IOS picture local storage, local fetch, local delete

In iOS development, it is often used to localize images. IOS image local storage, local fetch, local delete, can be implemented by the following class methods.

Save a picture to a local

+ (void) saveimagetolocal: (uiimage*) image Keys: (nsstring*) key {

First, you need to get the sandbox path

nsstring *picpath=[nsstring stringwithformat:@ "%@/documents/%@.png", Nshomedirectory(), key];

NSLog(@ "Save picture to local %@", Picpath);

BOOL ishaveimage = [self localhaveimage:key];

if (ishaveimage) {

NSLog(@ "Local has saved the picture, no need to store it again ...");

return;

}

nsdata *imgdata = uiimagejpegrepresentation(image,0.5);

[Imgdata writetofile:picpath atomically:YES];

}

Get pictures from local

+ (uiimage*) getimagefromlocal: (nsstring*) key {

if ([jkblanktool Isblankstring:key]) {

return nil;

}

Read local picture non-resource

nsstring *picpath=[nsstring stringwithformat:@ "%@/documents/%@.png", Nshomedirectory (), key];

NSLog (@ "Get picture %@", Picpath);

UIImage *img=[[UIImage alloc]initwithcontentsoffile:p Icpath];

return img;

}

Do you have a picture locally?

+ (BOOL) Localhaveimage: (nsstring*) key {

if ([jkblanktool Isblankstring:key]) {

return NO;

}

Read local picture non-resource

nsstring *picpath=[nsstring stringwithformat:@ "%@/documents/%@.png", Nshomedirectory(), key];

NSLog (@ "Query for Presence%@", picpath);

UIImage *img=[[UIImage alloc]initwithcontentsoffile:p Icpath];

if (img) {

return YES;

}

return NO;

}

Remove a picture from the local

+ (void) Removeimagetolocalkeys: (nsstring*) key {

nsstring *picpath=[nsstring stringwithformat:@ "%@/documents/%@.png", Nshomedirectory (), key];

NSLog(@ "Remove picture from local %@", Picpath);

[[Nsfilemanager defaultmanager] removeItemAtPath:p icpath error:nil];

}

IOS picture Local storage, local fetch, local deletion