如何以最快的方式检查我的 nsarray 是否包含另一个 nsarray 元素 IOS

Question

我看过很多答案，但没有得到我的答案。所以这就是为什么我决定发布一个问题。如果有人能找到有用的链接或答案将很有帮助。 这是我的字典数组：

<__NSArrayM 0x283ba04e0>(
{
    failvalues =     (
        "Check 1"
    );
    fieldname = "Check 3";
    fieldvalue =     (
        "Check 1",
        "Check 2"
    );
    showtype = mandatory;
    tagvalue = 0;
},
{
    failvalues =     (
        Fail
    );
    fieldname = "Dropdown 3";
    fieldvalue =     (
        Fail
    );
    showtype = mandatory;
    tagvalue = 1;
},
{
    failvalues =     (
        "Check 1",
        "Check 4"
    );
    fieldname = "Check 4";
    fieldvalue =     (
        "Check 1",
        "Check 2"
    );
    showtype = mandatory;
    tagvalue = 2;
})  

所以我想检查字段值是否包含失败值。 以下是我尝试过但似乎不起作用的代码：

for (int i = 0; i< [arrFields count]; i++) {
            if ([[[arrFields objectAtIndex:i]objectForKey:@"failvalues"] isKindOfClass:[NSArray class]]) {
                if (![[[[arrFields objectAtIndex:i] objectForKey:@"failvalues"] objectAtIndex:0] isEqualToString:@""]) {
                    NSLog(@"Field Values %@",[[arrFields objectAtIndex:i]objectForKey:@"fieldvalue"]);
                   NSArray *failValues = [[arrFields objectAtIndex:i] objectForKey:@"failvalues"];
                    for (int j = 0; j < [failValues count]; j++) {
                        if ([failValues containsObject:[[arrFields objectAtIndex:i]objectForKey:@"fieldvalue"]]) {
                            NSLog(@"Contains %@",[[arrFields objectAtIndex:i]objectForKey:@"fieldvalue"]);
                        } else {
                            NSLog(@"No fail values");
                        }
                    }
                } else {
                    NSLog(@"No Fail Fields");
                }
            } else {
                NSLog(@"Not an array");
            }
        }  

编辑：
这个我试过了，但是如何打破这两个循环

for (int i = 0; i< [arrFields count]; i++) {
            NSArray *fieldValues = [[arrFields objectAtIndex:i]objectForKey:@"fieldvalue"];
            NSArray *failValues = [[arrFields objectAtIndex:i] objectForKey:@"failvalues"];
                if (![[[[arrFields objectAtIndex:i] objectForKey:@"failvalues"] objectAtIndex:0] isEqualToString:@""]) {
                    //NSLog(@"Field Values %@",[[arrFields objectAtIndex:i]objectForKey:@"fieldvalue"]);
                    for(NSString *value in fieldValues){
                        if ([failValues containsObject:value]) {
                            NSLog(@"Contains %@",value);
                            scanStatus = TRUE;
                            return;
                        }
                    }
                } else {
                    NSLog(@"No Fail Fields");
                }
        }

提前致谢！

Answer 1

对于令人恐惧的goto，这是一个经典的用例。众所周知，goto 可以创建灾难性的混乱代码，但在这种情况下，它会让事情变得更干净。您必须知道何时使用 goto，并且一定要谨慎使用它。但这是我编写代码的方式：

    BOOL found = NO;
    for (NSDictionary *dict in arrFields)
    {
        NSArray *fieldValues = dict[@"fieldvalue"];
        NSArray *failValues = dict[@"failvalues"];
        if (![failValues[0] isEqualToString:@""]) {
            for (NSString *value in fieldValue) {
                if ([failValues containsObject:value]) {
                    NSLog(@"Contains %@",value);
                    found = YES;
                    goto leaveLoops;
                }
            }
        }
    }
leaveLoops:
    if (found) NSLog(@"Found one.");
    else NSLog(@"Didn't find one.");

如果你不能让自己使用 goto（你不会孤单），这里有一个 gotoless 替代方案：

    BOOL found = NO;
    for (NSDictionary *dict in arrFields)
    {
        NSArray *fieldValues = dict[@"fieldvalue"];
        NSArray *failValues = dict[@"failvalues"];
        if (![failValues[0] isEqualToString:@""]) {
            for (NSString *value in fieldValue) {
                if ([failValues containsObject:value]) {
                    NSLog(@"Contains %@",value);
                    found = YES;
                    break;
                }
            }
            if (found) break;
        }
    }
    
    if (found) NSLog(@"Found one.");
    else NSLog(@"Didn't find one.");