iOS用SegmentController來切換tableView的時候 reloadData會造成資料重複建立 解決辦法

iOS用SegmentController來切換tableView的時候 reloadData會造成資料重複建立 解決辦法

把在Cell上面建立的控制項放在Cell==nil的判斷裡面，這樣，每次進來就會先判斷有沒有，就可以避免資料重複建立，導致視圖越蓋越厚

if (cell==nil) {

cell=[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:cellIDD];

self.inviteLabel=[[UILabelalloc]initWithFrame:CGRectMake(10,5,[UIScreenmainScreen].bounds.size.width-20,120)];

self.inviteLabel.numberOfLines=0;

self.inviteLabel.text=cell_info.title;

self.inviteLabel.textColor=LABEL_TEXTCOLOR;

int width=100;

int height=40;

self.button=[[UIButtonalloc]initWithFrame:CGRectMake([UIScreenmainScreen].bounds.size.width/2-width/2,120+10, width, height)];

self.button.backgroundColor=[UIColorredColor];

[self.buttonsetBackgroundImage:[UIImageimageNamed:cell_info.cp]forState:UIControlStateNormal];

NSLog(@"cell_info.cp:%@",cell_info.cp);

//增加長按手勢

UILongPressGestureRecognizer *longPress=[[UILongPressGestureRecognizeralloc]initWithTarget:selfaction:@selector(longPress:)];

[self.inviteLabeladdGestureRecognizer:longPress];

longPress.minimumPressDuration=1.0;

[cell.contentViewaddSubview:self.button];

[cell.contentViewaddSubview:self.inviteLabel];

cell.backgroundColor=CELL_BACK_COLOR;

}