buttonWithType＋tintColorでボタンの背景色を変える

gistfile1.m

//
//  ViewController.m
//  121130
//
//  Created by changhwi on 12/11/30.
//  Copyright (c) 2012年 changhwi. All rights reserved.
//

#import "ViewController.h"

@interface ViewController()
@end

#pragma clang diagnostic ignored "-Wunused-value"

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view, typically from a nib.    
    
    float valueR = 0.0;
    float valueG = 1.0;
    float valueB = 1.0;
    float valueA = 1.0;

    UIButton *buttonRPlus = [UIButton buttonWithType:100];
	[buttonRPlus setTitle:@"R+" forState:UIControlStateNormal];
    //x, y, w, h
	buttonRPlus.frame = CGRectMake(20, 350, 70, 50);
    buttonRPlus.tintColor = [UIColor colorWithRed:1.0 green:0.0 blue:0.0 alpha:1.0];
	[self.view addSubview:buttonRPlus];
    
    UIButton *buttonRMinus = [UIButton buttonWithType:UIButtonTypeRoundedRect];
	[buttonRMinus setTitle:@"R-" forState:UIControlStateNormal];
	[buttonRMinus sizeToFit];
    //x, y, w, h
	buttonRMinus.frame = CGRectMake(20, 410, 70, 50);
	[self.view addSubview:buttonRMinus];
    
    UIButton *buttonGPlus = [UIButton buttonWithType:UIButtonTypeRoundedRect];
	[buttonGPlus setTitle:@"R+" forState:UIControlStateNormal];
	[buttonGPlus sizeToFit];
    //x, y, w, h
	buttonGPlus.frame = CGRectMake(100, 350, 70, 50);
	[self.view addSubview:buttonGPlus];
    
    UIButton *buttonGMinus = [UIButton buttonWithType:UIButtonTypeRoundedRect];
	[buttonGMinus setTitle:@"G-" forState:UIControlStateNormal];
	[buttonGMinus sizeToFit];
    //x, y, w, h
	buttonGMinus.frame = CGRectMake(100, 410, 70, 50);
	[self.view addSubview:buttonGMinus];
    
    
    UIButton *buttonBPlus = [UIButton buttonWithType:UIButtonTypeRoundedRect];
	[buttonBPlus setTitle:@"R+" forState:UIControlStateNormal];
	[buttonBPlus sizeToFit];
    //x, y, w, h
	buttonBPlus.frame = CGRectMake(180, 350, 70, 50);
	[self.view addSubview:buttonBPlus];
    
    UIButton *buttonBMinus = [UIButton buttonWithType:UIButtonTypeRoundedRect];
	[buttonBMinus setTitle:@"G-" forState:UIControlStateNormal];
	[buttonBMinus sizeToFit];
    //x, y, w, h
	buttonBMinus.frame = CGRectMake(180, 410, 70, 50);
	[self.view addSubview:buttonBMinus];
    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void)viewUpdate{
    if (valueR >= 1.0 || valueG >= 1.0 || valueB >= 1.0) {
        [UIView
         animateWithDuration:0.1
         animations:^{self.view.backgroundColor =
             [UIColor colorWithRed:valueR green:valueG blue:valueG alpha:1.0];}];
    }
    else{
        [UIView
         animateWithDuration:0.1
         animations:^{self.view.backgroundColor =
             [UIColor colorWithRed:valueR green:1.0 blue:1.0 alpha:1.0];}];
    }
}


@end