Objective C snippets

AMTextField

// .h file
#import <UIKit/UIKit.h>
@interface AMTextField : UITextField
@property (nonatomic, assign) UIEdgeInsets edgeInsets;
@end


// .m file
#import "AMTextField.h"

@implementation AMTextField

- (id)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
        self.edgeInsets = UIEdgeInsetsMake(10, 40, 10, 10);
    }
    return self;
}

-(id)initWithCoder:(NSCoder *)aDecoder{
    self = [super initWithCoder:aDecoder];
    if(self){
        self.edgeInsets = UIEdgeInsetsMake(10, 40, 10, 10);
    }
    return self;
}

- (CGRect)textRectForBounds:(CGRect)bounds {
    return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, self.edgeInsets)];
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    return [super editingRectForBounds:UIEdgeInsetsInsetRect(bounds, self.edgeInsets)];
}

@end

Appearance UITextField

// Change general appearance
[[UITextField appearance] setTintColor:[UIColor colorWithHexString:GREEN_COLOR]];

// Change specific element.
[[self.inputTextField valueForKey:@"textInputTraits"] setValue:[UIColor redColor] forKey:@"insertionPointColor"];

CLLocationManager

/**
Add key NSLocationWhenInUseUsageDescription or NSLocationAlwaysUsageDescription 
(background GPS use) with string asking to use GPS on each info.plist from each target.
*/

[locationManager startUpdatingLocation];
[locationManager requestWhenInUseAuthorization];
if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
  [self.locationManager requestAlwaysAuthorization];
}

UIActionSheet_example

UIActionSheet *as = [[UIActionSheet alloc] initWithTitle:@"Title of view:"
                                                    delegate:self
                                           cancelButtonTitle:@"Cancel"
                                      destructiveButtonTitle:nil otherButtonTitles:nil];
    
[as addButtonWithTitle:@"Op1"];
[as addButtonWithTitle:@"Op2"];
[as showInView:self.view.window];


// Delegate....
// UIActionSheetDelegate
// - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex;