#Variables
###Constants
#define WEATHER_API_URL @"http://warm-wildwood-5296.herokuapp.com/"
NSLog(@"%@", WEATHER_API_URL);###String
NSString *firstName = @"Scott";
NSString *lastName = @"Doxey";
NSString *fullname = [NSString stringWithFormat:@"%@ %@", firstName, lastName];
NSLog(@"%@", fullname);###Number
NSNumber *age = @29;
NSLog(@"%@", age);###Unsigned Integer
NSUInteger age = [@29 unsignedIntegerValue];
NSLog(@"%lu", (unsigned long)age);###Array
NSArray *apps = @[@"Pages", @"Numbers", @"Keynote"];
NSLog(@"%@", apps);###Dictionary
NSDictionary *user = @{@"First Name": @"Scott", @"Last Name": @"Doxey"};
NSLog(@"%@", user);###Log Object Type
NSDictionary *user = @{@"First Name": @"Scott", @"Last Name": @"Doxey"};
NSLog(@"%@", [user class]);###Log NSDictionary Keys
NSDictionary *user = @{@"First Name": @"Scott", @"Last Name": @"Doxey"};
NSLog(@"%@", [user allKeys]);###Log NSDictionary Values
NSDictionary *user = @{@"First Name": @"Scott", @"Last Name": @"Doxey"};
NSLog(@"%@", [user allValues]);###URL
// ViewController.m
@interface ViewController ()
{
NSMutableData *responseData;
}
@end
@implementation ViewController
- (void)viewDidLoad
{
NSURL *weatherAPIURL = [NSURL URLWithString:@"http://warm-wildwood-5296.herokuapp.com/"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:weatherAPIURL];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
responseData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[responseData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError *error;
NSDictionary *cities = [NSJSONSerialization JSONObjectWithData:responseData options:0 error:&error];
for (NSDictionary *city in cities) {
NSLog(@"%@", city);
}
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
@end###ENUM
typedef NS_ENUM(NSInteger, DayOfWeek) {
DayOfWeekMonday = 1,
DayOfWeekTuesday = 2,
DayOfWeekWednesday = 3,
DayOfWeekThursday = 4,
DayOfWeekFriday = 5,
DayOfWeekSaturday = 6,
DayOfWeekSunday = 7
};
NSLog(@"%ld", (long)DayOfWeekMonday);###Empty Variables
NSString *emptyString = [NSString string];
NSArray *emptyArray = [NSArray array];
NSDictionary *emptyDict = [NSDictionary dictionary];###Copying Variables
NSString *firstName = @"Scott";
NSString *otherString = [NSString stringWithString:firstName];
NSString *copy = [[NSString alloc] initWithString:otherString];
NSLog(@"%@", otherString);
NSLog(@"%@", copy);