- (BOOL)setResourceValue:(id)value forKey:(NSString *)key error:(NSError **)error

如果我们的APP需要存放比较大的文件的时候,同时又不希望被系统清理掉,那我么我们就需要把我们的资源保存在Documents目录下,但是我们又不希望他会被iCloud备份,因此就有了这个方法

[URL setResourceValue: [NSNumber numberWithBool: YES] forKey: NSURLIsExcludedFromBackupKey error: &error];

NSURLIsExcludedFromBackupKey:不被备份;

时间: 2024-09-30 06:49:08

- (BOOL)setResourceValue:(id)value forKey:(NSString *)key error:(NSError **)error的相关文章

KVC - (void)setValue:(nullable id)value forKey:(NSString *)key;

关于KVC的方法 - (void)setValue:(nullable id)value forKey:(NSString *)key; 从上面的参数类型可以看出,value必须是一个对象,可以为nil对象. 当你的属性是@property (nonatomic, assign) NSInteger testNum; 则在使用KVC时,必须将其转换成NSNumber对象,或NSString对象.但不能转换成数组等其他对象类型. [self setValue:@99 forKey:@"testNu

- (BOOL)isEqual:(id)object

每个对象都有 - (BOOL)isEqual:(id)object这个方法 例如: /** * 常用来比较两个HWEmotion对象(地址)是否一样 * * @param other 另外一个HWEmotion对象 * * @return YES : 代表2个对象是一样的,NO: 代表2个对象是不一样 */ - (BOOL)isEqual:(HWEmotion *)other { // if (self == other) { // return YES; // } else { // retu

MySQL主从复制中断,报“Error on master: message (format)='Cannot delete or update a parent row: a foreign key constraint fails' error code=1217” 错误

前几天,发现从库挂了,具体报错信息如下: 分析思路 1. 因为我采用的是选择性复制,只针对以下几个库进行复制: card,upay,deal,monitor,collect.所以,不太可能出现对于sas_basic的操作能复制到该从库上. 2. 整个架构是1主2从,且都是选择性复制,上面这个从库是直接复制card,upay,deal,monitor,collect这几个数据库的数据,而另外一个从库则是忽略上述库,如下所示: 怀疑是在上述schema下,执行了DROP TABLE IF EXIST

Object comparison - (BOOL)isEqual:(id)other

https://developer.apple.com/library/content/documentation/General/Conceptual/DevPedia-CocoaCore/ObjectComparison.html#//apple_ref/doc/uid/TP40008195-CH37-SW3 Object comparison refers to the ability of an object to determine whether it is essentially

微信小程序云开发导入json数据报错:导入数据库失败, Error: Poll error, 导入数据任务(id:528440)异常,错误信息:line 1, column 750: bare " in non-quoted-field

错误信息如下: 导入数据库失败, Error: Poll error, 导入数据任务(id:528440)异常,错误信息:line 1, column 750: bare " in non-quoted-field 导入数据库失败, Error: Poll error, 导入数据任务(id:528445)异常,错误信息:解析json文档错误,请检查导入文件格式,错误详情如下:invalid character ',' looking for beginning of value 导入JSON格式

Data Flow ->> Excel Connection遇到错误:[Excel Source [16]] Error: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER.....

在SSIS下做Excel导入数据的时候遇到下面的错误 [Excel Source [16]] Error: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "Excel Connection Manager" failed with error code 0xC0209303. T

BIP Requests Are Failing With Error "OPP Error Oracle.apps.xdo.XDOException: Error Creating Lock Fil

In this Document   Symptoms   Cause   Solution   References Applies to: BI Publisher (formerly XML Publisher) - Version 12.1 to 12.2 [Release 12.1 to 12.2] Information in this document applies to any platform. Symptoms BiP Requests are failing: ERROR

virt-install:ERROR internal error process exited while connecting to monitor

转载请注明出处:http://www.openext.org/2014/06/virt-install-erro1 使用virt-install安装vm的时候出现了一下错误,解决方法如下: $sudo ./create-vm-demo.sh Starting install- ERROR internal error process exited while connecting to monitor: char device redirected to /dev/pts/2 kvm: -dri

IE11 Windows7下F12 DOC资源管理器不能用Exception in window.onload: Error: An error has ocurredJSPlugin.3005

------------------ Diagnostic: Exception in window.onload: Error: An error has ocurredJSPlugin.3005 Stack Trace: Error: An error has ocurredJSPlugin.3005 at getString (res://C:\Program Files\Internet Explorer\F12Resources.dll/23/pluginhost/plugin.f12