图片相关 UIActionSheet

ViewController.m

#import "ViewController.h"#import "UIImageView+WebCache.h"#import "UIImage+GIF.h"@interface ViewController ()<UIActionSheetDelegate,UINavigationControllerDelegate,UIImagePickerControllerDelegate>@property(nonatomic,retain)UIImageView *myImage;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        self.myImage=[[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 200, 200)];    self.myImage.backgroundColor=[UIColor yellowColor];    [self.view addSubview:self.myImage];    [_myImage release];    [self.myImage sd_setImageWithURL:[NSURL URLWithString:@"http://v.juhe.cn/movie/picurl?2583246"]];    // 创建一个UIActionSheet    UIActionSheet *sheet=[[UIActionSheet alloc]initWithTitle:@"选择图像" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"从相册选取", nil];    [sheet showInView:self.view];    self.myImage.userInteractionEnabled=YES;    UILongPressGestureRecognizer *longPress=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];    [self.myImage addGestureRecognizer:longPress];    [longPress release];   }-(void)longPressAction:(UILongPressGestureRecognizer *)longPress{    NSLog(@"%@",@"lalala");   // 判断手势当前的状态,只有刚开始会保存图片    if (longPress.state==UIGestureRecognizerStateBegan) {        // 把图片写到本地相册中        UIImageWriteToSavedPhotosAlbum(self.myImage.image, nil, nil, nil);    }}-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{    NSLog(@"%ld",buttonIndex);    if (buttonIndex==0) {        UIImagePickerController *picker=[[UIImagePickerController alloc]init];        // 设置代理人        // 这个地方很特殊,这个代理人执行两套协议,需要签订两个协议        picker.delegate=self;        // 允许进行编辑        picker.allowsEditing=YES;        // 用模态让他显示出来        [self presentViewController:picker animated:YES completion:^{        }];            }    }#pragma mark 点击choose之后,可以选中当前的图片,并且返回让图片显示在imageView上-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{    // 隐藏的效果就取消了,所以,我们需要手动添加dismiss的方法,让相册消失        [self dismissViewControllerAnimated:YES completion:^{        }];        NSLog(@"%@",info);    // 从返回过来的字典对象info中提取image    UIImage *image=info[UIImagePickerControllerOriginalImage];    self.myImage.image=image;   }