随笔分类 -  IOS之image相关函数

摘要：http://blog.csdn.net/pkukevin/article/details/6681217http://www.cocoachina.com/bbs/read.php?tid=368960,关于初始化使用ImageNamed方法,类方法,系统有缓存autorealease使NSData的话,系统不会有缓存,这样作者可以很好的控制系统内存1.等比率缩放- (UIImage *)scaleImage:(UIImage *)image toScale:(float)scaleSize{UIGraphicsBeginImageContext(CGSizeMake(image.size. 阅读全文

摘要：- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{UIImage *baseImage = [info objectForKey:UIImagePickerControllerOriginalImage];if (baseImage == nil) return;compositeImage = [self addOverlayToBaseImage:baseImage];NSArray *paths = NSSea 阅读全文

摘要：NSString *path =[[NSBundle mainBundle] pathForResource:@"icon" ofType:@"png"];MyImage = [UIImage imageWithContentsOfFile:path]; 阅读全文

摘要：UIGraphicsBeginImageContext(currentView.bounds.size); //currentView 当前的view[currentView.layer renderInContext:UIGraphicsGetCurrentContext()];UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil); 阅读全文

摘要：UIImageView：可以通过UIImage加载图片赋给UIImageView，加载后你可以指定显示的位置和大小。1、初始化UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0.0,45.0,300,300)];imageView.image = [UIImage imageNamed:@"a.png"];//加载入图片[self.view addSubView:image];[imageView release];//imageNamed方法是不能通过路径进行加载图片的，此方式容 阅读全文

摘要：1. 在xcode中新建一个基于view的工程，命名为PicViewer2.修改PicViewerViewController.h：#import <UIKit/UIKit.h>@interface PicViewerViewController : UIViewController<UIGestureRecognizerDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate> { IBOutletUIImageView *imageView;}@property (nonato 阅读全文

摘要：1：原文摘自：http://www.mobiletrain.org/lecture/doc/iphone/2011-10/735.html在 iPhone 应用里加入全屏动画可以让应用更具趣味性，以下这段代码可以实现这一功能AnimationDemoViewController.m- (void)viewDidLoad {[super viewDidLoad];//指定ImageView的展示区域UIImageView *fishAni=［UIImageView alloc] initWithFrame:［UIScreen mainScreen] bounds］;//将指定的图片载入至 ani 阅读全文