前沿：整理了一个项目开发基础，涉及到开发初期的必备条件与开发中可以遵循的编码规范。源码请点击github地址下载。
目录
一.封装网络请求
1.封装get请求
code1.png
2.封装post请求
code2.png
3.使用方法
[LXNetWorkTool get:urlStr param:param success:^(NSDictionary *responseDic) {
NSLog(@"%@", responseDic);
} failure:^(NSError *error) {
}];
二.json转model
获取到网络json数据后，无论多么复杂的数据结构，嵌套多少层，使用mj的一个第三方一句代码将字典转化成model，如下：
LXStockResult *resultModel = [LXStockResult objectWithKeyValues:responseDic];
但是必须先根据responseDic的数据结构定义好在LXStockResult的属性列表，如这样的数据结构：
screen1.png
需创建的model文件如下：
screen2.png
对应的属性列表如下：
@interface LXStockResult : NSObject
@property (nonatomic, strong) LXStockResponse *response;
@end
@interface LXStockResponse : NSObject
@property (nonatomic, strong) LXStockResponseStatus *responseStatus;
@property (nonatomic, strong) NSArray *stockList;
@end
@implementation LXStockResponse
+ (NSDictionary *)objectClassInArray
{
return @{@"stockList":[LXStockList class]};
}
@end
@interface LXStockResponseStatus : NSObject
@property (nonatomic, copy) NSString *status;
@property (nonatomic, copy) NSString *statusInfo;
@end
@interface LXStockList : NSObject
@property (nonatomic, copy) NSString *stockCode;
@property (nonatomic, copy) NSString *stockName;
@end
三.方法顺序
#pragma mark - Life cycle
#pragma mark - Init data
#pragma mark - Loading data
#pragma mark - Create view
#pragma mark - UITableViewDelegate
#pragma mark - SystemDelegate
#pragma mark - CustomDelegate
#pragma mark - Observer
#pragma mark - Enent response
#pragma mark - Private methods
#pragma mark - Setter and getter
将方法顺序整理，利于快速查找方法，易于后期维护
展示效果如图：
screen4.png
四.文件结构
如下图：
screen3.png
有一个清晰的文件结构，利于理解业务与后期维护。
五.TableView自动布局
[LXNetWorkTool get:urlStr param:param success:^(NSDictionary *responseDic) {
LXStockResult *resultModel = [LXStockResult objectWithKeyValues:responseDic];
//这里将stockList模型数组再封装，通过model的数据与cell控件结合算出文本高。
[self.showDataArr setArray:[self manageViewsFrameWithDatas:resultModel.response.stockList]];
[self.tableView reloadData];
} failure:^(NSError *error) {
}];
- (NSArray *)manageViewsFrameWithDatas:(NSArray *)datas
{
NSMutableArray *tempArr = [NSMutableArray array];
for (LXStockList *listModel in datas) {
LXTestStockFrame *frame = [[LXTestStockFrame alloc] init];
frame.model = listModel;
[tempArr addObject:frame];
}
return tempArr;
}
- (void)setModel:(LXStockList *)model
{
_model = model;
CGFloat stockNameLabelW = kScreenWidth - 2*globalAlignMargin;
CGFloat stockNameLabelH = [LXHelpClass calculateLabelighWithText:model.stockName withMaxSize:CGSizeMake(stockNameLabelW, MAXFLOAT) withFont:18];
self.stockNameLabelFrame = CGRectMake(globalAlignMargin, 12, stockNameLabelW, stockNameLabelH);
CGFloat stockCodeLabelY = self.stockNameLabelFrame.origin.y + self.stockNameLabelFrame.size.height + 5;
self.stockCodeLabelFrame = CGRectMake(self.stockNameLabelFrame.origin.x, stockCodeLabelY, 100, 12);
self.cellHeight = self.stockCodeLabelFrame.origin.y + self.stockCodeLabelFrame.size.height + 12;
}
@interface LXTestStockFrame : NSObject
//数据源
@property (nonatomic, strong) LXStockList *model;
//cell高
@property (nonatomic, assign) CGFloat cellHeight;
//stockNameLabel的坐标
@property (nonatomic, assign) CGRect stockNameLabelFrame;
//stockCodeLabel的坐标
@property (nonatomic, assign) CGRect stockCodeLabelFrame;
@end
- (void)configurationCell:(LXTestStockFrame *)frameModel;
