Stay weird. Stay different.

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IOS开发Tips

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记录下平时写代码中遇到的各种需求的解决方案，方便以后查看。算是把GitHub当成云笔记了。

  • navigationBar的隐藏

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    - (void)viewWillAppear:(BOOL)animated {
    	[super viewWillAppear:animated];

    	[self.navigationController setNavigationBarHidden:YES animated:animated];
    }
    - (void)viewWillDisappear:(BOOL)animated {
    	[super viewWillDisappear:animated];

    	[self.navigationController 	setNavigationBarHidden:NO animated:animated];
    }

  • 设置cell分割线

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    - (void)drawRect:(CGRect)rect {
        	[super drawRect:rect];
        	CGContextRef context = UIGraphicsGetCurrentContext();
        	CGContextSetFillColorWithColor(context, [UIColor clearColor].CGColor);
        	CGContextFillRect(context, rect);
        	//上分割线
        	CGContextSetStrokeColorWithColor(context, [UIColor lightGrayColor].CGColor);
        	CGContextStrokeRect(context, CGRectMake(0, -4, rect.size.width, 4));
        	//下分割线
        	CGContextSetStrokeColorWithColor(context, [UIColor lightGrayColor].CGColor);
        	CGContextStrokeRect(context, CGRectMake(0, -4, rect.size.width, 4));
    }

  • tableView添加pan手势

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    - (BOOL)gestureRecognizerShouldBegin:(UIPanGestureRecognizer *)gestureRecognizer
    {
       	UIView *gestureView = [gestureRecognizer view];
       	CGPoint translation = [gestureRecognizer translationInView:[gestureView superview]];


       	// Check for horizontal gesture
       	if (fabsf(translation.x) > fabsf(translation.y))
       	{
           	return YES;
       	}


       	return NO;
    }

  • tableView手势冲突

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    - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch 	{
    	if ([touch.view isDescendantOfView:autocompleteTableView]) {
    		return NO;
    	}
    	return YES;
    }

  • 去掉tableView底部空白

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    [tableView setTableFooterView:[[UIView alloc] initWithFrame:CGRectZero]];

  • tableViewCell分割线顶头显示

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    static void setLastCellSeperatorToLeft(UITableViewCell* cell)
    {
       	if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {
           	[cell setSeparatorInset:UIEdgeInsetsZero];
       	}

       	if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
           	[cell setLayoutMargins:UIEdgeInsetsZero];
       	}

       	if([cell respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)]){
           	[cell setPreservesSuperviewLayoutMargins:NO];
       	}

    }

  • cocoapods不更新本地库install

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    pod install --verbose --no-repo-update
    pod update --verbose --no-repo-update

  • button setBackGroundImage和setImage的区别

    1. setBackGroundImage会把图片拉伸
    2. setImage依然按照源比例显示图片