iOS 实现头像选取（照相或者图片库）、大小等比缩放、生成圆形头像

//

//  ViewController.h

//  TestImageController

//

//  Created by huweibin on 15-5-17.

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

//

#import <UIKit/UIKit.h>

#import <MobileCoreServices/MobileCoreServices.h>

#import <QuartzCore/QuartzCore.h>

@interface ViewController :
UIViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIActionSheetDelegate>

@end

//

//  ViewController.m

//  TestImageController

//

//

//  Created by huweibin on 15-5-17.

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

//

#import "ViewController.h"

@interface
ViewController ()

@property(nonatomic,
strong) UIImageView *img;

@property(nonatomic,
strong) NSData *fileData;

@end

@implementation ViewController

- (void)viewDidLoad

{

[super
viewDidLoad];

//设置图片框

self.img = [[UIImageView
alloc] initWithFrame:CGRectMake(100,
100,
93, 93)];

UIBarButtonItem *left = [[UIBarButtonItem
alloc] initWithTitle:@"picture"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(takePictureClick:)];

self.navigationItem.rightBarButtonItem = left;

[self.view
addSubview:self.img];

//图片路径

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

NSString *documentsDirectory = [paths
objectAtIndex:0];

NSString *imageFilePath = [documentsDirectory
stringByAppendingPathComponent:@"selfPhoto.jpg"];

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

UIImage *selfPhoto = [UIImage
imageWithContentsOfFile:imageFilePath];//

self.img.image = selfPhoto;

[self.img.layer
setCornerRadius:CGRectGetHeight([self.img
bounds]) / 2];

self.img.layer.masksToBounds
= YES;

}

//从相册获取图片

-(void)takePictureClick:(UIButton *)sender

{

UIActionSheet* actionSheet = [[UIActionSheet
alloc]

initWithTitle:@"请选择文件来源"

delegate:self

cancelButtonTitle:@"取消"

destructiveButtonTitle:nil

otherButtonTitles:@"照相机",@"摄像机",@"本地相簿",@"本地视频",nil];

[actionSheet
showInView:self.view];

}

#pragma mark -

#pragma UIActionSheet Delegate

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

{

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

switch (buttonIndex) {

case 0://照相机

{

UIImagePickerController *imagePicker = [[UIImagePickerController
alloc]
init];

imagePicker.delegate =
self;

imagePicker.allowsEditing =
YES;

imagePicker.sourceType =
UIImagePickerControllerSourceTypeCamera;

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

[self
presentViewController:imagePicker animated:YES
completion:nil];

}

break;

case 1://摄像机

{

UIImagePickerController *imagePicker = [[UIImagePickerController
alloc]
init];

imagePicker.delegate =
self;

imagePicker.allowsEditing =
YES;

imagePicker.sourceType =
UIImagePickerControllerSourceTypeCamera;

imagePicker.videoQuality =
UIImagePickerControllerQualityTypeLow;

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

[self
presentViewController:imagePicker animated:YES
completion:nil];

}

break;

case 2://本地相簿

{

UIImagePickerController *imagePicker = [[UIImagePickerController
alloc]
init];

imagePicker.delegate =
self;

imagePicker.allowsEditing =
YES;

imagePicker.sourceType =
UIImagePickerControllerSourceTypePhotoLibrary;

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

[self
presentViewController:imagePicker animated:YES
completion:nil];

}

break;

case 3://本地视频

{

UIImagePickerController *imagePicker = [[UIImagePickerController
alloc]
init];

imagePicker.delegate =
self;

imagePicker.allowsEditing =
YES;

imagePicker.sourceType =
UIImagePickerControllerSourceTypePhotoLibrary;

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

[self
presentViewController:imagePicker animated:YES
completion:nil];

}

break;

default:

break;

}

}

#pragma mark -

#pragma UIImagePickerController Delegate

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

{

if ([[info
objectForKey:UIImagePickerControllerMediaType]
isEqualToString:(__bridge
NSString *)kUTTypeImage]) {

UIImage *img = [info
objectForKey:UIImagePickerControllerEditedImage];

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

}

else
if ([[info
objectForKey:UIImagePickerControllerMediaType]
isEqualToString:(__bridge
NSString *)kUTTypeMovie]) {

NSString *videoPath = [[info
objectForKey:UIImagePickerControllerMediaURL]
path];

self.fileData = [NSData
dataWithContentsOfFile:videoPath];

}

//    [picker dismissModalViewControllerAnimated:YES];

[picker dismissViewControllerAnimated:YES
completion:nil];

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

//    [picker dismissModalViewControllerAnimated:YES];

[picker dismissViewControllerAnimated:YES
completion:nil];

}

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

//    NSLog(@"保存头像！");

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

BOOL success;

NSFileManager *fileManager = [NSFileManager
defaultManager];

NSError *error;

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

NSString *documentsDirectory = [paths
objectAtIndex:0];

NSString *imageFilePath = [documentsDirectory
stringByAppendingPathComponent:@"selfPhoto.jpg"];

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

success = [fileManager
fileExistsAtPath:imageFilePath];

if(success) {

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

}

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

UIImage *smallImage = [self
thumbnailWithImageWithoutScale:image
size:CGSizeMake(93,
93)];

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

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

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;

}

//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, [[UIColor
clearColor] CGColor]);

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

[image
drawInRect:rect];

newimage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

}

return newimage;

}

@end

时间： 2024-07-28 23:16:40

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