学习IOS两个月，看无线互联的视频和一些东拼西凑的博客，基础没有打好，学习的条理不清晰。还是通过东拼西凑的方式做了一个界面很简单的ToDoList应用，用到一些很基础的知识来实现安排计划、标记完成和取消标记、删除这些十分简单的功能（功能简单到还没有中文输入）。
如上图所示，在textfield框中输入你的计划，点击“Go！”，计划就会在下方列表中显示，当点击列表中每行右端的小方格或者选中每一行，就会标记计划，再次点击取消标记，标记标志为方格中的对勾图形。
将已经显示的计划选中向左方滑动，出现删除选项，点击删除。这么一个简单的东西，而且还缺少了很多必须要完善的功能，我还是折腾了四五天才勉强做出来，让我深刻地体会到“盲人摸象”和“磨刀不误砍柴工”，还是回去把OC基础语法的视频再过一遍。
在这个程序的编写中，我初步（但是还没有完全）形成mvc模式，传输数据在命名为Task的类中定义：//Task.h
#import <Foundation/Foundation.h>
@interface Task : NSObject
@property (nonatomic, strong) NSString *content;//输入的计划内容
@property (nonatomic, assign) BOOL isMark;//标记标志量
@property (nonatomic, strong) NSString *date;//计划建立时间
@end//Task.m
#import "Task.h"
@implementation Task
- (id)init
{
self = [super init];
if (self) {
NSDate *today = [NSDate date];
NSDateFormatter *formate = [[NSDateFormatter alloc]init];
[formate setDateFormat:@"hh:mm"];//取出当前时间
// [formate setDateFormat:@"yyyy-MM-dd hh:mm:ss"];
_date = [formate stringFromDate:today];
}
return self;
}
@end输入需要的控件在inputTask类中定义：
//imputTask.h
#import <UIKit/UIKit.h>
@interface InputTask : UIView<UITextFieldDelegate>
@property (nonatomic, strong) UITextField *inputText;//输入框
@property (nonatomic, strong) UIButton *button;//按钮“Go!”
@end#import "RootViewController.h"
#import "InputTask.h"
@implementation InputTask
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:(CGRect)frame];
if (self) {
_inputText = [[UITextField alloc] initWithFrame:CGRectMake(60, 30, 200, 35)];
_inputText.delegate = self; // 设置代理
_inputText.textColor = [UIColor greenColor];
_inputText.placeholder = @"input";
_inputText.adjustsFontSizeToFitWidth = YES;
_inputText.clearsOnBeginEditing = YES;
_inputText.clearButtonMode = UITextFieldViewModeWhileEditing;
_inputText.borderStyle = UITextBorderStyleRoundedRect;
self.userInteractionEnabled = YES;
// [_inputText.window makeKeyAndVisible];
_button = [UIButton buttonWithType:UIButtonTypeCustom];
_button.frame = CGRectMake(265, 30, 50, 35);
// [_button addTarget:self action:@selector() forControlEvents:UIControlEventTouchUpInside];
[_button setTitle:@"Go!" forState:UIControlStateNormal];
[_button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[_button setTitleColor:[UIColor blueColor] forState:UIControlStateHighlighted];
[_button sizeToFit];
[self addSubview:_inputText];
[self addSubview:_button];
}
return self;
}
#pragma mark - textField Delegate
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
NSLog(@"textFieldShouldBeginEditing");
[textField.window makeKeyAndVisible];
return YES; // [textField becomeFirstResponder];
}
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
if (!textField.window.isKeyWindow)
{
[textField.window makeKeyAndVisible];
}
NSLog(@"textFieldDidBeginEditing");
}
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
NSLog(@"textFieldShouldEndEditing");
return YES; // [tf resignFirstResponder];
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
NSLog(@"textFieldDidEndEditing : %@", textField.text);
}
- (BOOL)textField:(UITextField *)textField
shouldChangeCharactersInRange:(NSRange)range
replacementString:(NSString *)string
{
NSLog(@"shouldChangeCharactersInRange : %@", string);
NSLog(@"%@", textField.text);
return YES;
}
- (BOOL)textFieldShouldClear:(UITextField *)textField
{
NSLog(@"textFieldShouldClear");
return YES;
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
[textField resignFirstResponder];
return YES;
}
@end列表在RootViewController中实现：
//RootViewController.h
#import <UIKit/UIKit.h>
@interface RootViewController : UIViewController <UITableViewDataSource,UITableViewDelegate>
@end#import "RootViewController.h"
#import "TaskCell.h"
#import "Task.h"
#import "InputTask.h"
@interface RootViewController ()
{
UITableView *_tableView;
NSMutableArray *_taskList;
InputTask *_inputTask;
// UITextField *_tf;
// UIButton *_button;
}
@end
@implementation RootViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)loadView
{
UIView *view = [[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];
self.view = view;
_tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 70, 320, kDeviceHeight-70) style:UITableViewStylePlain];
