iOS notes file Read/write
Last Update:2015-06-08
Source: Internet
Author: User
<span id="Label3"></p><p><p>Recent projects to store a set of picture data, pictures with name,date and other properties, processing is to say that image image directly exists in the sandbox documents file, and then use the plist file to store picture properties and image path.</p></p><p><p>Deposit Image:</p></p><pre>- (<span style="color: #0000ff;"><span style="color: #0000ff;">void</span></span>) Savephotos: (nsarray *<span style="color: #000000;"><span style="color: #000000;">) Photos {nsarray</span></span>*paths =<span style="color: #000000;"><span style="color: #000000;">nssearchpathfordirectoriesindomains (nsdocumentdirectory, nsuserdomainmask, YES); NSString</span></span>*plistpath = [[paths objectatindex:<span style="color: #800080;"><span style="color: #800080;">0</span></span>] Stringbyappendingpathcomponent:<span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">photo_info.plist</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; NSString</span></span>*filepath = [[paths objectatindex:<span style="color: #800080;"><span style="color: #800080;">0</span></span>] Stringbyappendingpathcomponent:<span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">Image</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; NSLog (</span></span><span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">%@</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">, filePath); Nsfilemanager</span></span>* FileManager =<span style="color: #000000;"><span style="color: #000000;">[nsfilemanager defaultmanager]; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(!<span style="color: #000000;"><span style="color: #000000;">[filemanager Fileexistsatpath:plistpath]) {[filemanager Createfileatpath:plistpath Contents:nil attributes:nil]; } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">if</span></span>(!<span style="color: #000000;"><span style="color: #000000;">[filemanager Fileexistsatpath:filepath]) {[filemanager Createdirectoryatpath:filepath withintermediatedirectories:no Attributes:nil error:nil]; } Nsmutablearray</span></span>*savephotos =<span style="color: #000000;"><span style="color: #000000;">[[nsmutablearray alloc] init]; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> for</span>(Photo *photo<span style="color: #0000ff;"><span style="color: #0000ff;">inch</span></span><span style="color: #000000;"><span style="color: #000000;">PHOTOS) {nsmutabledictionary</span></span>*info =<span style="color: #000000;"><span style="color: #000000;">[[nsmutabledictionary alloc]init]; NSString</span></span>*imagepath = [filePath stringbyappendingpathcomponent:[nsstring stringwithformat:<span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">%@.jpg</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">, photo.name]]; [uiimagepngrepresentation (photo.image) Writetofile:imagepath atomically:yes]; [info Setobject:imagepath forkey:</span></span><span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">ImagePath</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; [info setObject:photo.name forkey:</span></span><span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">Name</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; [info setObject:photo.tags forkey:</span></span><span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">Tags</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; [info setObject:photo.date forkey:</span></span><span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">Date</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; [savephotos addobject:info]; } [savephotos Writetofile:plistpath atomically:yes];}</span></span></pre><p><p></p></p><p><p>To read a picture:</p></p><pre>-(nsarray *<span style="color: #000000;"><span style="color: #000000;">) Loadphotosfromdisk {</span></span><span style="color: #008000;"><span style="color: #008000;">//</span></span><span style="color: #008000;"><span style="color: #008000;">read pictures from local</span></span>Nsarray *paths =<span style="color: #000000;"><span style="color: #000000;">nssearchpathfordirectoriesindomains (nsdocumentdirectory, nsuserdomainmask, YES); NSString</span></span>*plistpath = [[paths objectatindex:<span style="color: #800080;"><span style="color: #800080;">0</span></span>] Stringbyappendingpathcomponent:<span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">photo_info.plist</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; Nsarray</span></span>*photosarr =<span style="color: #000000;"><span style="color: #000000;">[nsarray arraywithcontentsoffile:plistpath]; </span></span><span style="color: #0000ff;"><span style="color: #0000ff;"></span> for</span>(nsdictionary *dic<span style="color: #0000ff;"><span style="color: #0000ff;">inch</span></span><span style="color: #000000;"><span style="color: #000000;">Photosarr) {Photo</span></span>*photo =<span style="color: #000000;"><span style="color: #000000;">[[Photo alloc] init]; Photo.image</span></span>= [UIImage Imagewithcontentsoffile:[dic valueforkey:<span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">ImagePath</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]]; Photo.name</span></span>= [dic valueforkey:<span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">Name</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; Photo.tags</span></span>= [dic valueforkey:<span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">Tags</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; Photo.date</span></span>= [dic valueforkey:<span style="color: #800000;"><span style="color: #800000;">@"</span></span><span style="color: #800000;"><span style="color: #800000;">Date</span></span><span style="color: #800000;"><span style="color: #800000;">"</span></span><span style="color: #000000;"><span style="color: #000000;">]; [self.photos addobject:photo]; } </span></span><span style="color: #0000ff;"><span style="color: #0000ff;">return</span></span><span style="color: #000000;"><span style="color: #000000;">self.photos;}</span></span></pre><p><p></p></p><p><p>iOS notes file Read/write</p></p></span>
