Easy Point, which I independently developed, is an app that serves the financial knowledge learning of college students. Logical complex interface, which is the interface to solve the problem, a radio, multiple choice, true or false, short-answer questions, etc., similar to the demo, very few, I also consulted some, learned a lot of experience, write down is worth sharing, this project the first function is relatively simple, so I still use the MVC architecture, we first look at the effect, as shown below:
A brief description of the interface hierarchy implemented: In ViewController, the main ones are: Self. View-> UICollectionView->UITableView of course, there’s UIImageView, UIProgressView, UIButton, those are secondary. First, I used xiB to customize the cell option and created HomePowerExamModel, as shown in the figure below:
Create 3 TableViews, I call them: HomeBaseExamTV, HomeSingleTV, HomeMultiTV, let the next two inherit from the first, let’s look at HomeBaseExamTV code:
#import <UIKit/UIKit.h>@class HomePowerExamModel; @interface HomeBaseExamTV : UITableView<UITableViewDataSource,UITableViewDelegate> @property (nonatomic, strong) HomePowerExamModel * ExModel; @property(nonatomic,strong) NSArray *answerList; @property(nonatomic,strong) NSArray *questionList; @property(nonatomic,copy) NSDictionary *answer; // The default selected answer @property (nonatomic,copy) NSString *tempAnswer; */ - (void)config:(HomePowerExamModel *)model index:(NSInteger)index; @endCopy the code#import "HomeBaseExamTV.h"
#import "HomePowerExamModel.h"
@interface HomeBaseExamTV()
@end
@implementation HomeBaseExamTV
- (NSArray *)answerList{
if(! _answerList) { _answerList = @[@"A"The @"B"The @"C"The @"D"The @"E"];
}
return _answerList;
}
- (NSArray *)questionList{
if(! _questionList) { _questionList = @[NONullString(_ExModel.QB_A),NONullString(_ExModel.QB_B),NONullString(_ExModel.QB_C),NONullString(_ExModel.QB_D),NONull String(_ExModel.QB_E)]; }return _questionList;
}
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.separatorStyle = UITableViewCellSeparatorStyleNone;
}
returnself; } - (void)config:(HomePowerExamModel *)model index:(NSInteger)index { self.ExModel = model; UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.width, 0)]; UILabel * titleLb; /* Title text */if (iphoneSE) {
titleLb = [[UILabel alloc] initWithFrame:CGRectMake(10, 20, self.width-15, 0)];
} else if (iphone7)
{
titleLb = [[UILabel alloc] initWithFrame:CGRectMake(10, 25, self.width-15, 0)];
} else
{
titleLb = [[UILabel alloc] initWithFrame:CGRectMake(10, 35, self.width-20, 0)];
}
titleLb.numberOfLines = 0;
titleLb.text = [NSString stringWithFormat:@"% lh-zd, % @",index+1,model.QB_Description];
if (iphoneSE) {
titleLb.font = [UIFont systemFontOfSize:14];
} else
{
titleLb.font = [UIFont systemFontOfSize:15];
}
[titleLb sizeToFit];
titleLb.textColor = [UIColor colorWithHexColorString:@"#3c4a55"Alpha: 1.0]; titleLb.textAlignment = NSTextAlignmentNatural; [headerView addSubview:titleLb]; headerView.height = titleLb.bottom + 10; self.tableHeaderView = headerView; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {return 0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
return nil;
}
Copy the codeNext look at the code of HomeSingleTV, because the judgment question is also a single choice, the difference is that the single choice has a maximum of 5 options, only two options, there is a background to return a type judgment question type, so share a tableView, as shown in the following code:
#import "HomeBaseExamTV.h"
@interface HomeSingleTV : HomeBaseExamTV
@end
Copy the code#import "HomeSingleTV.h"
#import "HomeSelectionCell.h"
#import "HomePowerExamModel.h"
@interface HomeSingleTV()<UITableViewDelegate,UITableViewDataSource>
