Comment changer la couleur de la UIAlertView dialogue dans iOS?

Utiliser Comme Cette

   [CustomAlert setBackgroundColor:[UIColor blueColor] 
    withStrokeColor:[UIColor greenColor]];

.h et .m Contenu du Fichier

CustomAlert.h

#import <UIKit/UIKit.h>

@interface CustomAlert : UIAlertView
{

}

+ (void) setBackgroundColor:(UIColor *) background 
    withStrokeColor:(UIColor *) stroke;

@end

CustomAlert.m

#import "CustomAlert.h"
@interface CustomAlert (Private)
- (void) drawRoundedRect:(CGRect) rect inContext:(CGContextRef) 
context withRadius:(CGFloat) radius;
@end
static UIColor *fillColor = nil;
static UIColor *borderColor = nil;
@implementation CustomAlert
+ (void) setBackgroundColor:(UIColor *) background 
withStrokeColor:(UIColor *) stroke
{
if(fillColor != nil)
{
[fillColor release];
[borderColor release];
}
fillColor = [background retain];
borderColor = [stroke retain];
}
- (id)initWithFrame:(CGRect)frame
{
if((self = [super initWithFrame:frame]))
{
if(fillColor == nil)
{
fillColor = [[UIColor blackColor] retain];
borderColor = [[UIColor colorWithHue:0.625 
saturation:0.0 brightness:0.8 alpha:0.8] 
retain];
}
}
return self;
}
- (void)layoutSubviews
{
for (UIView *sub in [self subviews])
{
if([sub class] == [UIImageView class] && sub.tag == 0)
{
//The alert background UIImageView tag is 0, 
//if you are adding your own UIImageView's 
//make sure your tags != 0 or this fix 
//will remove your UIImageView's as well!
[sub removeFromSuperview];
break;
}
}
}
- (void)drawRect:(CGRect)rect
{   
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextClearRect(context, rect);
CGContextSetAllowsAntialiasing(context, true);
CGContextSetLineWidth(context, 0.0);
CGContextSetAlpha(context, 0.8); 
CGContextSetLineWidth(context, 2.0);
CGContextSetStrokeColorWithColor(context, [borderColor CGColor]);
CGContextSetFillColorWithColor(context, [fillColor CGColor]);
//Draw background
CGFloat backOffset = 2;
CGRect backRect = CGRectMake(rect.origin.x + backOffset, 
rect.origin.y + backOffset, 
rect.size.width - backOffset*2, 
rect.size.height - backOffset*2);
[self drawRoundedRect:backRect inContext:context withRadius:8];
CGContextDrawPath(context, kCGPathFillStroke);
//Clip Context
CGRect clipRect = CGRectMake(backRect.origin.x + backOffset-1, 
backRect.origin.y + backOffset-1, 
backRect.size.width - (backOffset-1)*2, 
backRect.size.height - (backOffset-1)*2);
[self drawRoundedRect:clipRect inContext:context withRadius:8];
CGContextClip (context);
//Draw highlight
CGGradientRef glossGradient;
CGColorSpaceRef rgbColorspace;
size_t num_locations = 2;
CGFloat locations[2] = { 0.0, 1.0 };
CGFloat components[8] = { 1.0, 1.0, 1.0, 0.35, 1.0, 1.0, 1.0, 0.06 };
rgbColorspace = CGColorSpaceCreateDeviceRGB();
glossGradient = CGGradientCreateWithColorComponents(rgbColorspace, 
components, locations, num_locations);
CGRect ovalRect = CGRectMake(-130, -115, (rect.size.width*2), 
rect.size.width/2);
CGPoint start = CGPointMake(rect.origin.x, rect.origin.y);
CGPoint end = CGPointMake(rect.origin.x, rect.size.height/5);
CGContextSetAlpha(context, 1.0); 
CGContextAddEllipseInRect(context, ovalRect);
CGContextClip (context);
CGContextDrawLinearGradient(context, glossGradient, start, end, 0);
CGGradientRelease(glossGradient);
CGColorSpaceRelease(rgbColorspace); 
}
- (void) drawRoundedRect:(CGRect) rrect inContext:(CGContextRef) context 
withRadius:(CGFloat) radius
{
CGContextBeginPath (context);
CGFloat minx = CGRectGetMinX(rrect), midx = CGRectGetMidX(rrect), 
maxx = CGRectGetMaxX(rrect);
CGFloat miny = CGRectGetMinY(rrect), midy = CGRectGetMidY(rrect), 
maxy = CGRectGetMaxY(rrect);
CGContextMoveToPoint(context, minx, midy);
CGContextAddArcToPoint(context, minx, miny, midx, miny, radius);
CGContextAddArcToPoint(context, maxx, miny, maxx, midy, radius);
CGContextAddArcToPoint(context, maxx, maxy, midx, maxy, radius);
CGContextAddArcToPoint(context, minx, maxy, minx, midy, radius);
CGContextClosePath(context);
}
- (void)dealloc
{
[super dealloc];
}
@end

Vous avez à mettre en œuvre votre UIAlertView. Vous ne pouvez pas changer la couleur bleue par défaut.