ELCImagePicker 学习总结(二)

来源：互联网发布：蓝牙4.0软件编辑：程序博客网时间：2024/05/16 17:30

头文件

#import <UIKit/UIKit.h>
#import <AssetsLibrary/AssetsLibrary.h>

@interface MyImagePickerViewController : UIViewController<UITableViewDataSource, UITableViewDelegate>
{
IBOutlet UITableView *tableView;
UIActivityIndicatorView *activity;
}
@property (nonatomic, retain) IBOutlet UITableView *tableView;
@property (nonatomic, retain) IBOutlet UIActivityIndicatorView *activity;

@end

源文件

//
// MyImagePickerViewController.m
// MyImagePicker
//
// Created by lisa liu on 4/14/15.
// Copyright (c) 2015 lisa liu. All rights reserved.
//

#import "MyImagePickerViewController.h"

@interface MyImagePickerViewController ()

@property (nonatomic) NSMutableArray *assets;
@property (nonatomic, strong)ALAssetsLibrary* library;

@end

@implementation MyImagePickerViewController

@synthesize tableView;
@synthesize activity;
@synthesize assets;

- (void)viewDidLoad {
    [super viewDidLoad];
    self.tableView.delegate = self;
    self.tableView.dataSource = self;

    [self.activity startAnimating];

    //Define Blocks Here

    void (^assetEnumerator) (ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger index, BOOL *stop){

        if (result != nil) {

            NSLog(@"See Asset:%@", result);
            [self.assets addObject:result];
        }
    };


    void (^assetGroupEnumerator) ( ALAssetsGroup *, BOOL *) = ^( ALAssetsGroup *group, BOOL *stop){

        if (group != nil) {
            [group enumerateAssetsUsingBlock:assetEnumerator];
        }
        [self.tableView reloadData];
        [self.activity stopAnimating];
        [self.activity setHidden:YES];
    };
    self.assets = [[NSMutableArray alloc]init];
    ALAssetsLibrary *libraryL = [[ALAssetsLibrary alloc]init];
    self.library = libraryL;
    [self.library enumerateGroupsWithTypes:ALAssetsGroupAll
                           usingBlock:assetGroupEnumerator
                           failureBlock:^(NSError *error){
         NSLog(@"A problem occured");
     }];

}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{

    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

    return [assets count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {

        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];

    }
    ALAsset *asset = [assets objectAtIndex:indexPath.row];
    [cell.imageView setImage:[UIImage imageWithCGImage:[asset thumbnail]]];
    [cell.textLabel setText:[NSString stringWithFormat:@"Photo %d", indexPath.row + 1]];
    return cell;
}

/*
#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

0 0