I am giving leading align constraint for two label. When text in both the lebel is same both liked aligned properly. But if text is different they don't look aligned (Difference of 1 Pixel is coming), is there any constraint, that work independently of text.??
Related
I have designed two labels side by side i have given left side label 150 fixed width, why alternatively getting below warning.
For above image left label i have given constant text and constraints like below
fixed width = 150, top = 10, leading = 10 , height = 30
for right label text will come from json and constraints like below
top = 10, leading = 10, trailing = 10, height = 30
i have highlighted all my left side fixed width labels, here for all labels i got below warning
Main.storyboard Fixed width constraints may cause clipping
but here if i select first label warning and if give greater then or equal and horizontal hugging from 251 to 250 then warning disappears.. like same if i do for second label then it becomes big like below
for third label if i give greater then or equal then warning disappears.. like alternatively warning disappears why, you can see that in top image. why its happening like this, how to clear all my warnings. please help me.
1.Give the left sided labels horizontal content hugging priority of 252.
2.Give the right sided labels horizontal content hugging priority of 251.
3.Give horizontal spacing of 8 between the left sided and right sided labels.
4.Remove fixed widths for all labels.
5.Align leading and trailing of all the left sided labels and just the trailing of all the right sided labels.
6.Give vertical space to left sided label from right sided label of the previous row.
7.Vertically center align the left sided and right sided label in the same row.
All your warnings will disappear.
In my app for iOS 8, I have a UISegmentedControl that stretches to fit the width of the device's screen. So on an iPad it's more pixels wide than it is on an iPhone 6+, which is more pixels wide than the iPhone 6, etc.
Centered just beneath each segment of the UISegmentedControl, I have a UILabel. So there are 5 segments and 5 UILabels. Each UILabel has a fixed width (fixed by constraint). However if the display size increases they become uncentered.
How in Interface Builder can I specify a constraint that will force each UILabel to become centered beneath each segment? I would be happy if I could just get the elements to remain proportionally spaced with each other as the display size scales, but I can't figure out how to do that, either.
All I can seemingly do is to center the middle UILabel directly under the middle segment by specifying a Center X Alignment between that and the UISegmentedControl.
I specified a Horizontal Space constraint between all the UILabels, and between the outer UILabels and the edges of the view, and set all these to "greater than or equals". They all have the same priority, but strangely, they don't all scale proportionally to each other.
The resulting problem is that the amount of Horizontal Space between each of the UILabels does not scale smoothly as the width of the device's screen increases. If I align everything to be in the proper positions on the iPhone 5S width of screen, then on the iPad their alignment is all wonky, and only the middle one lines up with its segment. The rest of them are all off center.
It appears that there is no way to specify a percentage of the over-all display width as a constraint -- you can only specify things in terms of pixels. Really?!?!
Clearly I could make the width of the objects to be flexible, but because they are text labels with right-aligned text, that screws everything up.
Surely I'm missing something here... since the point of Auto Layout is to make your interface scale according to the screen size, surely there is a way to specify a constraint as a percentage of any given view or subview... surely!!! But how? I've read the documentation and I cannot, for the life of me, figure it out.
BTW I did see that in the past, people have used crude hacks like spacer views or multiple sets of constraints, but surely those are outdated answers, and I'm just overlooking something extraordinarily obvious... right?
You can do this by making the centerX constraint of your labels equal to the superview.trailing times 0.1, 0.3, 0.5, 0.7, and 0.9 with constants of 0. To make these constraints, add your 5 labels to the view. Give the left most one a vertical spacing constraint to the segmented control. Select all 5 labels and give give them a "vertical centers" alignment constraint. Now control-drag from each label to the right side of the screen, and select the "Trailing space to container margin" constraint. Edit each one of these trailing constraints to look like this (except for the multiplier that needs to be given the values I mentioned above):
You'll have to reverse the first and second item (which you do from the pull down on the first item), change the Label.trailing to Label.Center X, and uncheck the "relative to margin" box, then correct the constant and multiplier values.
This approach will only work if the segmented control stretches all the way across the screen with no padding to the edges. If you want padding to the edges, then you need to use a completely different approach. You would need to create 5 UIViews below your segmented control -- align the left edge of the left-most one to the left edge of the segmented control. Align the right edge of the right-most one to the right edge of the segmented control. Give the 5 views equal width, and 0 length horizontal spacing constraint from each to its neighbor. This will give you 5 views that mimic the segmented control in width, with each view being the same width as one of the segments (assuming all the segments are the same width -- if that's not the case, you're screwed). Then you only need to add your labels as subviews of these 5 views, and give them centerX and centerY constraints.
here some points about using autolayout that I don't understand.
1/ I have set a constraint on the leading space and the trailing space of a label (so the horizontal size of the label should be adjusted automatically) but the label fit the size of the text. How to not autosize the label (I have seen hundreds of posts about autofit a label but nothing about not autofit).
2/ Concerning my UIScrollview, I have set up trailing space and leading space to 0 (so it should fit all the screen whatever the iPhone display size) but some margins still appears. Why ?
Thanks for your help.
As seen on the screenshot above, each top cell has few labels. The frame of the label this question concerning is highlighted with green rectangle. It shows the title of some picture/sculpture or other exhibit, so there could be quite long strings.
I would like the text of this label to be just above author label (string with font of smaller size). So, normal text is aligned from top to bottom and if text is not enough to fill all the space, the gap is at the bottom part of the label.
For this label I would like to use the opposite approach: if text is not enough, all the text at the bottom. Is there any parameter of UILabel to implement above mentioned behaviour? Or I should manually count the amount of lines and adjust the size of the label?
This is fairly easy using constraints. To get the effect you desire:
Constrain your label's position above the author label
Constrain the label's width or horizontal position
Constrain the label to a reasonable height using a greater than or equal to
Either constrain the label's total height as less than or equal to, or constrain the vertical position to something greater than or equal to.
All these constraints can be added in IB very easily, or through code. These constraints will cause the label to grow vertically to accommodate more text, and then shrink back down with less text, which will achieve the effect of having the text grow up from the bottom.
Suppose I have a view that contains two columns of objects. The first column contains labels, and the second column contains, say, sliders. I want the sliders all to align left with each other. I want the labels all to align left with each other. The trick is, how can I set the spacing between the labels and sliders so that the default spacing is used between the left sliders and the longest label, thus:
label 1 slider 1
label 2 slider 2
longer label 3 slider 3
very long label 4[]slider 4
label 5 slider 5
I've placed square brackets, [], where the default spacing should be. Is it possible to add this sort of constraint in the storyboard (iOS 7)? If so, how? The trick is that I don't know which label is the longest, especially with localization.
Ideally, I could specify a bounding box around the labels and align the sliders with the right side of the bounding box.
Yes, you can do this in IB. All the labels should have their left edges aligned, and one of them should have a fixed space to the left edge of their superview (all the elements should be enclosed in a UIView). Similarly, the sliders would have their right edges aligned and one of them would have a fixed space to the right edge of the box. Give one of the labels a horizontal spacing constraint to a slider -- make that a short one, say ==8 with a priority of 900 (that's the important thing). Now, give all the labels a >= constraint with whatever value you want for the minimum spacing (and leave the priority at 1000).