iOS deep Learning: (UITableView series 3:insertrow)

In the previous blog, I used reloaddata to refresh the interface, but there is no animation effect, then I here through the Insertrowsatindexpaths:withrowanimation set animation effect, I hope to help you. Or in the previous code base to fine-tuning, click on the right side of the Barbuttonitem add element, this time I need to add to the _infoarray data source elements are sequentially inserted, instead of adding at the end, which requires the algorithm to sort, the key code is as follows,

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@interface  RootViewController ()<UITableViewDelegate,UITableViewDataSource>{    //_infoArray是TableView的数据源    NSMutableArray *_infoArray;    //随机添加的数字都来自_numberArray    NSMutableArray *_numberArray;}- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view from its nib.    //设置导航栏右侧的按钮，并绑定点击事件    UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithTitle:@"Add"style:UIBarButtonItemStylePlain target:self action:@selector(addNumber)];    self.navigationItem.rightBarButtonItem = rightItem;    //初始化_numberArray，并且将0~99数字转换成NSNumber，然后加入数组    _numberArray = [[NSMutableArray alloc] initWithCapacity:3];    for(inti = 0;i < 100;i++)    {        NSNumber *tempNumber = [NSNumber numberWithInt:i];        [_numberArray addObject:tempNumber];    }    //初始化数据源数组_infoArray    NSNumber *num0 = [NSNumber numberWithInt:1];    NSNumber *num1 = [NSNumber numberWithInt:30];    NSNumber *num2 = [NSNumber numberWithInt:47];    NSNumber *num3 = [NSNumber numberWithInt:68];    NSNumber *num4 = [NSNumber numberWithInt:75];    NSNumber *num5 = [NSNumber numberWithInt:88];    _infoArray = [[NSMutableArray alloc] initWithObjects:num0,num1,num2,num3,num4,num5, nil];}

Here I initialized the data source _infoarray, where the contents of {1,30,47,68,75,88} digital content, click on the right side of the navigation bar Add button, to the data source in order to insert elements, its binding Addnumber method is as follows,

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- (void)addNumber{    int count = (int)[_numberArray count];    //0~count随机数    intrandomIndex = rand()%count;    //随机从_numberArray中获取一个元素insertNumber    NSNumber *insertNumber = [_numberArray objectAtIndex:randomIndex];    intindex = 0;    for(NSNumber *tempNumber in _infoArray) {        //将要插入的元素与数据源_infoArray中的元素进行大小比较        intinsertInt = [insertNumber intValue];        intexistInt = [tempNumber intValue];        //因为数据源是顺序排列的，所以如果要插入的数字小于_infoArray数据源中的某个值时候则插入数字        //index是用于记录要插入的位置的        if(insertInt<=existInt) {            [_infoArray insertObject:insertNumber atIndex:index];            NSMutableArray *indexPaths = [[NSMutableArray alloc] init];            NSIndexPath *indexPath = [NSIndexPath indexPathForRow:index inSection:0];            [indexPaths addObject:indexPath];            [self performSelectorOnMainThread:@selector(insertTableViewRow:) withObject:indexPaths waitUntilDone:YES];            //这里是到主线程中刷新界面，因为现在就是在主线程，所以这段话有点多此一举，可以直接调用下面的代码            //[self insertTableViewRow:indexPaths];                        //为什么需要一个break语句呢？因为如果不通过break停止for循环，则会出现插入错误。            break;        }        index++;    }    //为了不重复插入_numberArray中的数据，则要将已经插_infoArray数据源中的数据从原来的数组中删除    [_numberArray removeObject:insertNumber];}

The method above is to insert a new element sequentially, and also to insert a new row in the corresponding number of thetableview rows, insert the row in the main thread by Performselectoronmainthread code, The corresponding-inserttableviewrow method is shown below,

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- (void)insertTableViewRow:(NSMutableArray *)indexPaths{    [self.theTableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationAutomatic];    //UITableViewRowAnimationFade是一种渐变淡出的效果，这个在删除行的时候使用比较好，这里使用UITableViewRowAnimationAutomatic动画效果比较好}

In this way, I add new elements, update the interface, there is the setting of the uitableviewrowanimationautomatic or Uitableviewrowanimationfade gradient animation effect.

iOS deep Learning: (UITableView series 3:insertrow)