IOS开发（28）UITableView之移动Section和Cell

1 前言

2 代码实例

#import <UIKit/UIKit.h>

@interface ZYViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>

@property(nonatomic,strong)UITableView *myTableView;
@property(nonatomic,strong)NSMutableArray *arrayOfSections;//数据源

@end

@synthesize myTableView;
@synthesize arrayOfSections;

//初始化数据源每个Cell的内容
-(NSMutableArray *)newSectionWithIndex:(NSUInteger)paramIndex withCellCount:(NSUInteger)paramCellCount{
NSMutableArray *result = [[NSMutableArray alloc]init];
NSUInteger counter = 0;
for (counter = 0; counter<paramCellCount; counter++) {
[result addObject:[[NSString alloc] initWithFormat:@"Section %lu Cell %lu",(unsigned long)paramIndex,(unsigned long)counter+1]];
}
return result;
}

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//初始化数据源
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];
myTableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStyleGrouped];
self.myTableView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
//添加代理
myTableView.delegate = self;
myTableView.dataSource = self;
//添加右按钮
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"MoveSection" style:UIBarButtonItemStylePlain target:self action:@selector(movewSection1ToSection3)];
//添加左按钮
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"MoveCell" style:UIBarButtonItemStylePlain target:self action:@selector(moveCell2InSectionToCellInSection2)];
[self.view addSubview:myTableView];

}
//Section行数
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
NSInteger result = 0;
if ([tableView isEqual:myTableView]) {
result = (NSInteger)[self.arrayOfSections count];
}
return result;
}
//每个Section中的Cell行数
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
NSInteger result = 0;
if ([tableView isEqual:myTableView]) {
if ([arrayOfSections count]>section) {
NSMutableArray *sectionArray = [self.arrayOfSections objectAtIndex:section];
result = (NSInteger)[sectionArray count];
}
}
return result;
}
//设置每行Cell的内容

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *result = nil;
if ([tableView isEqual:myTableView]) {
static NSString *CellIdentifier = @"CellIdentifier";
result = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSMutableArray *sectionArray = [self.arrayOfSections objectAtIndex:indexPath.section];
result.textLabel.text = [sectionArray objectAtIndex:indexPath.row];
return result;
}
//将第一个索引位置的Section移动放到最后一个位置
-(void)movewSection1ToSection3{
NSMutableArray *section1 = [self.arrayOfSections objectAtIndex:0];
[self.arrayOfSections removeObject:section1];
[self.arrayOfSections addObject:section1];

[myTableView moveSection:0 toSection:2];
}
//将第一个Section中的第一个Cell和第二个互换
-(void)moveCell1InSectionToCell2InSection1{
NSMutableArray *section1 = [self.arrayOfSections objectAtIndex:0];
NSString *cell1InSection1 = [section1 objectAtIndex:0];
[section1 removeObject:cell1InSection1];
[section1 insertObject:cell1InSection1 atIndex:1];
NSIndexPath *sourceIndexPath = [NSIndexPath indexPathForRow:0 inSection:0];
NSIndexPath *destinationIdexPath = [NSIndexPath indexPathForRow:1 inSection:0];
[self.myTableView moveRowAtIndexPath:sourceIndexPath toIndexPath:destinationIdexPath];
}
//将第一个Section的第二个Cell移动到第二个Section的第一个Cell之前的位置
-(void)moveCell2InSectionToCellInSection2{
NSMutableArray *section1 = [arrayOfSections objectAtIndex:0];
NSMutableArray *section2 = [arrayOfSections objectAtIndex:1];

NSString *cell2InSection1 = [section1 objectAtIndex:1];
[section1 removeObject:cell2InSection1];
[section2 insertObject:cell2InSection1 atIndex:0];

NSIndexPath *sourceIndexPath = [NSIndexPath indexPathForRow:1 inSection:0];
NSIndexPath *destinationIndexPath = [NSIndexPath indexPathForRow:0 inSection:1];

[myTableView moveRowAtIndexPath:sourceIndexPath toIndexPath:destinationIndexPath];
}

3 结语