IOS照相

#import <UIKit/UIKit.h>

@interface AddPictureViewController : UIViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate,UIAlertViewDelegate>
{
UITextView *contenttextview;
UIImageView *contentimageview;
NSString *lastChosenMediaType;

}
@property(nonatomic,retain) IBOutlet UITextView *contenttextview;
@property(nonatomic,retain) IBOutlet UIImageView *contentimageview;
@property(nonatomic,copy) NSString *lastChosenMediaType;
-(IBAction)buttonclick:(id)sender;

@end

AddPictureViewController.h

我们需要添加以下两个库

QuartzCore

MobileCoreServices

在项目的General里找到  linked Frameworks and libraries 添加两个类库

然后修改XIB文件

#import "AddPictureViewController.h"
#import <QuartzCore/QuartzCore.h>
#import <QuartzCore/CoreAnimation.h>
#import <MobileCoreServices/UTCoreTypes.h>
@interface AddPictureViewController ()

@end

@implementation AddPictureViewController
@synthesize contentimageview;
@synthesize contenttextview;
@synthesize lastChosenMediaType;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
-(IBAction)buttonclick:(id)sender
{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"请选择图片来源" message:@"" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"拍照",@"从手机相册选择", nil];
[alert show];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma 拍照选择模块
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if(buttonIndex==1)
[self shootPiicturePrVideo];
else if(buttonIndex==2)
[self selectExistingPictureOrVideo];
}
#pragma mark- 拍照模块
//从相机上选择
-(void)shootPiicturePrVideo{
[self getMediaFromSource:UIImagePickerControllerSourceTypeCamera];
}
//从相册中选择
-(void)selectExistingPictureOrVideo{
[self getMediaFromSource:UIImagePickerControllerSourceTypePhotoLibrary];
}
#pragma 拍照模块
-(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
self.lastChosenMediaType=[info objectForKey:UIImagePickerControllerMediaType];
if([lastChosenMediaType isEqual:(NSString *) kUTTypeImage])
{
UIImage *chosenImage=[info objectForKey:UIImagePickerControllerEditedImage];
contentimageview.image=chosenImage;
}
if([lastChosenMediaType isEqual:(NSString *) kUTTypeMovie])
{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"提示信息!" message:@"系统只支持图片格式" delegate:nil cancelButtonTitle:@"确认" otherButtonTitles: nil];
[alert show];

}
[picker dismissModalViewControllerAnimated:YES];
}
-(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker{
[picker dismissModalViewControllerAnimated:YES];
}
-(void)getMediaFromSource:(UIImagePickerControllerSourceType)sourceType
{
NSArray *mediatypes=[UIImagePickerController availableMediaTypesForSourceType:sourceType];
if([UIImagePickerController isSourceTypeAvailable:sourceType] &&[mediatypes count]>0){
NSArray *mediatypes=[UIImagePickerController availableMediaTypesForSourceType:sourceType];
UIImagePickerController *picker=[[UIImagePickerController alloc] init];
picker.mediaTypes=mediatypes;
picker.delegate=self;
picker.allowsEditing=YES;
picker.sourceType=sourceType;
NSString *requiredmediatype=(NSString *)kUTTypeImage;
NSArray *arrmediatypes=[NSArray arrayWithObject:requiredmediatype];
[picker setMediaTypes:arrmediatypes];
[self presentModalViewController:picker animated:YES];
}
else{
UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"错误信息!" message:@"当前设备不支持拍摄功能" delegate:nil cancelButtonTitle:@"确认" otherButtonTitles: nil];
[alert show];
}
}
static UIImage *shrinkImage(UIImage *orignal,CGSize size)
{
CGFloat scale=[UIScreen mainScreen].scale;
CGColorSpaceRef colorSpace=CGColorSpaceCreateDeviceRGB();
CGContextRef context=CGBitmapContextCreate(NULL, size.width *scale,size.height*scale, 8, 0, colorSpace, kCGImageAlphaPremultipliedFirst);
CGContextDrawImage(context, CGRectMake(0, 0, size.width*scale, size.height*scale), orignal.CGImage);
CGImageRef shrunken=CGBitmapContextCreateImage(context);
UIImage *final=[UIImage imageWithCGImage:shrunken];
CGContextRelease(context);
CGImageRelease(shrunken);
return final;
}

@end

AddPictureViewController.m