20141211笔记(UIImageView 设置内容的Mode的方法UICollectionViewCell Custom的方法ios modal segue code)

1、UIImageView 设置内容的Mode的方法
imageView.contentMode = UIViewContentModeScaleAspectFill;

2、UICollectionViewCell Custom的方法
CustomUICollectionViewCell.m

- (id)initWithFrame:(CGRect)frame{
    if (self = [super initWithFrame:frame]) {
        [self initUI];
    }
    return self;
}
- (void)initUI{ 
　　//TODO
}

然后在collectionView中注册这个CustomUICollectionViewCell

　　UICollectionViewFlowLayout* flowLayout = [[UICollectionViewFlowLayout alloc]init];
    collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:flowLayout];
    [collectionView setTranslatesAutoresizingMaskIntoConstraints:NO];
    [collectionView setBackgroundColor:[UIColor clearColor]];
    [collectionView registerClass:[CustomCollectionViewCell class] forCellWithReuseIdentifier:@"MY_CELL"];
    collectionView.dataSource = self;
    collectionView.delegate = self;

最后在datasource函数中复用Cell

- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    CustomCollectionViewCell *cell = [cv dequeueReusableCellWithReuseIdentifier:@"MY_CELL" forIndexPath:indexPath];
    
    return cell;
}

这就是CollectionViewCell的Custom流程

3、ios modal segue code

- (IBAction)pushMyNewViewController
{
    MyNewViewController *myNewVC = [[MyNewViewController alloc] init];

    // do any setup you need for myNewVC

    [self presentModalViewController:myNewVC animated:YES];//被弃用

　　　　[self presentViewController:viewController animated:YES completion:nil];//被这个代替

}

[self dismissViewControllerAnimated:YES completion:nil];  //dismiss view