iphone document 图片存储和读取_移动开发

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2014/7/16 10:33:25 wx0123 程序员俱乐部我要评论(0)

摘要：存：Java代码//此处首先指定了图片存取路径（默认写到应用程序沙盒中）NSArray*paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);//并给文件起个文件名NSString*uniquePath=[[pathsobjectAtIndex:0]stringByAppendingPathComponent:@"pin.png"]
标签：iphone 图片

存：class="Apple-converted-space"> Java代码

//此处首先指定了图片存取路径（默认写到应用程序沙盒中）
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
//并给文件起个文件名
NSString *uniquePath=[[paths objectAtIndex:0] stringByAppendingPathComponent:@"pin.png"];
BOOL blHave=[[NSFileManager defaultManager] fileExistsAtPath:uniquePath];
if (blHave) {
NSLog(@"already have");
return ;
}
//此处的方法是将图片写到Documents文件中如果写入成功会弹出一个警告框,提示图片保存成功
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");
}

取： Java代码

NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *filePath2 = [documentsDirectory stringByAppendingPathComponent:@"pin.png"];
UIImage *img = [UIImage imageWithContentsOfFile:filePath2];
[image setImage:img];
NSLog(@"图片：：：：：：：：：%@",image.image);

删： Java代码

NSFileManager* fileManager=[NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
//文件名
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");
}
}