IOS学习笔记（11）TableView中移动cell和section
在TableView中移动cell和section
用tableView的moveSection:toSection:方法把一个Section移动到新位置。也可以使用moveRowAtIndexIndexPath:toIndexPath:方法把一个TableViewCell从当前位置移到一个新位置。
#import <UIKit/UIKit.h>
@interface ThirdViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>
@property(nonatomic,strong)UITableView *myTableView;
@property(nonatomic,strong)NSMutableArray *arrayOfSections;
@end
#import "ThirdViewController.h"
@interface ThirdViewController ()
@end
@implementation ThirdViewController
@synthesize myTableView,arrayOfSections;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self != nil) {
arrayOfSections = [[NSMutableArray alloc]init];
NSMutableArray *section1 = [self newSectionWithIndex:1 withCellCount:3];
NSMutableArray *section2 = [self newSectionWithIndex:2 withCellCount:3];
NSMutableArray *section3 = [self newSectionWithIndex:3 withCellCount:3];
[arrayOfSections addObject:section1];
[arrayOfSections addObject:section2];
[arrayOfSections addObject:section3];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"Third";
self.view.backgroundColor = [UIColor grayColor];
myTableView = [[UITableView alloc]initWithFrame:self.view.bounds style:UITableViewStyleGrouped];
myTableView.delegate = self;
myTableView.dataSource = self;
[self.view addSubview:myTableView];
//[self moveSection1ToSection3]; //移动section
//[self moveCellInSection1ToCell2InSection1]; //在一个section里面移动cell
[self moveCell2InSection1ToCell1InSection2];
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
NSUInteger result = 0;
if([tableView isEqual:myTableView]){
if ([arrayOfSections count]>section) {
NSMutableArray *sectionArray = [arrayOfSections objectAtIndex:section];
result = (NSInteger)[sectionArray count];
}
}
return result;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
NSUInteger result = 0;
if([tableView isEqual:myTableView]){
result = (NSUInteger)[self.arrayOfSections count];
}
return result;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *result = nil;
if([tableView isEqual:myTableView]){
static NSString *CellIdentifier = @"CellIdentifier";
if(result == nil){
result = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSMutableArray *sectionArray = [arrayOfSections objectAtIndex:indexPath.section];
result.textLabel.text = [sectionArray objectAtIndex:indexPath.row];
}
return result;
}
-(NSMutableArray *)newSectionWithIndex:(NSUInteger)paramIndex withCellCount:(NSUInteger)paramCellCount{
NSMutableArray *result = [[NSMutableArray alloc]init];
NSUInteger counter = 0;
for (counter; counter<paramCellCount; counter++) {
[result addObject:[[NSString alloc]initWithFormat:@"Section %lu Cell %lu",(unsigned long)paramIndex,(unsigned long)counter + 1]];
}
return result;
}
-(void)moveSection1ToSection3{
NSMutableArray *section1 = [arrayOfSections objectAtIndex:0];
[arrayOfSections removeObject:section1];
[arrayOfSections addObject:section1];
[myTableView moveSection:2 toSection:1];
}
-(void)moveCellInSection1ToCell2InSection1{
NSMutableArray *section1 = [arrayOfSections objectAtIndex:0];
NSString *cell1InSection1 = [section1 objectAtIndex:0];
[section1 removeObject:cell1InSection1];
[section1 insertObject:cell1InSection1 atIndex:1];
NSIndexPath *sourceIndexPath = [NSIndexPath indexPathForRow:0 inSection:0];
NSIndexPath *destinationIndexPath = [NSIndexPath indexPathForRow:1 inSection:0];
[myTableView moveRowAtIndexPath:sourceIndexPath toIndexPath:destinationIndexPath];
}
-(void)moveCell2InSection1ToCell1InSection2{
NSMutableArray *section1 = [arrayOfSections objectAtIndex:0];
NSMutableArray *section2 = [arrayOfSections objectAtIndex:1];
NSString *cell2InSection1 = [section1 objectAtIndex:1];
[section1 removeObject:cell2InSection1];
//NSString *cell1InSection2 = [section2 objectAtIndex:0];
//[section2 removeObject:cell1InSection2];
[section2 insertObject:cell2InSection1 atIndex:0];
NSIndexPath *sourceIndexPath = [NSIndexPath indexPathForRow:1 inSection:0];
NSIndexPath *destinationIndexPath = [NSIndexPath indexPathForRow:0 inSection:1];
[myTableView moveRowAtIndexPath:sourceIndexPath toIndexPath:destinationIndexPath];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end