labview中制作一个选项卡按钮设置好背景,放入进去的控件怎么才能不被覆盖
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参考技术A 首先在菜单栏上选择‘查看’,再选择‘工具选板’,再把‘设置颜色’改成你想要的颜色,然后点击你想要改变的控件。更改按钮的背景颜色
【中文标题】更改按钮的背景颜色【英文标题】:Change button's background colour 【发布时间】:2018-02-09 05:47:04 【问题描述】:我正在做一个项目,在该项目中,我为 UIButton 创建了一个子类,用于设置渐变背景颜色。它工作正常,但现在 ViewController 中有两个选项卡,假设 A 和 B 有两个按钮。我想更改颜色当我单击按钮 B 时,按钮 A 与选项卡功能相同:
UIButton 的子类:
// .h_file
#import <UIKit/UIKit.h>
IB_DESIGNABLE
@interface grediantButton : UIButton
@property(nonatomic)IBInspectable UIColor*topColor;
@property(nonatomic)IBInspectable UIColor*bottomColor;
@property(nonatomic)IBInspectable CGFloat cornerRadius;
- (void)customInit;
@end
// .m file
#import "grediantButton.h"
#import "UIColor+myColor.h"
@implementation grediantButton
- (instancetype)initWithFrame:(CGRect)frame
self = [super initWithFrame:frame];
if (self)
self.topColor = [UIColor clearColor];
self.bottomColor = [UIColor clearColor];
self.cornerRadius = 1;
[self customInit];
return self;
- (id)initWithCoder:(NSCoder *)aDecoder
self = [super initWithCoder:aDecoder];
if (self)
[self customInit];
return self;
- (void)drawRect:(CGRect)rect
[self customInit];
- (void)setNeedsLayout
[super setNeedsLayout];
[self setNeedsDisplay];
- (void)prepareForInterfaceBuilder
[self customInit];
- (void)customInit
self.layer.cornerRadius = self.cornerRadius;
CAGradientLayer *gradientLayer = [[CAGradientLayer alloc] init];
gradientLayer.frame = self.bounds;
gradientLayer.cornerRadius = self.cornerRadius;
gradientLayer.colors = [NSArray arrayWithObjects:(id)[self.topColor CGColor], (id)[self.bottomColor CGColor],nil];
[self.layer setMasksToBounds:YES];
[self.layer insertSublayer:gradientLayer atIndex:0];
我的 VC 代码:
#pragma mark:AddnewTownshipVC
- (IBAction)addnewTownShip:(id)sender
[self.addnewTwnBtn setTopColor:[UIColor getTabTopColor]];
[self.addnewTwnBtn setBottomColor:[UIColor getTabBotColor]];
[self.viewalltownBtn setTopColor:[UIColor blackColor]];
[self.viewalltownBtn setBottomColor:[UIColor blackColor]];
#pragma mark:viewalltownshipVC
- (IBAction)viewAllTownship:(id)sender
[self.addnewTwnBtn setTopColor:[UIColor blackColor]];
[self.addnewTwnBtn setBottomColor:[UIColor blackColor]];
[self.viewalltownBtn setTopColor:[UIColor getTabTopColor]];
[self.viewalltownBtn setBottomColor:[UIColor getTabBotColor]];
标签就像:
当我点击黑色的一个标签时会发生什么
【问题讨论】:
那是什么问题? 我无法更改代码“[self.addnewTwnBtn setTopColor:[UIColor blackColor]]; [self.addnewTwnBtn setBottomColor:[UIColor blackColor]];”中显示的颜色 很明显,只需将值传递给属性bottomColor
,它将如何设置颜色?你没有为此编写任何代码
为按钮选择状态设置金色和正常状态设置黑色做一件事。现在点击按钮只需更改sender.selected = !sender.selected
每次单击时都会调用此方法 - (void)customInit。我把所有的想法都放在里面。你可以查看上面的代码
【参考方案1】:
您应该为 UIButton 设置多个状态。 例如,为不同的状态设置不同的背景图片。
[button setBackgroundImage:naomalImage forState:UIControlStateNormal];
[button setBackgroundImage:selectedImage forState:UIControlStateSelected];
然后,只是控制状态。
- (IBAction)addnewTownShip:(id)sender
button.selected = YES;
...
【讨论】:
【参考方案2】:感谢大家的回复。 我通过更改我的 - (void)customInit 方法中的一些代码解决了我的问题
- (void)customInit
self.layer.cornerRadius = self.cornerRadius;
CAGradientLayer *gradientLayer = [[CAGradientLayer alloc] init];
gradientLayer.frame = self.bounds;
gradientLayer.cornerRadius = self.cornerRadius;
gradientLayer.colors = [NSArray arrayWithObjects:(id)[self.topColor CGColor], (id)[self.bottomColor CGColor],nil];
[self.layer setMasksToBounds:YES];
if([[self.layer sublayers] objectAtIndex:0])
[self.layer replaceSublayer:[[self.layer sublayers] objectAtIndex:0] with:gradientLayer];
else
[self.layer insertSublayer:gradientLayer atIndex:0];
并在
中调用此方法#pragma mark:AddnewTownshipVC
- (IBAction)addnewTownShip:(grediantButton*)sender
[sender setTopColor:[UIColor getTabTopColor]];
[sender setBottomColor:[UIColor getTabBotColor]];
[sender customInit];
[self.viewalltownBtn setTopColor:[UIColor blackColor]];
[self.viewalltownBtn setBottomColor:[UIColor blackColor]];
[self.viewalltownBtn customInit];
// sender.isSelected = true;
// self.viewalltownBtn.isSelected = false;
#pragma mark:viewalltownshipVC
- (IBAction)viewAllTownship:(grediantButton*)sender
[self.addnewTwnBtn setTopColor:[UIColor blackColor]];
[self.addnewTwnBtn setBottomColor:[UIColor blackColor]];
[self.addnewTwnBtn customInit];
[sender setTopColor:[UIColor getTabTopColor]];
[sender setBottomColor:[UIColor getTabBotColor]];
[sender customInit];
【讨论】:
【参考方案3】:只需转到故事板中的属性检查器,在它的底部看到有背景颜色,你可以用它来改变。
看这里:-
https://i.stack.imgur.com/A6ecY.png
【讨论】:
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