我正在尝试更改后退按钮箭头。
我目前使用以下代码来控制后退按钮的文本大小和颜色：
[[UIBarButtonItem appearance] setTitleTextAttributes:
[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor whiteColor], UITextAttributeTextColor,
[UIFont boldSystemFontOfSize:16.0f], UITextAttributeFont,
[UIColor darkGrayColor], UITextAttributeTextShadowColor,
[NSValue valueWithCGSize:CGSizeMake(0.0, -1.0)], UITextAttributeTextShadowOffset,
nil] forState:UIControlStateNormal];
但如果我只想为返回按钮更改箭头的颜色，该怎么办？
我必须同时使用以下两种方法：
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil]
setTitleTextAttributes:[NSDictionary
dictionaryWithObjectsAndKeys:[UIColor whiteColor], UITextAttributeTextColor,nil]
forState:UIControlStateNormal];
[[self.navigationController.navigationBar.subviews lastObject] setTintColor:[UIColor whiteColor]];
对我来说很有效，谢谢大家！
如果你正在基于UIButton创建带有箭头图像的自定义返回按钮，这里有一个子类片段。使用它，你可以在代码中创建按钮或者只是在Interface Builder中分配类到任何UIButton上。 后退箭头图像将自动添加并根据文本颜色着色。
@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
只需更改NavigationBar的颜色，您可以像下面这样设置色调颜色。
[[UINavigationBar appearance] setTintColor:[UIColor whiteColor]];
[[NSClassFromString(@"_UINavigationBarBackIndicatorView") appearance]
setTintColor:[UIColor colorWithHexString: @"#f00000"]];
在iOS 7中，您可以将以下代码行放置在AppDelegate.m文件中的application:didFinishLaunchingWithOptions:中：
[[UINavigationBar appearance] setTintColor:myColor];
将myColor设置为您希望整个应用程序中返回按钮的颜色。无需在每个文件中都设置。
Swift 2.0: 给导航栏和按钮上色
navigationController?.navigationBar.barTintColor = UIColor.blueColor()
navigationController?.navigationBar.tintColor = UIColor.whiteColor()
navigationController!.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.whiteColor()]
self.navigationController?.navigationBar.tintColor = UIColor.black
UINavigationBar的一些属性行为已经从 iOS 7 发生了改变。查看这个答案以了解其他属性的影响。 - Bhavin