自动布局（FDTemplateLayoutCell的使用）
来源：互联网 发布：js调用另外一个js方法 编辑：程序博客网 时间：2024/06/14 05:44
今天看到了@SUNNYXX大神的博客，其中有一篇优化UITableViewCell高度计算的那些事讲了FDTemplateLayoutCell,并且与其它两个布局方法做了对比，好处显而易见（最低适配iOS6、运行效率更高）。分别是iOS6的-systemLayoutSizeFittingSize:的API和iOS8的self-sizing cell(estimatedRowHeight、UITableViewAutomaticDimension)方法。上面两个方法之前也在博客中写过。
作为一个开发还没到一年的人，@SUNNYXX大神、喵神等都是学习的榜样，各种崇拜。
不同与Xib+FDTemplateLayoutCell的布局方法，我用的是Masonry+FDTemplateLayoutCell,运行时总是有很多约束冲突，对于原因暂时还不知道。
ViewController
#import "ViewController.h"#import "CustomCell.h"#import "Masonry.h"#import "UITableView+FDTemplateLayoutCell.h"#import "CustomModel.h"#import "MHPrettyDate.h"typedef NS_ENUM(NSUInteger, HTSimulatedCacheModel) { HTSimulatedCacheModelNone=0, HTSimulatedCacheModelCacheByIndexpath, HTSimulatedCacheModelCacheByKey};#define COMMON_COLOR [UIColor colorWithRed:0/255.0f green:0/255.0f blue:107/255.0f alpha:1.0]#define REUSEID @"CustomCellId"@interface ViewController () <UITableViewDataSource,UITableViewDelegate,UIActionSheetDelegate>//@property(nonatomic,retain) UIRefreshControl *kRefreshControl;@property(nonatomic,retain) UISegmentedControl *kSegmentedControl;@property(nonatomic,retain) UITableView *kTabelView;@property(nonatomic,retain) NSMutableArray *kDataSource;@end@implementation ViewController#pragma mark - Life Cycle- (void)viewDidLoad { [super viewDidLoad]; [self uiConfig]; [self buildTestDataThen:^{ [self.kTabelView reloadData]; NSLog(@"count=%ld",self.kDataSource.count); }];}- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning];}#pragma mark - UITableViewDataSource-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{ return [self.kDataSource count];}-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ NSArray *tempArr=[self.kDataSource objectAtIndex:section]; return [tempArr count];}-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ CustomCell *cell=[tableView dequeueReusableCellWithIdentifier:REUSEID forIndexPath:indexPath]; [self configureCell:cell atIndexpath:indexPath]; return cell;}-(void)configureCell:(CustomCell *)cell atIndexpath:(NSIndexPath *)indexPath{ cell.fd_enforceFrameLayout=NO; if (indexPath.row%2==0) { cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator; }else{ cell.accessoryType=UITableViewCellAccessoryCheckmark; } NSArray *tempArr=[self.kDataSource objectAtIndex:indexPath.section]; [cell setModel:[tempArr objectAtIndex:indexPath.row]];}#pragma mark - UITableViewDelegate-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{ HTSimulatedCacheModel model=self.kSegmentedControl.selectedSegmentIndex; switch (model) { case HTSimulatedCacheModelNone: return [tableView fd_heightForCellWithIdentifier:REUSEID configuration:^(id cell) { [self configureCell:cell atIndexpath:indexPath]; }]; case HTSimulatedCacheModelCacheByIndexpath: return [tableView fd_heightForCellWithIdentifier:REUSEID cacheByIndexPath:indexPath configuration:^(id cell) { [self configureCell:cell atIndexpath:indexPath]; }]; case HTSimulatedCacheModelCacheByKey: return [tableView fd_heightForCellWithIdentifier:REUSEID cacheByKey:[NSString stringWithFormat:@"key:%ld",indexPath.row] configuration:^(id cell) { [self configureCell:cell atIndexpath:indexPath]; }]; default: break; }}//-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{// if (editingStyle==UITableViewCellEditingStyleDelete) {// NSMutableArray *tempArr=[self.kDataSource objectAtIndex:indexPath.section];// [tempArr removeObjectAtIndex:indexPath.row];// [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];// }//}////-(NSString *)tableView:(UITableView *)tableView titleForDeleteConfirmationButtonForRowAtIndexPath:(NSIndexPath *)indexPath{// return @"删除";//}//或者- (nullable NSArray<UITableViewRowAction *> *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath{ UITableViewRowAction *action=[UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:@"删除" handler:^(UITableViewRowAction * _Nonnull action, NSIndexPath * _Nonnull indexPath) { NSMutableArray *tempArr=[self.kDataSource objectAtIndex:indexPath.section]; [tempArr removeObjectAtIndex:indexPath.row]; [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; }]; action.backgroundColor=COMMON_COLOR; return @[action];}#pragma mark - UIActionSheetDelegate-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{ SEL selectors[]={ @selector(insertRow), @selector(insertSection), @selector(deleteSection) }; if (buttonIndex<sizeof(selectors)/sizeof(SEL)) { void(*imp)(id,SEL)=(typeof(imp))[self methodForSelector:selectors[buttonIndex]]; imp(self,selectors[buttonIndex]); }}#pragma mark - Private Method//模拟异步请求 然后回调-(void)buildTestDataThen:(void(^)(void))then{ [self.kDataSource removeAllObjects]; dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ NSMutableArray *tempArr=[[NSMutableArray alloc] init]; for (int i=0; i<20; i++) { [tempArr addObject:[self getRandomModelWithIndex:i]]; } [self.kDataSource addObject:tempArr]; //回调 dispatch_sync(dispatch_get_main_queue(), ^{ !then ? :then(); }); });}-(CustomModel *)getRandomModelWithIndex:(int)index{ CustomModel *model=[[CustomModel alloc] init]; model.kTitle=[NSString stringWithFormat:@"Title:%d",index]; model.kImgName=[NSString stringWithFormat:@"%d.png",arc4random()%6+1]; model.kContent=[self getRandomContent]; model.kDataStr=[MHPrettyDate prettyDateFromDate:[NSDate date] withFormat:MHPrettyDateFormatWithTime]; model.kAuthor=[NSString stringWithFormat:@"Author:%d",index]; return model;}-(void)uiConfig{ self.view.backgroundColor=[UIColor lightTextColor]; self.title=@"CellLayoutDemo"; UIBarButtonItem *rightItem=[[UIBarButtonItem alloc] initWithTitle:@"Action" style:UIBarButtonItemStylePlain target:self action:@selector(rightItemAction)]; self.navigationItem.rightBarButtonItem=rightItem; self.edgesForExtendedLayout=UIRectEdgeNone; [self.view addSubview:self.kTabelView]; self.kTabelView.tableHeaderView=self.kSegmentedControl; [self.kTabelView mas_makeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.view.mas_top).offset(10); make.left.right.bottom.equalTo(self.view); }];}-(NSString *)getRandomContent{ NSInteger num=arc4random()%10+1; NSMutableString *mutString=[[NSMutableString alloc] init]; while (num>0) { [mutString appendString:@"不要假设我知道，一切也都是为我而做，为何这么伟大."]; num-=1; } return mutString;}#pragma mark - Action Method-(void)rightItemAction{ UIActionSheet *actionSheet=[[UIActionSheet alloc ] initWithTitle:@"Actions" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Insert a row",@"Insert a section", @"Delete a section",nil]; [actionSheet showInView:self.view];}-(void)insertRow{ if ([self.kDataSource count]==0) { [self insertSection]; }else{ NSMutableArray *tempArr=[self.kDataSource firstObject]; [tempArr insertObject:[self getRandomModelWithIndex:0] atIndex:0]; NSIndexPath *indexPath=[NSIndexPath indexPathForRow:0 inSection:0]; [self.kTabelView insertRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic]; }}-(void)insertSection{ NSMutableArray *tempArr=[[NSMutableArray alloc] init]; [tempArr addObject:[self getRandomModelWithIndex:0]]; [self.kDataSource insertObject:tempArr atIndex:0]; [self.kTabelView insertSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationAutomatic];}-(void)deleteSection{ if ([self.kDataSource count]>0) { [self.kDataSource removeObjectAtIndex:0]; [self.kTabelView deleteSections:[NSIndexSet indexSetWithIndex:0] withRowAnimation:UITableViewRowAnimationAutomatic]; }}#pragma mark - Lazy Method//-(UIRefreshControl *)kRefreshControl{// if (_kRefreshControl==nil) {// _kRefreshControl=[[UIRefreshControl alloc] init];// _kRefreshControl.tintColor=COMMON_COLOR;// }// return _kRefreshControl;//}-(UISegmentedControl *)kSegmentedControl{ if (_kSegmentedControl==nil) { _kSegmentedControl=[[UISegmentedControl alloc] initWithItems:@[@"No Cache",@"IndexPath Cache",@"Key Cache"]]; _kSegmentedControl.frame=CGRectMake(20, 0, self.kTabelView.frame.size.width-40, 30); _kSegmentedControl.tintColor=COMMON_COLOR; _kSegmentedControl.selectedSegmentIndex=0; } return _kSegmentedControl;}-(UITableView *)kTabelView{ if (_kTabelView==nil) { _kTabelView=[[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStylePlain]; _kTabelView.backgroundColor=[UIColor lightGrayColor]; _kTabelView.tableFooterView=[UIView new]; _kTabelView.dataSource=self; _kTabelView.delegate=self; [_kTabelView registerClass:[CustomCell class] forCellReuseIdentifier:REUSEID];// _kTabelView.estimatedRowHeight=200;// _kTabelView.rowHeight=UITableViewAutomaticDimension; } return _kTabelView;}-(NSMutableArray *)kDataSource{ if (_kDataSource==nil) { _kDataSource=[[NSMutableArray alloc] init]; } return _kDataSource;}@endCustomCell
