iOS getting the value of key in dictionary incorrectly

tranvutuan · Feb 28, 2012

What I am having so far right now is

Code:

    NSArray *keys = [NSArray arrayWithObjects:@"firstName",@"lastName",@"phoneNumber",@"email",@"password",nil];

    NSArray *objects = [NSArray arrayWithObjects:@"nil",@"nil",@"nil",@"nil",@"abc",nil];

    dictionary = [NSDictionary dictionaryWithObject:objects forKey:keys];

    NSLog(@"pass is %@",[keys objectAtIndex:4]);

    NSLog(@"value of pass is%@",[dictionary objectForKey:@"password"]);

However, What I got from the debugger is

Code:

    pass is password

    value of pass is (null)

Can anyone explain why the value is null.It should be abc,shouldn't it.

OverByThere · Feb 28, 2012

I think you want dictionaryWithObjects rather dictionaryWithObject, here is the code that (for me) works:

Code:

NSArray *keys = [NSArray arrayWithObjects:@"firstName",@"lastName",@"phoneNumber",@"email",@"password",nil];
    
    NSArray *objects = [NSArray arrayWithObjects:@"nil",@"nil",@"nil",@"nil",@"abc",nil];
    
    NSDictionary *dictionary = [[NSDictionary alloc] init];
    
    dictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys];
    
    NSLog(@"pass is %@",[keys objectAtIndex:4]);
    
    NSLog(@"value of pass is%@",[dictionary objectForKey:@"password"]);

Note I have initialised the Array in this version just so I can test it, you can remove that line.

tranvutuan · Feb 28, 2012

OverByThere said:
I think you want dictionaryWithObjects rather dictionaryWithObject, here is the code that (for me) works:

Code:

NSArray *keys = [NSArray arrayWithObjects:@"firstName",@"lastName",@"phoneNumber",@"email",@"password",nil]; NSArray *objects = [NSArray arrayWithObjects:@"nil",@"nil",@"nil",@"nil",@"abc",nil]; NSDictionary *dictionary = [[NSDictionary alloc] init]; dictionary = [NSDictionary dictionaryWithObjects:objects forKeys:keys]; NSLog(@"pass is %@",[keys objectAtIndex:4]); NSLog(@"value of pass is%@",[dictionary objectForKey:@"password"]);

Note I have initialised the Array in this version just so I can test it, you can remove that line.

thanks for your help, i just tried and it worked

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iOS getting the value of key in dictionary incorrectly

tranvutuan

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OverByThere

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tranvutuan

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