@property (nonatomic, strong) HomePowerExamModel *model;
@property (nonatomic,strong) NSMutableDictionary *rowHeightDic;
@property(nonatomic,assign) NSInteger selected;
@end
@implementation HomeSingleTV
- (NSMutableDictionary *)rowHeightDic
{
if(! _rowHeightDic) { _rowHeightDic = [NSMutableDictionary dictionary]; }return _rowHeightDic;
}
- (NSDictionary *)answer{
if (self.selected != -1)
{
return@ {@"QuestionBID":@([self.model.QuestionBId intValue]),@"answer":self.answerList[_selected]};
} else
{
return@ {@"QuestionBID":@([self.model.QuestionBId intValue]),@"answer": @""};
}
}
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.selected = -1;
[self registerNib:[UINib nibWithNibName:@"HomeSelectionCell" bundle:nil] forCellReuseIdentifier:@"HomeSelectionCell"];
self.backgroundColor = [UIColor clearColor];
self.bounces = NO;
}
returnself; } - (void)config:(HomePowerExamModel *)model index:(NSInteger)index{ [super config:model index:index]; // Call the parent method to set the generic setting self.model = model; self.delegate = self; self.dataSource = self; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {if ([self.model.QB_Type isEqualToString:@"3"]) {
return 2;
}
else
{
return self.questionList.count;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
HomeSelectionCell * cell = [tableView dequeueReusableCellWithIdentifier:@"HomeSelectionCell"];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.contentLb.text = [NSString stringWithFormat:@"% @",self.questionList[indexPath.row]];
cell.contentLb.textColor = [UIColor colorWithHexColorString:@"# 666666"Alpha: 1.0]; cell.contentLb.font = [UIFont systemFontOfSize:14]; cell.backgroundColor = [UIColor clearColor]; NSArray * normalImgName = @[@"A1"The @"B1"The @"C1"The @"D1"The @"E1"];
NSArray * selectImgName = @[@"A2"The @"B2"The @"C2"The @"D2"The @"E2"];
[cell.selectBtn setImage:ImageNamed(normalImgName[indexPath.row]) forState:UIControlStateNormal];
[cell.selectBtn setImage:ImageNamed(selectImgName[indexPath.row]) forState:UIControlStateSelected];
if ([cell.contentLb.text isEqualToString:@""]) {
cell.selectBtn.hidden = YES;
} else
{
cell.selectBtn.hidden = NO;
}
cell.backgroundColor = [UIColor clearColor];
if (indexPath.row == self.selected)
{
cell.selectBtn.selected = YES;
} else
{
cell.selectBtn.selected = NO;
}
cell.selectBtn.tag = indexPath.row;
[cell.selectBtn addTarget:self action:@selector(selectBtnClick:) forControlEvents:UIControlEventTouchUpInside];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
CGFloat height = [self getHeightWithStr:cell.contentLb.text];
if (iphoneSE)
{
cell.bgView.frame = CGRectMake(0, 0, 270, height);
cell.selectBtn.frame = CGRectMake(10, 2, 55, height);
cell.contentLb.frame = CGRectMake(50, 2, 225, height);
}
else if (iphone7)
{
cell.bgView.frame = CGRectMake(0, 0, 275, height);
cell.selectBtn.frame = CGRectMake(10, 2, 55, height);
cell.contentLb.frame = CGRectMake(50, 2, 225, height);
}
else
{
cell.bgView.frame = CGRectMake(0, 0, 275, height);
cell.selectBtn.frame = CGRectMake(15, 2, 55, height);
cell.contentLb.frame = CGRectMake(50, 2, 225, height);
}
returncell; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { self.selected = indexPath.row; [self reloadData]; } /* dynamically calculates the cell height based on the returned option text length */ - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { NSNumber *number = [self.rowHeightDic objectForKey:@(indexPath.row).description];if (number) {
if (iphoneSE) {
return number.floatValue;
}
else
{
returnnumber.floatValue + 10; }}else{
CGFloat height = [self getHeightWithStr:self.questionList[indexPath.row]];
[self.rowHeightDic setValue:[NSNumber numberWithFloat:height] forKey:@(indexPath.row).description];
return height;
