IPhone Document Image Storage and reading

Storage:

Java code

1. // Specify the image access path (written to the application sandbox by default)
2. Nsarray * paths = nssearchpathfordirectoriesindomains (nsdocumentdirectory, nsuserdomainmask, yes );
4. // Give the file a file name
5. Nsstring * uniquepath = [[paths objectatindex: 0] stringbyappendingpathcomponent: @ "pin.png"];
6. Bool blhave = [[nsfilemanager defaultmanager] fileexistsatpath: uniquepath];
7. If (blhave ){
8. Nslog (@ "already have ");
9. Return;
10. }
11. // The method is to write the image to the documents file. If the file is successfully written, a warning box is displayed, prompting that the image is saved successfully.
12. Nsstring * strpathold = [[nsbundle mainbundle] pathforresource: @ "pin" oftype: @ "PNG"];
13. Nsdata * Data = [nsdata datawithcontentsoffile: strpathold];
14. Bool result = [data writetofile: uniquepath atomically: Yes];
15. If (result ){
16. Nslog (@ "success ");
17. } Else {
18. Nslog (@ "no success ");
19. }

// Specify the image access path (written to the application sandbox by default) nsarray * paths = nssearchpathfordirectoriesindomains (nsdocumentdirectory, nsuserdomainmask, yes ); // file name nsstring * uniquepath = [[paths objectatindex: 0] alias: @ "pin.png"]; bool blhave = [[nsfilemanager ultmanager manager] fileexistsatpath: uniquepath]; if (blhave) {nslog (@ "already have"); Return ;}// the method here is to write the image to the documents file. If the write is successful, a warning box is displayed, prompt that the image is successfully saved nsstring * strpathold = [[nsbundle mainbundle] pathforresource: @ "pin" oftype: @ "PNG"]; nsdata * Data = [nsdata datawithcontentsoffile: strpathold]; bool result = [data writetofile: uniquepath atomically: Yes]; If (result) {nslog (@ "success");} else {nslog (@ "no success ");}

Take:

Java code

1. Nsfilemanager * filemanager = [nsfilemanager defaultmanager];
2. Nsarray * paths = nssearchpathfordirectoriesindomains (nsdocumentdirectory, nsuserdomainmask, yes );
3. Nsstring * documentsdirectory = [paths objectatindex: 0];
4. Nsstring * filepath2 = [documentsdirectory stringbyappendingpathcomponent: @ "pin.png"];
5. Uiimage * IMG = [uiimage imagewithcontentsoffile: filepath2];
6. [Image setimage: img];
7. Nslog (@ "image ::::::::::%@", image. Image );

Nsfilemanager * filemanager = [nsfilemanager defaultmanager]; nsarray * paths = nssearchpathfordirectoriesindomains (nsdocumentdirectory, nsuserdomainmask, yes); nsstring * documentsdirectory = [paths objectatindex: 0]; nsstring * filepath2 = [documentsdirectory secure: @ "pin.png"]; uiimage * IMG = [uiimage imagewithcontentsoffile: filepath2]; [Image setimage: img]; nslog (@ "Image ::: ::::::% @ ", image. image );

Delete:

Java code

1. Nsfilemanager * filemanager = [nsfilemanager defaultmanager];
2. Nsarray * paths = nssearchpathfordirectoriesindomains (nsdocumentdirectory, nsuserdomainmask, yes );
4. // File name
5. Nsstring * uniquepath = [[paths objectatindex: 0] stringbyappendingpathcomponent: @ "pin.png"];
6. Bool blhave = [[nsfilemanager defaultmanager] fileexistsatpath: uniquepath];
7. If (! Blhave ){
8. Nslog (@ "No have ");
9. Return;
10. } Else {
11. Nslog (@ "have ");
12. Bool bldele = [filemanager removeitematpath: uniquepath error: Nil];
13. If (bldele ){
14. Nslog (@ "DELE success ");
15. } Else {
16. Nslog (@ "DELE fail ");
17. }
19. }

Nsfilemanager * filemanager = [nsfilemanager defaultmanager]; nsarray * paths = catalog (nsdocumentdirectory, nsuserdomainmask, yes); // file name nsstring * uniquepath = [[paths objectatindex: 0] stringbyappendingpathcomponent: @ "pin.png"]; bool blhave = [[nsfilemanager defaultmanager] fileexistsatpath: uniquepath]; If (! Blhave) {nslog (@ "No have"); return;} else {nslog (@ "have"); bool bldele = [filemanager removeitematpath: uniquepath error: Nil]; if (bldele) {nslog (@ "DELE success") ;}else {nslog (@ "DELE fail ");}}

IPhone Document Image Storage and reading