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