#import "CustomCell.h"#import "Masonry.h"#define COMMON_COLOR [UIColor colorWithRed:0/255.0f green:0/255.0f blue:107/255.0f alpha:1.0]#define CUSTOM_LIGHTGRAY_COLOR [UIColor colorWithRed:85/255.0f green:85/255.0f blue:85/255.0f alpha:1.0]#define CUSTOM_BLUE_COLOR [UIColor colorWithRed:140/255.0f green:170/255.0f blue:228/255.0f alpha:1.0]@interface CustomCell ()@property(nonatomic,retain) UILabel *kTitleLabel,*kContentLabel,*kAuthorLabel,*kDateLabel;@property(nonatomic,retain) UIImageView *kIconView;@end@implementation CustomCell#pragma mark - Override-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{ self=[super initWithStyle:style reuseIdentifier:reuseIdentifier]; if (self) { [self uiConfig]; } return self;}#pragma mark - Public Method-(void)setModel:(CustomModel *)model{ self.kTitleLabel.text=model.kTitle; self.kContentLabel.text=model.kContent; self.kAuthorLabel.text=model.kAuthor; self.kDateLabel.text=model.kDataStr; self.kIconView.image=[UIImage imageNamed:model.kImgName];}#pragma mark - Private Method-(void)uiConfig{ self.selectionStyle=UITableViewCellSelectionStyleNone; [self.contentView addSubview:self.kTitleLabel]; [self.contentView addSubview:self.kContentLabel]; [self.contentView addSubview:self.kIconView]; [self.contentView addSubview:self.kAuthorLabel]; [self.contentView addSubview:self.kDateLabel]; [self.kTitleLabel mas_makeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.contentView.mas_top).offset(10); make.left.equalTo(self.contentView.mas_left).offset(10); make.width.mas_equalTo(100); make.height.mas_equalTo(15); }]; [self.kContentLabel mas_makeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.kTitleLabel.mas_bottom).offset(10); make.left.equalTo(self.contentView.mas_left).offset(10); make.right.equalTo(self.contentView.mas_right).offset(-15); }];// [self.kContentLabel setContentCompressionResistancePriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];// [self.kContentLabel setContentHuggingPriority:UILayoutConstraintAxisVertical forAxis:UILayoutConstraintAxisVertical]; [self.kIconView mas_makeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.kContentLabel.mas_bottom).offset(10); make.left.equalTo(self.contentView.mas_left).offset(10); make.right.lessThanOrEqualTo(self.contentView.mas_right).offset(-16); make.bottom.equalTo(self.kAuthorLabel.mas_bottom).offset(-20); }]; [self.kAuthorLabel mas_makeConstraints:^(MASConstraintMaker *make) { make.bottom.equalTo(self.contentView.mas_bottom).offset(-10); make.left.equalTo(self.contentView.mas_left).offset(10); make.width.mas_equalTo(100); make.height.mas_equalTo(15); }]; [self.kDateLabel mas_makeConstraints:^(MASConstraintMaker *make) { make.bottom.height.equalTo(self.kAuthorLabel); make.right.equalTo(self.contentView.mas_right).offset(-20); make.width.mas_equalTo(60); }];}#pragma mark - Private Method-(UILabel *)kTitleLabel{ if (_kTitleLabel==nil) { _kTitleLabel=[[UILabel alloc] init]; _kTitleLabel.textColor=COMMON_COLOR; _kTitleLabel.font=[UIFont boldSystemFontOfSize:16]; } return _kTitleLabel;}-(UILabel *)kContentLabel{ if (_kContentLabel==nil) { _kContentLabel=[[UILabel alloc] init]; _kContentLabel.numberOfLines=0; _kContentLabel.lineBreakMode=NSLineBreakByWordWrapping; _kContentLabel.textColor=CUSTOM_LIGHTGRAY_COLOR; _kContentLabel.font=[UIFont systemFontOfSize:14]; } return _kContentLabel;}-(UILabel *)kAuthorLabel{ if (_kAuthorLabel==nil) { _kAuthorLabel=[[UILabel alloc] init]; _kAuthorLabel.textColor=[UIColor lightGrayColor]; _kAuthorLabel.font=[UIFont systemFontOfSize:14]; } return _kAuthorLabel;}-(UILabel *)kDateLabel{ if (_kDateLabel==nil) { _kDateLabel=[[UILabel alloc] init]; _kDateLabel.textColor=CUSTOM_BLUE_COLOR; _kDateLabel.font=[UIFont systemFontOfSize:14]; _kDateLabel.textAlignment=NSTextAlignmentRight; } return _kDateLabel;}-(UIImageView *)kIconView{ if (_kIconView==nil) { _kIconView=[[UIImageView alloc] init]; _kIconView.contentMode=UIViewContentModeCenter; _kIconView.clipsToBounds=YES; } return _kIconView;}@endCustomModel
#import <Foundation/Foundation.h>@interface CustomModel : NSObject@property(nonatomic,copy) NSString *kTitle,*kImgName,*kContent,*kDataStr,*kAuthor;@end 0 0
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