}
}
- (CGFloat)getHeightWithStr:(NSString *)str{
return[self calculateStringHeight:str width:SCREEN_WIDTH - 10 -18 -5 -10 fontSize:17] + 15; } // calculateStringHeight - (CGFloat)calculateStringHeight:(NSString *) STR width:(CGFloat)width fontSize:(CGFloat)size{return[str boundingRectWithSize:CGSizeMake(width, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:size]} context:nil].size.height; } /* Save the answer */ - (void)setTempAnswer:(NSString *)tempAnswer{
if (tempAnswer.length == 0)
return; _selected = [self.answerList indexOfObject:tempAnswer]; [self reloadData]; } /* select options */ - (void)selectBtnClick:(UIButton *) BTN {self.selected = btn.tag; [self reloadData]; } @endCopy the codeThe code of HomeMultiTV is followed by the code of HomeMultiTV. There are many combinations of multiple choice questions, so we need to do two kinds of processing: first, to do a quick sort of multiple choice answers, I am using an array to save the answers, so I do a quick sort of array; When there is no answer submitted, the option can be re – selected, through the button to achieve. The complete code is as follows:
#import "HomeBaseExamTV.h"
@interface HomeMultiTV : HomeBaseExamTV
@end
Copy the code#import "HomeMultiTV.h"
#import "HomeSelectionCell.h"
#import "HomePowerExamModel.h"
@interface HomeMultiTV ()<UITableViewDelegate,UITableViewDataSource>
@property (nonatomic,strong) NSMutableDictionary *rowHeightDic;
@property(nonatomic,strong) NSMutableArray *selectedArray;
@property (nonatomic, strong) NSArray * multiAnswerList;
@end
@implementation HomeMultiTV
- (NSMutableDictionary *)rowHeightDic{
if(! _rowHeightDic) { _rowHeightDic = [NSMutableDictionary dictionary]; }return _rowHeightDic;
}
- (NSArray *)multiAnswerList
{
if(! _multiAnswerList) { _multiAnswerList = @[@"A,"The @"B,"The @"C,"The @"D,"The @"E,"];
}
return_multiAnswerList; */ - (NSDictionary *)answer{NSString *answer = @"";
NSString *Answer = @""; Self.selectedarray sortUsingSelector:@selector(compare:)];for (NSNumber *number in self.selectedArray) {
Answer = [Answer stringByAppendingString:self.multiAnswerList[number.intValue]];
}
if (Answer.length > 0) {
answer = [Answer substringToIndex:[Answer length]-1];
}
if (answer.length>0)
{
return@ {@"QuestionBID":@([self.ExModel.QuestionBId intValue]),@"answer":answer};
} else
{
return@ {@"QuestionBID":@([self.ExModel.QuestionBId intValue]),@"answer": @""};
}
}
- (NSMutableArray *)selectedArray{
if(! _selectedArray) { _selectedArray = [NSMutableArray array]; }return _selectedArray;
}
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self registerNib:[UINib nibWithNibName:@"HomeSelectionCell" bundle:nil] forCellReuseIdentifier:@"HomeSelectionCell"];
self.backgroundColor = [UIColor clearColor];
self.bounces = NO;
}
returnself; } - (void)config:(HomePowerExamModel *)model index:(int)index { [super config:model index:index]; self.delegate = self; self.dataSource = self; } /* Save the answer */ - (void)setTempAnswer:(NSString *)tempAnswer{
if (tempAnswer.length == 0)
return;
for(int i =0; i < [tempAnswer length]; i++)
{
NSString *str = [tempAnswer substringWithRange:NSMakeRange(i, 1)];
if(! [str isEqualToString:@","]) {
NSInteger index = [self.answerList indexOfObject:str];
if(! [self.selectedArray containsObject:@(index)]) { [self.selectedArray addObject:@(index)]; } } } [self reloadData]; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {return self.questionList.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
HomeSelectionCell * cell = [tableView dequeueReusableCellWithIdentifier:@"HomeSelectionCell"];
cell.contentLb.text = [NSString stringWithFormat:@"% @",self.questionList[indexPath.row]];
cell.contentLb.font = [UIFont systemFontOfSize:14];
