all Keys and Objects from a NSDictionary to a NSString - objective-c

Question

I've got a NSDictionary and I'd like put all of it's objects and keys into a NSString, so that I can finally display them in a label like this:
key1: object1
key2: object2
key3: object3
... ...
Any ideas?

Answer 1

Build the string and then set it to the labels text.
NSMutableString *myString = [[NSMutableString alloc] init];
[dictionary enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
[myString appendFormat:#"%# : %#\n", key, obj];
}];
self.label.text = myString;
Note
The docs (String Programming Guide) for the %# format specifier state:
%#
Objective-C object, printed as the string returned by descriptionWithLocale: if available, or description otherwise. Also works with CFTypeRef objects, returning the result of the CFCopyDescription function.
So if these are your own custom objects in the dictionary you will most likely need to override the description method to provide more meaningful output
Update
You mention that you need your output sorted by keys - dictionaries are not ordered so you will have to do it differently - this example assumes that your keys are strings
NSArray *sortedKeys = [[dictionary allKeys] sortedArrayUsingSelector:#selector(caseInsensitiveCompare:)];
NSMutableString *myString = [[NSMutableString alloc] init];
for (NSString *key in sortedKeys) {
[myString appendFormat:#"%# : %#\n", key, [dictionary objectForKey:key]];
}
self.label.text = myString;

Answer 2

try this
for(id key in [dictionary allKeys])
{
id value = [dictionary objectForKey:key];
NSLog(#"%# : %#", key, value);
}

Answer 3

NSString *row;
for (id key in dictionary) {
row = [NSString stringWithFormat:"%#: %#", key, [dictionary objectForKey:key]];
// do something with your row string
}

Answer 4

Iam trying to append two time values from my TCTime object and display in label, even though I added "\n" towards the end it is printing only the first value but not the second value.
_feedTimes is NSArray.
NSMutableString *myString = [[NSMutableString alloc] init];
TCTime *time = _feedTimes[indexPath.row];
[myString appendFormat:#"%s : %#\n", "Time 1 ", time.Time1];
[myString appendFormat:#"%s : %#\n", "Time 2 ", time.Time2];
self.label.text = myString;