En caso de que esté haciendo un botón de retroceso personalizado basado en UIButton con imagen de flecha, aquí está el fragmento de subclase. Al usarlo, puede crear un botón en el código o simplemente asignar una clase en Interface Builder a cualquier UIButton. La imagen de la flecha hacia atrás se agregará automáticamente y se coloreará con color de texto.
@interface UIImage (TintColor)
- (UIImage *)imageWithOverlayColor:(UIColor *)color;
@end
@implementation UIImage (TintColor)
- (UIImage *)imageWithOverlayColor:(UIColor *)color
{
CGRect rect = CGRectMake(0.0f, 0.0f, self.size.width, self.size.height);
if (UIGraphicsBeginImageContextWithOptions) {
CGFloat imageScale = 1.0f;
if ([self respondsToSelector:@selector(scale)])
imageScale = self.scale;
UIGraphicsBeginImageContextWithOptions(self.size, NO, imageScale);
}
else {
UIGraphicsBeginImageContext(self.size);
}
[self drawInRect:rect];
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetBlendMode(context, kCGBlendModeSourceIn);
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
@end
#import "iOS7backButton.h"
@implementation iOS7BackButton
-(void)awakeFromNib
{
[super awakeFromNib];
BOOL is6=([[[UIDevice currentDevice] systemVersion] floatValue] <7);
UIImage *backBtnImage = [[UIImage imageNamed:@"backArrow"] imageWithOverlayColor:self.titleLabel.textColor];
[self setImage:backBtnImage forState:UIControlStateNormal];
[self setTitleEdgeInsets:UIEdgeInsetsMake(0, 5, 0, 0)];
[self setImageEdgeInsets:UIEdgeInsetsMake(0, is6?0:-10, 0, 0)];
}
+ (UIButton*) buttonWithTitle:(NSString*)btnTitle andTintColor:(UIColor*)color {
BOOL is6=([[[UIDevice currentDevice] systemVersion] floatValue] <7);
UIButton *backBtn=[[UIButton alloc] initWithFrame:CGRectMake(0, 0, 60, 30)];
UIImage *backBtnImage = [[UIImage imageNamed:@"backArrow"] imageWithOverlayColor:color];
[backBtn setImage:backBtnImage forState:UIControlStateNormal];
[backBtn setTitleEdgeInsets:UIEdgeInsetsMake(0, is6?5:-5, 0, 0)];
[backBtn setImageEdgeInsets:UIEdgeInsetsMake(0, is6?0:-10, 0, 0)];
[backBtn setTitle:btnTitle forState:UIControlStateNormal];
[backBtn setTitleColor:color /*#007aff*/ forState:UIControlStateNormal];
return backBtn;
}
@end