cell.contentLb.textColor = [UIColor colorWithHexColorString:@"# 666666"Alpha: 1.0]; NSArray * normalImgName = @[@"A1"The @"B1"The @"C1"The @"D1"The @"E1"];
NSArray * selectImgName = @[@"A2"The @"B2"The @"C2"The @"D2"The @"E2"];
[cell.selectBtn setImage:ImageNamed(normalImgName[indexPath.row]) forState:UIControlStateNormal];
[cell.selectBtn setImage:ImageNamed(selectImgName[indexPath.row]) forState:UIControlStateSelected];
if ([cell.contentLb.text isEqualToString:@""]) {
cell.selectBtn.hidden = YES;
}
else
{
cell.selectBtn.hidden = NO;
}
if ([self.selectedArray containsObject:@(indexPath.row)])
{
cell.selectBtn.selected = YES;
} else
{
cell.selectBtn.selected = NO;
}
cell.backgroundColor = [UIColor clearColor];
cell.selectBtn.tag = indexPath.row;
[cell.selectBtn addTarget:self action:@selector(selectBtnClick:) forControlEvents:UIControlEventTouchUpInside];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
CGFloat height = [self _getHeightWithStr:cell.contentLb.text];
if (iphoneSE)
{
cell.bgView.frame = CGRectMake(0, 0, 270, height);
cell.selectBtn.frame = CGRectMake(10, 2, 55, height);
cell.contentLb.frame = CGRectMake(50, 2, 225, height);
}
else if (iphone7)
{
cell.bgView.frame = CGRectMake(0, 0, 275, height);
cell.selectBtn.frame = CGRectMake(10, 2, 55, height);
cell.contentLb.frame = CGRectMake(50, 2, 225, height);
}
else
{
cell.bgView.frame = CGRectMake(0, 0, 275, height);
cell.selectBtn.frame = CGRectMake(15, 2, 55, height);
cell.contentLb.frame = CGRectMake(50, 2, 225, height);
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([self.selectedArray containsObject:@(indexPath.row)]) {
[self.selectedArray removeObject:@(indexPath.row)];
}else{ [self.selectedArray addObject:@(indexPath.row)]; } [self reloadData]; } /* dynamic calculation height */ - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{NSNumber *number = [self.rowHeightDic objectForKey:@(indexPath.row).description];if (number)
{
if (iphoneSE) {
return number.floatValue;
}
else
{
returnnumber.floatValue + 10; }}else{
CGFloat height = [self _getHeightWithStr:self.questionList[indexPath.row]];
[self.rowHeightDic setValue:
[NSNumber numberWithFloat:height] forKey:@(indexPath.row).description];
return height;
}
}
- (CGFloat)_getHeightWithStr:(NSString *)str{
return[self calculateStringHeight:str width:SCREEN_WIDTH - 10 -18 -5 -10 fontSize:17] + 15; } // calculateStringHeight - (CGFloat)calculateStringHeight:(NSString *) STR width:(CGFloat)width fontSize:(CGFloat)size{return [str boundingRectWithSize:CGSizeMake(width, CGFLOAT_MAX) options:
NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
attributes:
@{NSFontAttributeName:[UIFont systemFontOfSize:size]} context:nil].size.height;
}
- (void)selectBtnClick:(UIButton *)btn
{
if ([self.selectedArray containsObject:@(btn.tag)]) {
[self.selectedArray removeObject:@(btn.tag)];
}
else
{
[self.selectedArray addObject:@(btn.tag)];
}
[self reloadData];
}
Copy the codeThe model and View code has been implemented. Finally, let’s look at the main code implementation in the Controller. First, create the CollectionView:
- (void)setupCollectionView
{
UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc]init];
flowLayout.sectionInset = UIEdgeInsetsMake(0, 0, 0, 0);
flowLayout.minimumInteritemSpacing = 0;
flowLayout.minimumLineSpacing = 0;
if (iphoneSE) {
flowLayout.itemSize = CGSizeMake(260, SCREEN_HEIGHT-64);
}
else if (iphone7)
{
flowLayout.itemSize = CGSizeMake(306, SCREEN_HEIGHT-64);
} else{ flowLayout.itemSize = CGSizeMake(337, SCREEN_HEIGHT-64); } // Determine the horizontal slide directionsetScrollDirection:UICollectionViewScrollDirectionHorizontal];
if (iphoneSE) {
self.collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 64, 260, SCREEN_HEIGHT-150) collectionViewLayout:flowLayout];
