end复制代码
#import "RaTreeViewCell.h"@interface RaTreeViewCell ()@end@implementation RaTreeViewCell- (void)awakeFromNib { // Initialization code self.selectionStyle = UITableViewCellSelectionStyleNone;}- (void)setSelected:(BOOL)selected animated:(BOOL)animated { [super setSelected:selected animated:animated]; // Configure the view for the selected state}- (void)setCellBasicInfoWith:(NSString *)title level:(NSInteger)level children:(NSInteger )children{ //有自孩子时显示图标 if (children==0) { self.iconView.hidden = YES; } else { //否则不显示 self.iconView.hidden = NO; } self.titleLable.text = title; self.iconView.image = [UIImage imageNamed:@"close"]; //每一层的布局 CGFloat left = 10+level*30; //头像的位置 CGRect iconViewFrame = self.iconView.frame; iconViewFrame.origin.x = left; self.iconView.frame = iconViewFrame; //title的位置 CGRect titleFrame = self.titleLable.frame; titleFrame.origin.x = 40+left; self.titleLable.frame = titleFrame; }复制代码 3.创建RATreeView 只展示核心代码
######数据
//加载数据- (void)setData { //宝鸡市 (四层) RaTreeModel *zijingcun = [RaTreeModel dataObjectWithName:@"紫荆村" children:nil]; RaTreeModel *chengcunzheng = [RaTreeModel dataObjectWithName:@"陈村镇" children:@[zijingcun]]; RaTreeModel *fengxiang = [RaTreeModel dataObjectWithName:@"凤翔县" children:@[chengcunzheng]]; RaTreeModel *qishan = [RaTreeModel dataObjectWithName:@"岐山县" children:nil]; RaTreeModel *baoji = [RaTreeModel dataObjectWithName:@"宝鸡市" children:@[fengxiang,qishan]]; //西安市 RaTreeModel *yantaqu = [RaTreeModel dataObjectWithName:@"雁塔区" children:nil]; RaTreeModel *xinchengqu = [RaTreeModel dataObjectWithName:@"新城区" children:nil]; RaTreeModel *xian = [RaTreeModel dataObjectWithName:@"西安" children:@[yantaqu,xinchengqu]]; RaTreeModel *shanxi = [RaTreeModel dataObjectWithName:@"陕西" children:@[baoji,xian]]; [self.modelArray addObject:shanxi];}复制代码 #######代理方法
#pragma mark -----------delegate //返回行高- (CGFloat)treeView:(RATreeView *)treeView heightForRowForItem:(id)item { return 50;}//将要展开- (void)treeView:(RATreeView *)treeView willExpandRowForItem:(id)item { RaTreeViewCell *cell = (RaTreeViewCell *)[treeView cellForItem:item]; cell.iconView.image = [UIImage imageNamed:@"open"]; }//将要收缩- (void)treeView:(RATreeView *)treeView willCollapseRowForItem:(id)item { RaTreeViewCell *cell = (RaTreeViewCell *)[treeView cellForItem:item]; cell.iconView.image = [UIImage imageNamed:@"close"];}//已经展开- (void)treeView:(RATreeView *)treeView didExpandRowForItem:(id)item { NSLog(@"已经展开了");}//已经收缩- (void)treeView:(RATreeView *)treeView didCollapseRowForItem:(id)item { NSLog(@"已经收缩了");}复制代码 ####### dataSource方法
//返回cell- (UITableViewCell *)treeView:(RATreeView *)treeView cellForItem:(id)item { //获取cell RaTreeViewCell *cell = [treeView dequeueReusableCellWithIdentifier:@"RaTreeViewCell"]; //当前item RaTreeModel *model = item; //当前层级 NSInteger level = [treeView levelForCellForItem:item]; //赋值 [cell setCellBasicInfoWith:model.name level:level children:model.children.count]; return cell;}/** * 必须实现 * * @param treeView treeView * @param item 节点对应的item * * @return 每一节点对应的个数 */- (NSInteger)treeView:(RATreeView *)treeView numberOfChildrenOfItem:(id)item{ RaTreeModel *model = item; if (item == nil) { return self.modelArray.count; } return model.children.count;}/** *必须实现的dataSource方法 * * @param treeView treeView * @param index 子节点的索引 * @param item 子节点索引对应的item * * @return 返回 节点对应的item */- (id)treeView:(RATreeView *)treeView child:(NSInteger)index ofItem:(id)item { RaTreeModel *model = item; if (item==nil) { return self.modelArray[index]; } return model.children[index];}//cell的点击方法- (void)treeView:(RATreeView *)treeView didSelectRowForItem:(id)item { //获取当前的层 NSInteger level = [treeView levelForCellForItem:item]; //当前点击的model RaTreeModel *model = item; NSLog(@"点击的是第%ld层,name=%@",level,model.name);}//单元格是否可以编辑 默认是YES- (BOOL)treeView:(RATreeView *)treeView canEditRowForItem:(id)item { return YES;}//编辑要实现的方法- (void)treeView:(RATreeView *)treeView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowForItem:(id)item { NSLog(@"编辑了实现的方法");}复制代码 4.基本能用到的方法 我都写了注释,如有错误请指出.是不是比官方的清楚的多.
demo地址: