グラデーションをラップした (My Graduation Tips.)

かなり面倒くさかったので、

#import "Paint.h"

@implementation Paint
{
    CAGradientLayer *grad;
}

-(id)init
{
    self = [super init];
    grad = [CAGradientLayer layer];
    return self;
    
    
}


-(void)gradWith:(UIView *)target from:(UIColor *)c1 to:(UIColor *)c2
{
    // if grad already exist then remove this. 
    if (grad){ 
        [grad removeFromSuperlayer];
    }
    
    
    grad.frame = target.bounds;
    
    grad.colors = [NSArray arrayWithObjects:
                       (id)c1.CGColor,
                       (id)c2.CGColor,
                       nil];
    [target.layer insertSublayer:grad atIndex:0];
    
}

-(void)gradWith:(UIView *)target by:(NSMutableArray *)colors
{
    if (grad){
        [grad removeFromSuperlayer];
    }
    
    grad.frame = target.bounds;
    
    NSMutableArray *res = [NSMutableArray array];
    for (id color in (NSMutableArray *)colors){
        [res addObject:(id)[color CGColor]];
    }
    
    grad.colors = [NSArray arrayWithArray:res];
    [target.layer insertSublayer:grad atIndex:0];
    
}

こんなふうなクラスを書いて、

        [paint gradWith:_paintedLabel by:[NSArray arrayWithObjects:[UIColor redColor],[UIColor yellowColor], nil]];

[paint gradWith:_paintedLabel from:[UIColor colorWithRed:0.0 green:0.3 blue:1.0 alpha:1.0] to:[UIColor colorWithRed:0.0 green:0.7 blue:0.933 alpha:1.0]];

こんなふうに呼び出すようにしてみた。やっつけだけど、頑張って働いてくれています。