CODEWITHSUNDEEP
iosswiftcgpoint
user3746428
user3746428

Reputation: 11175

Trying to create circular progress bar in Swift

I am trying to add a circular progress bar to my app in Swift, however I haven't been able to find any Swift specific examples. Therefore, I found the easiest Objective C example and I am trying to translate it into Swift.

This is the example I'm following: Using circular progress bar with masked image?

I am stuck at this line:

    CGPoint center = CGPointMake(CGRectGetMidX(self.bounds), CGRectGetMidY(self.bounds));

CGRectGetMidX does not seem to be available in Swift.

Here is all of my code so far:

    func drawRect(rect: CGRect) {
    var ctx = UIGraphicsGetCurrentContext()

    var progress: CGFloat = 0.7
    var innerRadiusRatio: CGFloat = 0.5

    var path: CGMutablePathRef = CGPathCreateMutable()
    var startAngle: CGFloat = -M_PI_2
    var endAngle: CGFloat = -M_PI_2 + MIN(1.0, progress) * M_PI * 2
    var outerRadius: CGFloat = CGRectGetWidth(self.bounds) * 0.5 - 1.0
    var innerRadius: CGFloat = outerRadius * innerRadiusRatio
}

Where am I going wrong? As well as struggling to translate this line, the other lines have some errors too.

Upvotes: 0

Views: 5182

Answers (1)

Nate Cook
Nate Cook

Reputation: 93276

I don't get an error on that line at all -- `CGRectGetMidX is still available as far as I can tell:

var center = CGPointMake(CGRectGetMidX(rect), CGRectGetMidY(rect))

The other line that gives me errors is this one -- those constants are of type Double and need to be converted to CGFloat, and in Swift the method is min not MIN:

var endAngle: CGFloat = CGFloat(-M_PI_2) + min(1.0, progress) * CGFloat(M_PI) * 2

Upvotes: 1

Related Questions