BSModalPickerView/BSModalPickerView/BSModalFloatRangePickerView.m at 69065280848eccaa6d607a1ac432013d3adf8220 · subdigital/BSModalPickerView · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
//
//  BSModalFloatRangePickerView.m
//  GolfNow
//
//  Created by Cameron Hall on 3/26/15.
//  Copyright (c) 2015 Vertigo. All rights reserved.
//

#import "BSModalFloatRangePickerView.h"

@interface BSModalFloatRangePickerView()

@property (nonatomic) CGFloat floatInterval;

@property (nonatomic) CGFloat minRangeValue;
@property (nonatomic) CGFloat maxRangeValue;

@end

@implementation BSModalFloatRangePickerView

- (instancetype)initWithFloatInterval:(CGFloat)floatInterval andMinRange:(CGFloat)minRangeValue andMaxRange:(CGFloat)maxRangeValue {
    if (self = [super init]) {
        self.minRangeValue = minRangeValue;
        self.maxRangeValue = maxRangeValue;
        self.floatInterval = floatInterval;

        if (self.minRangeValue > self.maxRangeValue) {
            self.maxRangeValue = self.minRangeValue;
        }

        [self calculateRangeValues];
    }

    return self;
}

#pragma mark - BSModalRangePickerBase

- (void)calculateRangeValues {
    CGFloat rangeDiff = self.maxRangeValue - self.minRangeValue;
    NSInteger numberOfValues = rangeDiff / self.floatInterval + 1;
    NSMutableArray *rangeValues = [NSMutableArray array];

    for (NSInteger i = 0; i < numberOfValues; ++i) {
        NSNumber *value = [NSNumber numberWithFloat:i * self.floatInterval];
        [rangeValues addObject:value];
    }

    self.rangeValues = rangeValues;
}

- (NSString *)formatValue:(id)value forComponent:(NSInteger)component {
    NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
    numberFormatter.numberStyle = NSNumberFormatterDecimalStyle;

    NSString *formattedValue = [numberFormatter stringFromNumber:value];
    return formattedValue;
}

- (NSUInteger)indexForSelectedValue:(id)value {
    __block NSUInteger result = 0;

    if (value) {
        CGFloat floatValue = [value floatValue];

        [self.rangeValues enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            NSNumber *rangeValue = (NSNumber *)obj;
            CGFloat rangeFloatValue = [rangeValue floatValue];

            if ([BSModalFloatRangePickerView floatValue:floatValue isEqualToFloat:rangeFloatValue]) {
                result = idx;
                *stop = YES;
            }
        }];
    }

    return result;
}

+ (BOOL)floatValue:(CGFloat)firstValue isEqualToFloat:(CGFloat)secondValue {
    double diff = fabs(firstValue - secondValue);
    firstValue = fabs(firstValue);
    secondValue = fabs(secondValue);
    double largest = (secondValue > firstValue) ? secondValue : firstValue;
    return (diff <= largest * FLT_EPSILON);
}

@end