self.collectionView.center = CGPointMake(SCREEN_WIDTH/2, SCREEN_HEIGHT/2);
} else if (iphone7)
{
self.collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 64, 306, SCREEN_HEIGHT-180) collectionViewLayout:flowLayout];
self.collectionView.center = CGPointMake(SCREEN_WIDTH/2, SCREEN_HEIGHT/2);
} else
{
self.collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 64, 337, SCREEN_HEIGHT-200) collectionViewLayout:flowLayout];
self.collectionView.center = CGPointMake(SCREEN_WIDTH/2, SCREEN_HEIGHT/2);
}
self.collectionView.delegate = self;
self.collectionView.dataSource = self;
self.collectionView.pagingEnabled = YES;
self.collectionView.scrollEnabled = NO;
self.collectionView.showsHorizontalScrollIndicator = NO;
self.collectionView.showsVerticalScrollIndicator = NO;
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"UICollectionViewCell"]; self.collectionView.backgroundColor = [UIColor clearColor]; [self.view addSubview:self.collectionView]; / / was first called the self. CollectionView. ContentOffset = CGPointMake (self. CurrentIndex * SCREEN_WIDTH, 0); }Copy the codeNext, implement the proxy method and data source method of the CollectionView:
#pragma mark -- UICollectionViewDataSource,UICollectionViewDelegateFlowLayout
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return self.dataSource.count;
}
- (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"UICollectionViewCell" forIndexPath:indexPath]; [cell.contentView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)]; self.ExamModel = self.dataSource[indexPath.row]; HomeBaseExamTV * baseTv = nil; // 3if ([self.ExamModel.QB_Type isEqualToString:@"1"])
{
baseTv = [[HomeSingleTV alloc] initWithFrame:CGRectZero];
self.topicTypeLb.text = @"Multiple choice";
}
else if ([self.ExamModel.QB_Type isEqualToString:@"2"])
{
baseTv = [[HomeMultiTV alloc] initWithFrame:CGRectZero];
self.topicTypeLb.text = @"Multiple choice";
}
else if ([self.ExamModel.QB_Type isEqualToString:@"3"])
{
baseTv = [[HomeSingleTV alloc] initWithFrame:CGRectZero];
self.topicTypeLb.text = @"True or false";
}
if (iphoneSE) {
baseTv.frame = CGRectMake(0, 140, 250, self.collectionView.height-64);
} else if (iphone7)
{
baseTv.frame = CGRectMake(0, 170, 306, self.collectionView.height-64);
} else{ baseTv.frame = CGRectMake(0, 170, 337, self.collectionView.height-64); } [cell.contentView addSubview:baseTv]; /*1 means we did it. Look at the problem */if(self.doneType == 1)
{
[baseTv config:self.ExamModel index:indexPath.item];
baseTv.tempAnswer = self.ExamModel.userAnswer;
} else
{
[baseTv config:self.ExamModel index:indexPath.item];
baseTv.tempAnswer = self.ExamModel.userAnswer;
}
return cell;
}
Copy the codeSince the question making interface can return to the previous question, it is necessary to save the answer to the current question, using the following methods:
/* Save the answer */ - (void)setTempAnswer:(NSString *)tempAnswer{
if (tempAnswer.length == 0)
return; _selected = [self.answerList indexOfObject:tempAnswer]; [self reloadData]; } // multiple choice /* save the answer */ - (void)setTempAnswer:(NSString *)tempAnswer{
if (tempAnswer.length == 0)
return;
for(int i =0; i < [tempAnswer length]; i++)
{
NSString *str = [tempAnswer substringWithRange:NSMakeRange(i, 1)];
if(! [str isEqualToString:@","]) {
NSInteger index = [self.answerList indexOfObject:str];
if(! [self.selectedArray containsObject:@(index)]) { [self.selectedArray addObject:@(index)]; } } } [self reloadData]; }Copy the codeHere, do the interface is completed, the rest is some logical details of the processing of functions, there are several functions to achieve, I also write down to share, are the most simple and direct way, can be directly used. First, time minute second timing.
