popOver 弹出框简单使用

1.仿QQ弹出框

1.1用到的知识点

1.1.1如何调整弹出框的大小(这里弹出的也是控制器)

这里已经有讲解过http://blog.csdn.net/iostiannan/article/details/51131431

1.1.2如何使QQ弹出框的文字与弹出框Frame自适应

```
此方法,会返回一个由UIKit子类调用后得到的Size ,此size即是完美适应调用此方法的UIKit子类的size
得到此size后, 可以调用 调整弹框大小的方法 **preferredContentSize**配合使用
```//重置本控制器的大小
-(CGSize)preferredContentSize{
    if (self.popoverPresentationController != nil) {
        CGSize tempSize ;
        tempSize.height = self.view.frame.size.height;
        tempSize.width  = 155;
        CGSize size = [_tableVIew sizeThatFits:tempSize];  //返回一个完美适应tableView的大小的 size
        return size;
    }else{
        return [super preferredContentSize];
    }
}

代码如下

viewController.m

#import "ViewController.h"
#import "PopViewController.h"
@interface ViewController ()<UIPopoverPresentationControllerDelegate>
{
    PopViewController   *_popVC;
}
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.navigationItem.title = @"QQ";
    self.view.backgroundColor = [UIColor whiteColor];
    UIButton *btnR = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    btnR.frame = CGRectMake(0, 0, 50, 50);
    btnR.backgroundColor = [UIColor clearColor];
    [btnR setTitle:@"+" forState:UIControlStateNormal];
    [btnR addTarget:self action:@selector(popView) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *imte = [[UIBarButtonItem alloc] initWithCustomView:btnR];
    self.navigationItem.rightBarButtonItem = imte;
}
-(void)popView{
    _popVC = [[PopViewController alloc] init];
    _popVC.modalPresentationStyle = UIModalPresentationPopover;
    //设置依附的按钮
    _popVC.popoverPresentationController.barButtonItem = self.navigationItem.rightBarButtonItem;
    //可以指示小箭头颜色
    _popVC.popoverPresentationController.backgroundColor = [UIColor whiteColor];
    //content尺寸
    _popVC.preferredContentSize = CGSizeMake(400, 400);
    //pop方向
    _popVC.popoverPresentationController.permittedArrowDirections = UIPopoverArrowDirectionUp;
    //delegate
    _popVC.popoverPresentationController.delegate = self;
    [self presentViewController:_popVC animated:YES completion:nil];
}
//代理方法 ,点击即可dismiss掉每次init产生的PopViewController
-(UIModalPresentationStyle)adaptivePresentationStyleForPresentationController:(UIPresentationController *)controller{
    return UIModalPresentationNone;
}

---

弹出框类.m

<div class="se-preview-section-delimiter"></div>
#import "PopViewController.h"
@interface PopViewController ()<UITableViewDataSource,UITableViewDelegate>
{
    UITableView *_tableVIew;
    NSArray *_dataArray;
    NSArray *_arr1;
    NSArray *_arr2;
}
@end
@implementation PopViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor whiteColor];
    _arr1 = @[@"扫一扫",@"加好友",@"创建讨论组",@"发送到电脑",@"面对面快传",@"收钱"];
    _arr2 = @[@"right_menu_QR",@"right_menu_addFri",@"right_menu_multichat",@"right_menu_sendFile",@"right_menu_facetoface",@"right_menu_payMoney"];
    _tableVIew = [[UITableView alloc] initWithFrame:self.view.bounds];
    _tableVIew.delegate = self;
    _tableVIew.dataSource = self;
    _tableVIew.scrollEnabled = YES;
    _tableVIew.backgroundColor = [UIColor whiteColor];
    [self.view addSubview:_tableVIew];
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return _arr2.count;
}
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *str = @"cellID";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:str];
    if (!cell) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:str];
    }
    cell.textLabel.text = _arr1[indexPath.row];
    cell.imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@",_arr2[indexPath.row]]];
    return cell;
}
//重置本控制器的大小
-(CGSize)preferredContentSize{
    if (self.popoverPresentationController != nil) {
        CGSize tempSize ;
        tempSize.height = self.view.frame.size.height;
        tempSize.width  = 155;
        CGSize size = [_tableVIew sizeThatFits:tempSize];  //返回一个完美适应tableView的大小的 size
        return size;
    }else{
        return [super preferredContentSize];
    }
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/
@end

 
源码下载 ==>> GitHUb

pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation 
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { 
// Get the new view controller using [segue destinationViewController]. 
// Pass the selected object to the new view controller. 
} 
*/

@end 

 
GitHUb===>>https://github.com/tianNanYiHao/MyTestDemo.git