ios 头像处理

//

//  HJDetilsViewController.m

//  MusicLove

//

//  Created by niuxinghua on 15/1/21.

//  Copyright (c) 2015年 Hjojo. All rights reserved.

//

#import "HJDetilsViewController.h"

#import <MobileCoreServices/MobileCoreServices.h>

#import <QuartzCore/QuartzCore.h>

@interface HJDetilsViewController ()

@end

@implementation HJDetilsViewController

- (void)viewDidLoad {

    [superviewDidLoad];

    CGFloat mainwith=[UIScreenmainScreen].bounds.size.width;

    CGFloat mainheight=[UIScreenmainScreen].bounds.size.height;

    // Do any additional setup after loading the view.

   // self.view.backgroundColor=[UIColor yellowColor];

    self.navigationItem.title=@"个人资料";

    UILabel* lable=[[UILabelalloc]initWithFrame:CGRectMake(5,64, mainwith/4, mainheight/8)];

    [lable setText:@"头像"];

    [lable setTextColor:[UIColorblackColor]];

    [self.viewaddSubview:lable];

    NSFileManager *fileManager = [NSFileManagerdefaultManager];

    NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);

    NSString *documentsDirectory = [pathsobjectAtIndex:0];

    NSString *imageFilePath = [documentsDirectorystringByAppendingPathComponent:@"avatar.jpg"];

   _avatar=[[UIButtonalloc]initWithFrame:CGRectMake(mainwith/4*3,64, mainwith/4, mainwith/8)];

    [_avataraddTarget:selfaction:@selector(pickImage)forControlEvents:UIControlEventTouchUpInside];

    if(![fileManagerfileExistsAtPath:imageFilePath]) {

        [_avatarsetBackgroundColor:[UIColorblackColor]];

    }

    else{

    [_avatarsetBackgroundImage:[UIImageimageWithContentsOfFile:imageFilePath]forState:UIControlStateNormal];

    }

    [self.viewaddSubview:_avatar];

}

-(void)pickImage{

    UIActionSheet* actionSheet = [[UIActionSheetalloc]

                                  initWithTitle:@"选择头像来源"

                                  delegate:self

                                  cancelButtonTitle:@"取消"

                                  destructiveButtonTitle:nil

                                  otherButtonTitles:@"照相机",@"本地相簿",nil];

    [actionSheet showInView:self.view];

    

}

#pragma mark -

#pragma UIActionSheet Delegate

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex

{

    NSLog(@"buttonIndex = [%d]",buttonIndex);

    switch (buttonIndex) {

        case0://照相机

        {

            UIImagePickerController *imagePicker = [[UIImagePickerControlleralloc] init];

            imagePicker.delegate =self;

            imagePicker.allowsEditing =YES;

            imagePicker.sourceType =UIImagePickerControllerSourceTypeCamera;

            //            [self presentModalViewController:imagePicker animated:YES];

            [selfpresentViewController:imagePickeranimated:YEScompletion:nil];

        }

            break;

    

        case1://本地相簿

        {

            UIImagePickerController *imagePicker = [[UIImagePickerControlleralloc] init];

            imagePicker.delegate =self;

            imagePicker.allowsEditing =YES;

            imagePicker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;

            //            [self presentModalViewController:imagePicker animated:YES];

            [selfpresentViewController:imagePickeranimated:YEScompletion:nil];

        }

            break;

        default:

            break;

    }

}

#pragma mark -

#pragma UIImagePickerController Delegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

    if ([[infoobjectForKey:UIImagePickerControllerMediaType]isEqualToString:(__bridgeNSString *)kUTTypeImage]) {

        UIImage *img = [infoobjectForKey:UIImagePickerControllerEditedImage];

        [selfperformSelector:@selector(saveImage:) withObject:img afterDelay:0.5];

    }

    [picker dismissViewControllerAnimated:YEScompletion:nil];

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    //    [picker dismissModalViewControllerAnimated:YES];

    [picker dismissViewControllerAnimated:YEScompletion:nil];

}

- (void)saveImage:(UIImage *)image {

    //    NSLog(@"保存头像！");

    //    [userPhotoButton setImage:image forState:UIControlStateNormal];

    BOOL success;

    NSFileManager *fileManager = [NSFileManagerdefaultManager];

    NSError *error;

    

    NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);

    NSString *documentsDirectory = [pathsobjectAtIndex:0];

    NSString *imageFilePath = [documentsDirectorystringByAppendingPathComponent:@"avatar.jpg"];

    NSLog(@"imageFile->>%@",imageFilePath);

    success = [fileManager fileExistsAtPath:imageFilePath];

    if(success) {

        success = [fileManager removeItemAtPath:imageFilePatherror:&error];

    }

    //    UIImage *smallImage=[self scaleFromImage:image toSize:CGSizeMake(80.0f, 80.0f)];//将图片尺寸改为80*80

    UIImage *smallImage = [selfthumbnailWithImageWithoutScale:imagesize:CGSizeMake(93,93)];

    [UIImageJPEGRepresentation(smallImage,1.0f) writeToFile:imageFilePathatomically:YES];//写入文件

    UIImage *selfPhoto = [UIImageimageWithContentsOfFile:imageFilePath];//读取图片文件

    //    [userPhotoButton setImage:selfPhoto forState:UIControlStateNormal];

    [_avatarsetBackgroundImage:selfPhoto forState:UIControlStateNormal];

   // self.img.image = selfPhoto;

}

// 改变图像的尺寸，方便上传服务器

- (UIImage *) scaleFromImage: (UIImage *) image toSize: (CGSize) size

{

    UIGraphicsBeginImageContext(size);

    [image drawInRect:CGRectMake(0,0, size.width, size.height)];

    UIImage *newImage =UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return newImage;

}

- (void)didReceiveMemoryWarning

{

    [superdidReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

//2.保持原来的长宽比，生成一个缩略图

- (UIImage *)thumbnailWithImageWithoutScale:(UIImage *)image size:(CGSize)asize

{

    UIImage *newimage;

    if (nil == image) {

        newimage = nil;

    }

    else{

        CGSize oldsize = image.size;

        CGRect rect;

        if (asize.width/asize.height > oldsize.width/oldsize.height) {

            rect.size.width = asize.height*oldsize.width/oldsize.height;

            rect.size.height = asize.height;

            rect.origin.x = (asize.width - rect.size.width)/2;

            rect.origin.y =0;

        }

        else{

            rect.size.width = asize.width;

            rect.size.height = asize.width*oldsize.height/oldsize.width;

            rect.origin.x =0;

            rect.origin.y = (asize.height - rect.size.height)/2;

        }

        UIGraphicsBeginImageContext(asize);

        CGContextRef context =UIGraphicsGetCurrentContext();

        CGContextSetFillColorWithColor(context, [[UIColorclearColor] CGColor]);

        UIRectFill(CGRectMake(0,0, asize.width, asize.height));//clear background

        [image drawInRect:rect];

        newimage = UIGraphicsGetImageFromCurrentImageContext();

        UIGraphicsEndImageContext();

    }

    return newimage;

}

/*

#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