今天就跟大家聊聊有关怎么在iOS中实现步骤进度条功能，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
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HQLStepView.h 文件
#import@interface HQLStepView : UIView // 指定初始化方法 - (instancetype)initWithFrame:(CGRect)frame titlesArray:(NSArray *)titlesArray stepIndex:(NSUInteger)stepIndex; // 设置当前步骤 - (void)setStepIndex:(NSUInteger)stepIndex animation:(BOOL)animation; @end
HQLStepView.m 文件
#import "HQLStepView.h"
// 步骤条主题色
#define TINT_COLOR [UIColor colorWithRed:35/255.f green:135/255.f blue:255/255.f alpha:1]
@interface HQLStepView ()
@property (nonatomic, copy) NSArray *titlesArray;
@property (nonatomic, assign) NSUInteger stepIndex;
@property (nonatomic, strong) UIProgressView *progressView;
@property (nonatomic, strong) NSMutableArray *circleViewArray;
@property (nonatomic, strong) NSMutableArray *titleLabelArray;
@property (nonatomic, strong) UILabel *indicatorLabel;
@end
@implementation HQLStepView
#pragma mark - Init
- (instancetype)initWithFrame:(CGRect)frame titlesArray:(NSArray *)titlesArray stepIndex:(NSUInteger)stepIndex {
self = [super initWithFrame:frame];
if (self) {
_titlesArray = [titlesArray copy];
_stepIndex = stepIndex;
// 进度条
[self addSubview:self.progressView];
for (NSString *title in _titlesArray) {
// 圆圈
UIView *circle = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 13, 13)];
circle.backgroundColor = [UIColor lightGrayColor];
circle.layer.cornerRadius = 13.0f / 2;
[self addSubview:circle];
[self.circleViewArray addObject:circle];
// 标题
UILabel *label = [[UILabel alloc] init];
label.text = title;
label.font = [UIFont systemFontOfSize:14];
label.textAlignment = NSTextAlignmentCenter;
[self addSubview:label];
[self.titleLabelArray addObject:label];
}
// 当前索引数字
[self addSubview:self.indicatorLabel];
}
return self;
}
// 布局更新页面元素
- (void)layoutSubviews {
NSInteger perWidth = self.frame.size.width / self.titlesArray.count;
// 进度条
self.progressView.frame = CGRectMake(0, 0, self.frame.size.width - perWidth, 1);
self.progressView.center = CGPointMake(self.frame.size.width / 2, self.frame.size.height / 4);
CGFloat startX = self.progressView.frame.origin.x;
for (int i = 0; i < self.titlesArray.count; i++) {
// 圆圈
UIView *cycle = self.circleViewArray[i];
if (cycle) {
cycle.center = CGPointMake(i * perWidth + startX, self.progressView.center.y);
}
// 标题
UILabel *label = self.titleLabelArray[i];
if (label) {
label.frame = CGRectMake(perWidth * i, self.frame.size.height / 2, self.frame.size.width / self.titlesArray.count, self.frame.size.height / 2 );
}
}
self.stepIndex = self.stepIndex;
}
#pragma mark - Custom Accessors
- (UIProgressView *)progressView {
if (!_progressView) {
_progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleDefault];
_progressView.progressTintColor = TINT_COLOR;
_progressView.progress = self.stepIndex / ((self.titlesArray.count - 1) * 1.0);
}
return _progressView;
}
- (UILabel *)indicatorLabel {
if (!_indicatorLabel) {
_indicatorLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 23, 23)];
_indicatorLabel.textColor = TINT_COLOR;
_indicatorLabel.textAlignment = NSTextAlignmentCenter;
_indicatorLabel.backgroundColor = [UIColor whiteColor];
_indicatorLabel.layer.cornerRadius = 23.0f / 2;
_indicatorLabel.layer.borderColor = [TINT_COLOR CGColor];
_indicatorLabel.layer.borderWidth = 1;
_indicatorLabel.layer.masksToBounds = YES;
}
return _indicatorLabel;
}
- (NSMutableArray *)circleViewArray {
if (!_circleViewArray) {
_circleViewArray = [[NSMutableArray alloc] initWithCapacity:self.titlesArray.count];
}
return _circleViewArray;
}
- (NSMutableArray *)titleLabelArray {
if (!_titleLabelArray) {
_titleLabelArray = [[NSMutableArray alloc] initWithCapacity:self.titlesArray.count];
}
return _titleLabelArray;
}
// 设置当前进度索引，更新圆形图片、文本颜色、当前索引数字
- (void)setStepIndex:(NSUInteger)stepIndex {
for (int i = 0; i < self.titlesArray.count; i++) {
UIView *cycle = self.circleViewArray[i];
UILabel *label = self.titleLabelArray[i];
if (stepIndex >= i) {
cycle.backgroundColor = TINT_COLOR;
label.textColor = TINT_COLOR;
} else {
cycle.backgroundColor = [UIColor lightGrayColor];
label.textColor = [UIColor lightGrayColor];
}
}
}
#pragma mark - Public
- (void)setStepIndex:(NSUInteger)stepIndex animation:(BOOL)animation {
if (stepIndex < self.titlesArray.count) {
// 更新颜色
self.stepIndex = stepIndex;
// 设置进度条
[self.progressView setProgress:stepIndex / ((self.titlesArray.count - 1) * 1.0) animated:animation];
// 设置当前索引数字
self.indicatorLabel.text = [NSString stringWithFormat:@"%lu", stepIndex + 1];
self.indicatorLabel.center = ((UIView *)[self.circleViewArray objectAtIndex:stepIndex]).center;
}
}
@end接口调用：
- (void)viewDidLoad {
[super viewDidLoad];
// 初始化
_hqlStepView = [[HQLStepView alloc] initWithFrame:CGRectMake(0, 200, self.view.frame.size.width, 60) titlesArray:@[@"第一步", @"第二步", @"第三步"] stepIndex:0];
[self.view addSubview:_hqlStepView];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
// 设置当前步骤，步骤索引=数组索引
[_hqlStepView setStepIndex:0 animation:YES];
}看完上述内容，你们对怎么在iOS中实现步骤进度条功能有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注创新互联行业资讯频道，感谢大家的支持。