{
self.stockNameLabel.frame = frameModel.stockNameLabelFrame;
self.stockNameLabel.text = frameModel.model.stockName;
self.stockCodeLabel.frame = frameModel.stockCodeLabelFrame;
self.stockCodeLabel.text = frameModel.model.stockCode;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
LXTestStockFrame *frame = self.showDataArr[indexPath.row];
return frame.cellHeight;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//如果有多种样式的cell，则可以根据区别indexPath.section或indexPath.row去创建不同的cell
if (indexPath.section == 0) {
LXTestTableCell *cell = [LXTestTableCell cellWithTableView:tableView];
cell.row = indexPath.row;
[cell configurationCell:self.showDataArr[indexPath.row]];
return cell;
} else {
LXTestTableCell *cell = [LXTestTableCell cellWithTableView:tableView];
cell.row = indexPath.row;
[cell configurationCell:self.showDataArr[indexPath.row]];
return cell;
}
}
六.复用UITableViewHeaderFooterView
若UITableViewHeaderFooterView不采用复用机制，那么每次滑动TableView看见HeaderFooterView时都会掉用下面的代理方法从而不断重复创建
- (nullable UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
LXTestHeaderView *headerView = [LXTestHeaderView headerViewWithTableView:tableView];
return headerView;
}
@implementation LXTestHeaderView
+ (instancetype)headerViewWithTableView:(UITableView *)tableView
{
static NSString *headerId = @"headerView";
LXTestHeaderView *headerView = [tableView dequeueReusableHeaderFooterViewWithIdentifier:headerId];
if (headerView == nil) {
headerView = [[LXTestHeaderView alloc] initWithReuseIdentifier:headerId];
}
return headerView;
}
- (instancetype)initWithReuseIdentifier:(NSString *)reuseIdentifier
{
if (self = [super initWithReuseIdentifier:reuseIdentifier]) {
self.backgroundColor = globalGrayColor;
UILabel *title = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, 44)];
title.text = @"headerView也需要用复用池";
title.textColor = globalRedWordColor;
title.textAlignment = NSTextAlignmentCenter;
title.font = [UIFont systemFontOfSize:18];
[self addSubview:title];
}
return self;
}
七.计算文本内容大小
1.计算普通文本的高
+ (CGFloat)calculateLabelighWithText:(NSString *)textStr withMaxSize:(CGSize)maxSize withFont:(CGFloat)font
{
NSDictionary * tdic = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:font], NSFontAttributeName, nil];
CGSize actualSize = [textStr boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:tdic context:nil].size;
return actualSize.height;
}
2.计算富文本的高
#define GetLabelNormalHeight(height,font,spaceH) (height + (height - [UIFont systemFontOfSize:font].pointSize)*(spaceH>0 ? spaceH : 0.05))
/**
*@param textStr 富文本的string属性的值
*@param maxSize 控件所需最大空间，一般高是最大值，如：CGSizeMake(stockNameLabelW, MAXFLOAT)
*@param font 字体大小
*@param spaceRH label行距占行高的比例，若没有设置行高，默认值为0.05
*/
+ (CGFloat)calculateLabelighWithText:(NSString *)textStr withMaxSize:(CGSize)maxSize withFont:(CGFloat)font withSpaceRH:(CGFloat)spaceRH
{
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineBreakMode = NSLineBreakByCharWrapping;
NSDictionary *dic = @{NSFontAttributeName: [UIFont systemFontOfSize:font], NSParagraphStyleAttributeName:paragraphStyle.copy};
CGRect rect = [textStr boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:dic context:nil];
return GetLabelNormalHeight(rect.size.height, font, spaceRH);
}
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