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
{
[superviewDidLoad];
//设置图片框
self.img = [[UIImageViewalloc] initWithFrame:CGRectMake(100,100, 93, 93)];
UIBarButtonItem *left = [[UIBarButtonItemalloc] initWithTitle:@"picture"style:UIBarButtonItemStyleBorderedtarget:selfaction:@selector(takePictureClick:)];
self.navigationItem.rightBarButtonItem = left;
[self.viewaddSubview: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 = [UIImageimageWithContentsOfFile:imageFilePath];//
self.img.image = selfPhoto;
[self.img.layersetCornerRadius:CGRectGetHeight([self.imgbounds]) / 2];
self.img.layer.masksToBounds = YES;
}
//从相册获取图片
-(void)takePictureClick:(UIButton *)sender
{
UIActionSheet* actionSheet = [[UIActionSheetalloc]
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];
[actionSheetshowInView: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 = [[UIImagePickerControlleralloc] init];
imagePicker.delegate =self;
imagePicker.allowsEditing =YES;
imagePicker.sourceType =UIImagePickerControllerSourceTypeCamera;
// [self presentModalViewController:imagePicker animated:YES];
[selfpresentViewController:imagePicker animated:YEScompletion:nil];
}
break;
case 1://摄像机
{
UIImagePickerController *imagePicker = [[UIImagePickerControlleralloc] init];
imagePicker.delegate =self;
imagePicker.allowsEditing =YES;
imagePicker.sourceType =UIImagePickerControllerSourceTypeCamera;
imagePicker.videoQuality =UIImagePickerControllerQualityTypeLow;
// [self presentModalViewController:imagePicker animated:YES];
[selfpresentViewController:imagePicker animated:YEScompletion:nil];
}
break;
case 2://本地相簿
{
UIImagePickerController *imagePicker = [[UIImagePickerControlleralloc] init];
imagePicker.delegate =self;
imagePicker.allowsEditing =YES;
imagePicker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;
// [self presentModalViewController:imagePicker animated:YES];
[selfpresentViewController:imagePicker animated:YEScompletion:nil];
}
break;
case 3://本地视频
{
UIImagePickerController *imagePicker = [[UIImagePickerControlleralloc] init];
imagePicker.delegate =self;
imagePicker.allowsEditing =YES;
imagePicker.sourceType =UIImagePickerControllerSourceTypePhotoLibrary;
// [self presentModalViewController:imagePicker animated:YES];
[selfpresentViewController:imagePicker animated: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];
}
elseif ([[info objectForKey:UIImagePickerControllerMediaType]isEqualToString:(__bridgeNSString *)kUTTypeMovie]) {
NSString *videoPath = [[infoobjectForKey:UIImagePickerControllerMediaURL]path];
self.fileData = [NSDatadataWithContentsOfFile:videoPath];
}
// [picker dismissModalViewControllerAnimated:YES];
[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 = [paths objectAtIndex:0];
NSString *imageFilePath = [documentsDirectory stringByAppendingPathComponent:@"selfPhoto.jpg"];
NSLog(@"imageFile->>%@",imageFilePath);
success = [fileManagerfileExistsAtPath:imageFilePath];
if(success) {
success = [fileManagerremoveItemAtPath: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 = [selfthumbnailWithImageWithoutScale:image size:CGSizeMake(93,93)];
[UIImageJPEGRepresentation(smallImage,1.0f) writeToFile:imageFilePath atomically:YES];//写入文件
UIImage *selfPhoto = [UIImageimageWithContentsOfFile: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);
[imagedrawInRect: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, [[UIColorclearColor] CGColor]);
UIRectFill(CGRectMake(0,0, asize.width, asize.height));//clear background
[imagedrawInRect:rect];
newimage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
}
return newimage;
}
@end