iOS开发OC开发Object-C 开发实用随笔

1. 设置button文字左面 图片右面

- (void) setEdgeSet:(UIButton *)btn{
    CGFloat labelWidth = [btn.titleLabel.text sizeWithAttributes:@{NSFontAttributeName:btn.titleLabel.font}].width;
    ;
    [btn setTitleEdgeInsets:UIEdgeInsetsMake(0, -12, 0, 12)];
    [btn setImageEdgeInsets:UIEdgeInsetsMake(0, labelWidth  +3 , 0, -labelWidth -3)];
}

 btn.imageEdgeInsets = UIEdgeInsetsMake(0, btn.frame.size.width - btn.imageView.frame.origin.x - btn.imageView.frame.size.width, 0, 0);
 btn.titleEdgeInsets = UIEdgeInsetsMake(0, -(btn.frame.size.width - btn.imageView.frame.size.width ), 0, 0);

2.git 忽略文件

git config --global core.excludesfile ~/.gitignore
echo .DS_Store >> ~/.gitignore

3.设置UITabbar 选中颜色

  self.tabBar.unselectedItemTintColor = HEXCOLOR(0x393f53);
  self.tabBar.selectedImageTintColor = HEXCOLOR(0x009bbd);
 [[UITabBarItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:HEXCOLOR(0x393f53)} forState:UIControlStateNormal];
 [[UITabBarItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:HEXCOLOR(0x009bbd)} forState:UIControlStateSelected];
    

4. 同时设置阴影和圆角

/*
 周边加阴影，并且同时圆角
 */
- (void)addShadowToView:(UIView *)view
            withOpacity:(float)shadowOpacity
           shadowRadius:(CGFloat)shadowRadius
        andCornerRadius:(CGFloat)cornerRadius
{
     shadow /
    CALayer *shadowLayer = [CALayer layer];
    shadowLayer.frame = view.layer.frame;
    
    shadowLayer.shadowColor = [UIColor blackColor].CGColor;//shadowColor阴影颜色
    shadowLayer.shadowOffset = CGSizeMake(0, 0);//shadowOffset阴影偏移，默认(0, -3),这个跟shadowRadius配合使用
    shadowLayer.shadowOpacity = shadowOpacity;//0.8;//阴影透明度，默认0
    shadowLayer.shadowRadius = shadowRadius;//8;//阴影半径，默认3
    
    //路径阴影
    UIBezierPath *path = [UIBezierPath bezierPath];
    
    float width = shadowLayer.bounds.size.width;
    float height = shadowLayer.bounds.size.height;
    float x = shadowLayer.bounds.origin.x;
    float y = shadowLayer.bounds.origin.y;
    
    CGPoint topLeft      = shadowLayer.bounds.origin;
    CGPoint topRight     = CGPointMake(x + width, y);
    CGPoint bottomRight  = CGPointMake(x + width, y + height);
    CGPoint bottomLeft   = CGPointMake(x, y + height);
    
    CGFloat offset = -1.f;
    [path moveToPoint:CGPointMake(topLeft.x - offset, topLeft.y + cornerRadius)];
    [path addArcWithCenter:CGPointMake(topLeft.x + cornerRadius, topLeft.y + cornerRadius) radius:(cornerRadius + offset) startAngle:M_PI endAngle:M_PI_2 * 3 clockwise:YES];
    [path addLineToPoint:CGPointMake(topRight.x - cornerRadius, topRight.y - offset)];
    [path addArcWithCenter:CGPointMake(topRight.x - cornerRadius, topRight.y + cornerRadius) radius:(cornerRadius + offset) startAngle:M_PI_2 * 3 endAngle:M_PI * 2 clockwise:YES];
    [path addLineToPoint:CGPointMake(bottomRight.x + offset, bottomRight.y - cornerRadius)];
    [path addArcWithCenter:CGPointMake(bottomRight.x - cornerRadius, bottomRight.y - cornerRadius) radius:(cornerRadius + offset) startAngle:0 endAngle:M_PI_2 clockwise:YES];
    [path addLineToPoint:CGPointMake(bottomLeft.x + cornerRadius, bottomLeft.y + offset)];
    [path addArcWithCenter:CGPointMake(bottomLeft.x + cornerRadius, bottomLeft.y - cornerRadius) radius:(cornerRadius + offset) startAngle:M_PI_2 endAngle:M_PI clockwise:YES];
    [path addLineToPoint:CGPointMake(topLeft.x - offset, topLeft.y + cornerRadius)];
    
    //设置阴影路径
    shadowLayer.shadowPath = path.CGPath;
    
     cornerRadius /
    view.layer.cornerRadius = cornerRadius;
    view.layer.masksToBounds = YES;
    view.layer.shouldRasterize = YES;
    view.layer.rasterizationScale = [UIScreen mainScreen].scale;
    
    [view.superview.layer insertSublayer:shadowLayer below:view.layer];
}

5. 设置导航title,去导航下方阴影

    [self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName : K333Color, NSFontAttributeName : UIFont(18)}];
    
    [self.navigationController.navigationBar setShadowImage: [self createImageWithColor:HEXCOLOR(0xe4e4e4)]];
    
    - (UIImage *)createImageWithColor:(UIColor *)color {
    CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 0.5f);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);
    
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return image;
}

6. 移除所有subviews

[self.view.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];

7. 返回指定特定viewcontroller

for (UIViewController *temp in self.navigationController.viewControllers) {
            if ([temp isKindOfClass:[UpdateUserViewController class]]) {
                [self.navigationController popToViewController:temp animated:YES];
            }
 }