使用NSPredicate iOS在具有NSString的NSArray的NSArray中查找值 [英] Find values in NSArray having NSArray with NSString using NSPredicate iOS

问题描述

使用 NSArray 只有我能找到以下值：

With NSArray only i can find values as:

NSArray *arr = [NSArray arrayWithObjects:@"299-1-1", @"299-2-1", @"299-3-1", @"399-1-1", @"399-2-1", @"399-3-1", @"499-1-1", @"499-2-1", @"499-3-1", nil];
NSString *search = @"299";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS %@",[NSString stringWithFormat:@"%@", search]];
NSArray *array = [arr filteredArrayUsingPredicate: predicate];
NSLog(@"result: %@", array);

找到结果按预期方式：

 result: (
 "299-1-1",
 "299-2-1",
 "299-3-1"
 )

但 NSArray NSArray ， NSString

NSArray *arr = [NSArray arrayWithObjects:[NSArray arrayWithObjects:@"299-1-1", nil],[NSArray arrayWithObjects:@"399-1-1", nil],[NSArray arrayWithObjects:@"499-1-1", nil], nil];

什么是谓词语法这里？

推荐答案

要在嵌套数组中搜索，可以在谓词中使用ANY运算符：

To search in a nested array, you can use the "ANY" operator in the predicate:

NSArray *arr = [NSArray arrayWithObjects:[NSArray arrayWithObjects:@"299-1-1", nil],[NSArray arrayWithObjects:@"399-1-1", nil],[NSArray arrayWithObjects:@"499-1-1", nil], nil];
NSString *search = @"299";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"ANY SELF CONTAINS %@", search];
NSArray *array = [arr filteredArrayUsingPredicate: predicate];
NSLog(@"result: %@", array);

输出：

(
    (
        "299-1-1"
    )
)

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