- (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; [self regularTime]; } - (void)regularTime { __weak typeof(self)weakSelf = self; /* Seconds */ secondValue = 0; The timer = [NSTimer timerWithTimeInterval: 1.0 f block: ^ {[weakSelf timerAction];} repeats: YES]; NSString *str_hour = [NSString stringWithFormat:@"%02d",secondValue/3600];//时
NSString *str_minute = [NSString stringWithFormat:@"%02d",(secondValue%3600)/60]; NSString *str_second = [NSString stringWithFormat:@"%02d",secondValue%60]; // second NSString *format_time = [NSString stringWithFormat:@"% @ : % @ : % @",str_hour,str_minute,str_second];
NSLog(@"time:%@",format_time);
[[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode]; } - (void)timerAction {/* secondValue++; NSString *str_hour = [NSString stringWithFormat:@"%02d",secondValue/3600];
NSString *str_minute = [NSString stringWithFormat:@"%02d",(secondValue%3600)/60];
NSString *str_second = [NSString stringWithFormat:@"%02d",secondValue%60];
NSString *format_time = [NSString stringWithFormat:@"% @ : % @ : % @",str_hour,str_minute,str_second];
self.currentTimeLb.text = [NSString stringWithFormat:@"% @",format_time];
}
- (void)dealloc
{
NSLog(@"%s",__func__);
}
Copy the code** Second, prevent violence click. ** click “Confirm” button to submit the answer, in order to prevent users from violent clicking, so click interval less than 1 second, invalid.
- (IBAction)submitBtnClick:(UIButton *)btn
{
DLog(@" %s ",__FUNCTION__); [[self class] cancelPreviousPerformRequestsWithTarget:self selector:@selector(handleEvent:) object:btn]; [the self performSelector: @ the selector (handleEvent) withObject: BTN afterDelay: 1.0]; } - (void)handleEvent:(UIButton *)btn {}Copy the code** Third, get the answer to the current question. ** When I click ok to submit, SAVE the answer to the current question and then slide to the next question. When I slide back to the previous question, I can still show the answer to the previous question. Self. currentIndex is the page number of the current question.
#pragma mark - scrollViewDelegate- (void)scrollViewDidScroll:(UIScrollView *)scrollView { NSInteger index = (scrollView. ContentOffset. X + scrollView. Frame. The size, width * 0.5)/scrollView frame. The size. The width;if(index ! = self. CurrentIndex | | index = = self. DefautIndex) {/ / page changed / / here is set to 1 for the index = = self. The self defautIndex failure. DefautIndex = - 1; [self updateAnswers]; self.currentIndex = index; DLog(@"index:%zd",index); }}#pragma mark updates the temporary answers
- (void)updateAnswers{
for (UICollectionViewCell *cell in [self.collectionView visibleCells]) {
HomeBaseExamTV *tableView = cell.contentView.subviews[0];
[self.dataSource enumerateObjectsWithOptions:NSEnumerationReverse usingBlock:^(HomePowerExamModel *model, NSUInteger idx, BOOL * _Nonnull stop) {
if (model.QuestionBId == [NSString stringWithFormat:@"% @",tableView.answer[@"QuestionBID"]] ) {
model.userAnswer = tableView.answer[@"answer"];
if ([model.QB_Type isEqualToString:@"3"] && ![model.userAnswer isEqualToString:@""]) {
if ([model.userAnswer isEqualToString:@"A"]) {
model.userAnswer = @"To";
} else
{
model.userAnswer = @"Wrong";
}
}
DLog(@"Answer: %@",model.userAnswer);
if (self.currentIndex == self.dataSource.count-1)
{
[self submitData:model.userAnswer Type:@"1"];
} else
{
[self submitData:model.userAnswer Type:@"0"]; }}}]; }}Copy the code- (NSDictionary *)answer{if (self.selected != -1)
{
return@ {@"QuestionBID":@([self.model.QuestionBId intValue]),@"answer":self.answerList[_selected]};
} else
{
return@ {@"QuestionBID":@([self.model.QuestionBId intValue]),@"answer": @""}; (NSDictionary *)answer{NSString *answer = @"";
NSString *Answer = @""; Self.selectedarray sortUsingSelector:@selector(compare:)];for (NSNumber *number in self.selectedArray) {
Answer = [Answer stringByAppendingString:self.multiAnswerList[number.intValue]];
}
if (Answer.length > 0) {
answer = [Answer substringToIndex:[Answer length]-1];
}
if (answer.length>0)
{
return@ {@"QuestionBID":@([self.ExModel.QuestionBId intValue]),@"answer":answer};
} else
{
return@ {@"QuestionBID":@([self.ExModel.QuestionBId intValue]),@"answer": @""}; }}Copy the codeconclusion
App project business development, more is involved interactive logic design, there will be a lot of details, these are the experience, the app developers, in the process of implementation will have a lot of bugs, but stepping over is the experience of ascension, record, in addition to share, is also for your review, hope you can improve, come on together.