nspredicate iphone 问题
我有以下代码，
NSPredicate* predicate = [NSPredicate predicateWithFormat:@"Word== %@", randomWord];
rows = [[courseArray filteredArrayUsingPredicate:predicate]retain];
我在搜索栏中使用它。我有两个问题 - 如何制作 NSPredicate 以便它接受以键入的字符开头的每个单词，而不是使其值等于另一个？例如，我的数组中有“Men，Many，Morons，Now，Never”，当我输入“M”时，我希望添加“Men，Many，Morons”。此外，我如何谓词超过 1 个值？那么它比较两种格式？
谢谢...
i have the following code
NSPredicate* predicate = [NSPredicate predicateWithFormat:@"Word== %@", randomWord];
rows = [[courseArray filteredArrayUsingPredicate:predicate]retain];
I am using this in a search bar. I have two questions - how can i make the NSPredicate so it takes every word that begins with the characters typed rather than having a value equal another? e.g I have "Men, Many,Morons, Now,Never" in the array, and when i type "M" i want "Men,Many,Morons" to be added. Furthermore, how can i predicate more than 1 value? so it compares between two formats?
thanks...
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尝试
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"Word BEGINSWITH %@", randomWord];如果你想搜索整个单词，你可以尝试
CONTAINS..Try
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"Word BEGINSWITH %@", randomWord];If you want to search the whole word you can try
CONTAINS..NSPredicate文档是一个很好的起点。
检查字符串是否以另一个字符串开头的谓词是
[NSPredicate predicateWithFormat:@"Word BEGINSWITH %@"]并且就检查两个谓词而言，您正在寻找
NSCompoundPredicate。The NSPredicate documentation is a good place to start.
The predicate to check if the string begins with another is
[NSPredicate predicateWithFormat:@"Word BEGINSWITH %@"]And as far as checking two predicates, you're looking for
NSCompoundPredicate.您需要创建要比较的所有谓词并将所有谓词附加到数组。之后，您可以使用
NSCompoundPredicate作为or、and条件。像那样
You need create all of the predicate which you want to compare and append all predicate to array. after that you can use
NSCompoundPredicateforor,andcondition.like that
http://developer.apple.com/ Library/ios/#documentation/Cocoa/Conceptual/Predicates/Articles/pCreating.html
在字符串常量、变量和字符串下查找“前缀”部分通配符部分。
http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/Predicates/Articles/pCreating.html
Look for the 'Prefix' part under the String Constants, Variables, and Wildcards section.