iOS 7 Messages Gradient Experimentation

UIViewController.m

//
//  NRTRootViewController.m
//  GradientTableView
//
//  Created by Rick Harrison on 8/15/13.
//  Copyright (c) 2013 Rick Harrison. All rights reserved.
//

#import "NRTRootViewController.h"

@interface NRTRootViewController () <UITableViewDataSource, UITableViewDelegate>

@end

@implementation NRTRootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {
        
    }
    
    return self;
}

- (void)loadView {
    UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
    
    UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"gradient"]];
    imageView.frame = CGRectMake(0, 0, 320, 568);
    
    UITableView *tableView = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStylePlain];
    tableView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    tableView.backgroundColor = [UIColor clearColor];
    tableView.dataSource = self;
    tableView.delegate = self;
    tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
    
    [view addSubview:imageView];
    [view addSubview:tableView];
    
    self.view = view;
}

- (void)viewDidLoad {
    [super viewDidLoad];
}

#pragma mark -
#pragma mark Table View Data Source

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return 100;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *identifier = @"Identifier";
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
        cell.backgroundColor = [UIColor clearColor];
        
        UIView *backgroundView = [[UIView alloc] initWithFrame:cell.contentView.bounds];
        backgroundView.backgroundColor = [UIColor whiteColor];
        
        /*
         * Draw layer mask for the background
         */
        
        UIGraphicsBeginImageContextWithOptions(backgroundView.bounds.size, NO, 0.0);
        CGContextRef ctx = UIGraphicsGetCurrentContext();
        
        if (ctx) {
            CGContextSetFillColorWithColor(ctx, [UIColor whiteColor].CGColor);
            CGContextFillRect(ctx, CGRectMake(0.0, 0.0, 100.0, backgroundView.bounds.size.height));
            
            CGContextSetFillColorWithColor(ctx, [UIColor whiteColor].CGColor);
            CGContextFillRect(ctx, CGRectMake(100.0, 0.0, 100.0, 10.0));
            
            CGContextSetFillColorWithColor(ctx, [UIColor whiteColor].CGColor);
            CGContextFillRect(ctx, CGRectMake(100.0, backgroundView.bounds.size.height - 10.0, 100.0, 10.0));
            
            CGContextSetFillColorWithColor(ctx, [UIColor clearColor].CGColor);
            CGContextFillRect(ctx, CGRectMake(100.0, 10.0, 100.0, backgroundView.bounds.size.height - 20));
            
            CGContextSetFillColorWithColor(ctx, [UIColor whiteColor].CGColor);
            CGContextFillRect(ctx, CGRectMake(200.0, 0.0, 120.0, backgroundView.bounds.size.height));
            
            UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
            UIGraphicsEndImageContext();
            
            [backgroundView addSubview:[[UIImageView alloc] initWithImage:image]];
            
            CALayer *mask = [CALayer layer];
            mask.contents = (id)image.CGImage;
            mask.frame = backgroundView.bounds;
            [backgroundView.layer setMask:mask];
        }
        
        /*
         * Add the subviews to the tree
         */
        
        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100.0, 10.0, 100.0, 24.0)];
        label.font = [UIFont systemFontOfSize:13.0];
        label.textAlignment = NSTextAlignmentCenter;
        label.textColor = [UIColor whiteColor];
        label.text = @"Hi Matt";
        
        [cell.contentView addSubview:backgroundView];
        [cell.contentView addSubview:label];
    }
    
    return cell;
}

#pragma mark -

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

@end