我的第一个有点意思的IOS工程 - 图片局部放大

来源：互联网发布：知乎是什么软件编辑：程序博客网时间：2024/04/29 11:18

是一个sva工程，现在可以把图片局部放大4倍，后期有时间了加上新的控制和设置部分

// ViewController.h

// sva_10_7_1

// Created by 李吉 on 15/9/4.

#import <UIKit/UIKit.h>

@interface ViewController :UIViewController

{

NSArray *aryStrImageName;

NSInteger iImageNumber;

UIGestureRecognizer *gr;

}

@property (strong,nonatomic) IBOutletUIImageView *ivMain;

@property (strong,nonatomic) IBOutletUIImageView *ivSubMain;

- (IBAction)onBtnLastImageTouchUp:(id)sender;

- (IBAction)onBtnNextImageTouchUp:(UIButton *)sender;

- (IBAction)onBtnVaguerImageTouchUp:(UIButton *)sender;

- (IBAction)onBtnObviouserTouchUp:(UIButton *)sender;

@end

// ViewController.m

// sva_10_7_1

// Created by 李吉 on 15/9/4.

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

[superviewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

@try {

self.view.backgroundColor=[UIColorcolorWithRed:0.2green:0.2blue:0.2alpha:1];

self.ivMain.highlighted=YES;

aryStrImageName=[NSArrayarrayWithObjects:@"lijiang.jpg",@"qiao.jpg",@"shuangta.jpg",@"shui.jpg",@"xiangbi.jpg",nil];

iImageNumber=0;

if(aryStrImageName.count>0)

_ivMain.image=[UIImageimageNamed:aryStrImageName[0]];

self.ivMain.userInteractionEnabled=YES;

UITapGestureRecognizer *st=[[UITapGestureRecognizeralloc] initWithTarget:selfaction:@selector(ivMainTap:)];

[self.ivMainaddGestureRecognizer:st];

_ivSubMain.contentMode=UIViewContentModeScaleToFill;

_ivMain.contentMode=UIViewContentModeScaleToFill;

_ivSubMain.image=nil;

}

@catch (NSException *exception) {

NSLog(@"%@\n",exception.reason);

}

@finally {

}

//将触摸点的图像放大，显示在ivSubMain控件上

-(IBAction)ivMainTap:(UIGestureRecognizer *)sender

{

bool bIsTouchValid=YES;

NSUInteger uiWidthInImage=(_ivMain.image.size.width/_ivMain.frame.size.width)*50;

NSUInteger uiHeightInImage=(_ivMain.image.size.height/_ivMain.frame.size.height)*50;

CGPoint ptTouch = [senderlocationInView:self.ivMain];

CGFloat fX=(ptTouch.x-25)*(_ivMain.image.size.width/_ivMain.frame.size.width);

CGFloat fY=(ptTouch.y-25)*(_ivMain.image.size.height/_ivMain.frame.size.height);

if(ptTouch.x-25<0||ptTouch.x+25>300)

bIsTouchValid=NO;

if(ptTouch.y-25<0||ptTouch.y+25>300)

bIsTouchValid=NO;

if(!bIsTouchValid)

self.ivSubMain.image=nil;

else

{

CGImageRef imgrfOrigin=_ivMain.image.CGImage;

CGImageRef imgrfDest=CGImageCreateWithImageInRect(imgrfOrigin,CGRectMake(fX, fY, uiWidthInImage, uiHeightInImage));

_ivSubMain.contentMode=UIViewContentModeScaleToFill;

_ivSubMain.image=[UIImageimageWithCGImage:imgrfDest];

}

- (void)didReceiveMemoryWarning {

[superdidReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

- (IBAction)onBtnLastImageTouchUp:(id)sender {

if(--iImageNumber<0)

iImageNumber=aryStrImageName.count-1;

self.ivMain.image=[UIImageimageNamed:aryStrImageName[iImageNumber]];

_ivSubMain.image=nil;

}

- (IBAction)onBtnNextImageTouchUp:(UIButton *)sender {

iImageNumber=++iImageNumber%aryStrImageName.count;

self.ivMain.image=[UIImageimageNamed:aryStrImageName[iImageNumber]];

_ivSubMain.image=nil;

}

- (IBAction)onBtnVaguerImageTouchUp:(UIButton *)sender {

_ivMain.alpha-=0.1;

if(_ivMain.alpha<0)

_ivMain.alpha=0;

_ivSubMain.alpha=_ivMain.alpha;

}

- (IBAction)onBtnObviouserTouchUp:(UIButton *)sender {

_ivMain.alpha+=0.1;

if(_ivMain.alpha>1)

_ivMain.alpha=1;

_ivSubMain.alpha=_ivMain.alpha;

}

@end

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="7531" systemVersion="14D2134" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="vXZ-lx-hvc">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="7520"/>
</dependencies>
<scenes>

<scene sceneID="ufC-wZ-h7g">
<objects>
<viewController id="vXZ-lx-hvc" customClass="ViewController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="jyV-Pf-zRb"/>
<viewControllerLayoutGuide type="bottom" id="2fi-mo-0CV"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="kh9-bI-dsS">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<subviews>
<imageView userInteractionEnabled="NO" contentMode="scaleToFill" horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="mKW-vM-RAo">
<rect key="frame" x="87" y="447" width="200" height="200"/>
</imageView>
<button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="jA4-7F-tDK">
<rect key="frame" x="26" y="50" width="50" height="30"/>
<color key="backgroundColor" red="0.0" green="0.0" blue="0.46788990825688076" alpha="1" colorSpace="calibratedRGB"/>
<fontDescription key="fontDescription" type="system" pointSize="15"/>
<state key="normal" title="上一张">
<color key="titleColor" red="1" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
<color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
</state>
<connections>
<action selector="onBtnLastImageTouchUp:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="b3q-WK-1OX"/>
</connections>
</button>
<button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="7FY-Zf-9Bn">
<rect key="frame" x="116" y="50" width="50" height="30"/>
<color key="backgroundColor" red="0.0" green="0.0" blue="0.46788990825688076" alpha="1" colorSpace="calibratedRGB"/>
<fontDescription key="fontDescription" type="system" pointSize="15"/>
<state key="normal" title="下一张">
<color key="titleColor" red="1" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
<color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
</state>
<connections>
<action selector="onBtnNextImageTouchUp:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="FqY-Iy-fbt"/>
</connections>
</button>
<button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="oFa-Jf-LMp">
<rect key="frame" x="206" y="50" width="50" height="30"/>
<color key="backgroundColor" red="0.0" green="0.0" blue="0.46788990825688076" alpha="1" colorSpace="calibratedRGB"/>
<fontDescription key="fontDescription" type="system" pointSize="15"/>
<state key="normal" title="变淡">
<color key="titleColor" red="1" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
<color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
</state>
<connections>
<action selector="onBtnVaguerImageTouchUp:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="t8k-vI-Nak"/>
</connections>
</button>
<button opaque="NO" contentMode="scaleToFill" fixedFrame="YES" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="Ffg-bT-hun">
<rect key="frame" x="296" y="50" width="50" height="30"/>
<color key="backgroundColor" red="0.0" green="0.0" blue="0.46788990825688076" alpha="1" colorSpace="calibratedRGB"/>
<fontDescription key="fontDescription" type="system" pointSize="15"/>
<state key="normal" title="增强">
<color key="titleColor" red="1" green="0.0" blue="0.0" alpha="1" colorSpace="calibratedRGB"/>
<color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
</state>
<connections>
<action selector="onBtnObviouserTouchUp:" destination="vXZ-lx-hvc" eventType="touchUpInside" id="SSb-UJ-LRf"/>
</connections>
</button>
<imageView contentMode="scaleAspectFit" horizontalHuggingPriority="251" verticalHuggingPriority="251" fixedFrame="YES" image="xiangbi.jpg" translatesAutoresizingMaskIntoConstraints="NO" id="PeG-Xu-JJG">
<rect key="frame" x="37" y="119" width="300" height="300"/>
</imageView>
</subviews>
<color key="backgroundColor" red="0.0" green="0.12232415902140673" blue="0.11926605504587151" alpha="1" colorSpace="calibratedRGB"/>
</view>
<simulatedScreenMetrics key="simulatedDestinationMetrics" type="retina47"/>
<connections>
<outlet property="ivMain" destination="PeG-Xu-JJG" id="7yj-Bj-nxg"/>
<outlet property="ivSubMain" destination="mKW-vM-RAo" id="PgT-FZ-oC9"/>
</connections>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="x5A-6p-PRh" sceneMemberID="firstResponder"/>
</objects>
</scene>
</scenes>
<resources>
<image name="xiangbi.jpg" width="1024" height="768"/>
</resources>
</document>

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