_tableView.dataSource = self;
_tableView.delegate = self;
_tableView.rowHeight = 60;
_inputTask = [[InputTask alloc] initWithFrame:CGRectMake(0, 0, kDeviceWidth, 65)];
[_inputTask.button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:_inputTask];
// [self.view addSubview:_button];
[self.view addSubview:_tableView];
}
- (void)buttonAction:(id)sender
{
// NSLog(@"%@", _tf.text);
Task *task = [[Task alloc] init];
// task.date = @"今天";
task.content = _inputTask.inputText.text;
// task.content = _tf.text;
[_taskList insertObject:task atIndex:0];
[_tableView reloadData];
_inputTask.inputText.text = @"";
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
_taskList = [[NSMutableArray alloc] initWithCapacity:20];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - TableView Datasource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;
{
return [_taskList count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentify = @"cell";
TaskCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentify];
Task *task = _taskList[indexPath.row];
if (cell == nil) {
cell = [[TaskCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentify];
}
cell.markButton.tag = indexPath.row;
cell.buttonClick = ^() {
task.isMark = !task.isMark;
[_tableView reloadData];
};
cell.date.text = task.date;
cell.markButton.selected = task.isMark;
cell.textLabel.text = task.content;
/*
// UIButton *btn4 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
// btn4.frame = CGRectMake(270.0f, 0.0f, 50.0f, 40.0f);
// [btn4 setTitle:@"删除" forState:UIControlStateNormal];
// [btn4 addTarget:self action:@selector(test) forControlEvents:UIControlEventTouchUpInside];
// [cell addSubview:btn4];
*/
return cell;
}
- (void)test
{
// UITextField *tf = (UITextField *)[self.window viewWithTag:101];
// 将键盘移除
// [tf resignFirstResponder];
NSLog(@"hha");
}
//返回YES，表示支持单元格的移动
-(BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
//单元格返回的编辑风格，包括删除 添加 和 默认 和不可编辑三种风格
-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
return UITableViewCellEditingStyleDelete;
}
-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle==UITableViewCellEditingStyleDelete) {
// 获取选中删除行索引值
NSInteger row = [indexPath row];
// 通过获取的索引值删除数组中的值
[_taskList removeObjectAtIndex:row];
// 删除单元格的某一行时，在用动画效果实现删除过程
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cellView = [tableView cellForRowAtIndexPath:indexPath];
if (cellView.accessoryType == UITableViewCellAccessoryNone) {
// cellView.accessoryType=UITableViewCellAccessoryCheckmark;
// markButton.selected = !markButton.selected;
Task *task = _taskList[indexPath.row];
task.isMark = !task.isMark;
[tableView reloadData];
}
else {
cellView.accessoryType = UITableViewCellAccessoryNone;
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@endUITableView 的单元格cell 中包含了标记按钮和显示时间的UILable，在 TaskCell类中实现：
#import <UIKit/UIKit.h>
@interface TaskCell : UITableViewCell
@property (nonatomic, strong) UIButton *markButton;
@property (nonatomic, strong) UILabel *date;
@property (nonatomic, copy) void (^buttonClick)();
@end#import "TaskCell.h"
@implementation TaskCell
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
_markButton = [UIButton buttonWithType:
UIButtonTypeCustom];
_markButton.frame = CGRectMake(270, 0, 50, 50);
[_markButton setImage:[UIImage imageNamed:@"checkbox_priority"] forState:UIControlStateNormal];
[_markButton setImage:[UIImage imageNamed:@"checkbox_checked"] forState:UIControlStateSelected];
[_markButton addTarget:self action:@selector(click:) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:_markButton];
_date = [[UILabel alloc] initWithFrame:CGRectMake(270, 40, 50, 20)];
[self addSubview:_date];
}
return self;
}
- (void)click:(id)sender {
if (_buttonClick) {
_buttonClick();
}
}
- (void)awakeFromNib {
// Initialization code
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
@end这个版本还有很多地方没完善，比如中文输入、响应键盘上的return、我没掌握的block语法（响应标记按钮事件）、没掌握http通信与后台传输数据、单元格动画、丑的不堪的界面等等。盲人摸象做事的效率低下，质量还很差，如果没有导师指导，恐怕要更长的时间才能完成。然而，这并没有完成，我会重新做一个新的版本，加上登陆界面，下一次题目就不能叫盲人摸象了，要做到柳暗花明。
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