概要
目前為止,iPhone螢幕尺寸已經有四種:
3.5(inch):1/3G/3GS/4/4S
4.0(inch):5/5S/5C
4.7(inch):6
5.5(inch):6Plus
看一下iPhone4~6(+)的螢幕高寬比:
iPhone4(s):解析度960*640,高寬比1.5
iPhone5(s):解析度1136*640,高寬比1.775
iPhone6:解析度1334*750,高寬比1.779
iPhone6+:解析度1920*1080,高寬比1.778
可粗略認為iPhone5(s)、6(+)的高寬比是一致的(16:9),即可以等比例縮放。因此可以按寬度適配:
fitScreenWidth= width*(SCREEN_WIDTH/320)
這樣,共有iPhone3/4/5、6、6+三組寬度,在iPhone6、6+下將按比例橫向放大,也就是說我們要適配寬、高、字型大小大小(如果說Android螢幕適配是地獄一般,那目前來看iPhone螢幕適配還是很美好的)
適配思路
現在產品設計稿有以iPhone5為基準的,也有以iPhone6為基準的,其實沒太大影響,因為iPhone5、6、6P的螢幕尺寸比例幾乎一樣的,所以以iPhone5為基準標註的尺寸,那適配的方法如下:
#define kScreenWidthRatio (kScreenWidth / 320.0)#define kScreenHeightRatio (kScreenHeight / 568.0)#define AdaptedWidthValue(x) (ceilf((x) * kScreenWidthRatio))#define AdaptedHeightValue(x) (ceilf((x) * kScreenHeightRatio))
其實就是計算一個比例,然後iPhone6、6P等比放大,這樣就保持了iPhone5、6、6P螢幕視覺效果上的一致了。
控制項尺寸思路搞定了,但僅僅控制項等比例展開,其中的內容也要去適應,例如UILabel的字型大小適應,其實也很簡單:
#define kUHSystemFontWithSize(R) [UIFont fontWithName: kULSystemFont size: (AdaptedWidthValue(R))]
實踐
有了思路之後,實踐一下看看效果,首先看一下最終目標效果圖:
Demo簡介:
1、利用TableView展示資料,其中TableView的headerView是滾動的廣告,整體UI布局使用相對布局(Autolayout);
2、Autolayout用的是代碼實現方式,藉助與第三方庫Masonry;
3、headerView的滾動廣告實現是藉助於第三方庫SDCycleScrollView;
4、圖片下載藉助與第三方庫SDWebImage;
5、UITableViewCell的自適應高度藉助與第三方庫UITableView+FDTemplateLayoutCell實現。
建立項目
使用Xcode建立項目後,由於使用到很多第三方,所以使用CocoPods,其中修改Podfile:
platform :ios, '7.0'pod 'Masonry'pod 'SDCycleScrollView'pod 'UITableView+FDTemplateLayoutCell'pod 'SDWebImage'
實現TableView
1、建立TableView,命名為newslistView:
@property (nonatomic, strong) UITableView *newslistView;
具體實現不說了,介紹一下TableView的布局,這裡TableView沾滿ViewController的View:
[self.newslistView mas_makeConstraints:^(MASConstraintMaker *make) { make.edges.equalTo(self.view); }];
2、實現TableViewHeader
- (void) loadTableViewHeaderView { SDCycleScrollView * cycleScrollView = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 0, kScreenWidth, AdaptedHeightValue(SDCycleScrollViewHeight)) imageURLStringsGroup:nil]; // 類比網路延時情景 cycleScrollView.pageControlAliment = SDCycleScrollViewPageContolAlimentRight; cycleScrollView.delegate = self; cycleScrollView.showPageControl = YES; cycleScrollView.pageControlStyle = SDCycleScrollViewPageContolStyleAnimated; cycleScrollView.pageControlAliment = SDCycleScrollViewPageContolAlimentCenter; cycleScrollView.dotColor = [UIColor whiteColor]; // 自訂分頁控制項小圓標顏色 cycleScrollView.placeholderImage = [UIImage imageNamed:@"detail_top"]; [self.view addSubview:cycleScrollView]; cycleScrollView.imageURLStringsGroup = [self.dataDictionary valueForKey:@"advertisement"]; self.newslistView.tableHeaderView = cycleScrollView;}
這裡使用到了 AdaptedHeightValue ( SDCycleScrollViewHeight )來適應螢幕尺寸,4/4S裝置的TableViewHeader高度就小一些,6和6P的TableViewHeader高度就大一些,因為我們是已5代裝置為參考實現的產品設計稿。
3、實現TableViewCell
#define UI_DEBUG 0#define ULAppearanceFontSizeMiddle 13#define ULAppearanceFontSizeSmall 12NSString *const NewsListCellIdentifier = @"NewsListCellIdentifier";static const CGFloat ULNewsListCellNewsimageViewMarginLeft = 10.0;static const CGFloat ULNewsListCellNewsimageViewWidth = 100.0;static const CGFloat ULNewsListCellNewsimageViewHeight = 80.0;static const CGFloat ULNewsListCellTitleLabelMarginTop = 10.0;static const CGFloat ULNewsListCellTitleLabelMarginLeft = 10.0;static const CGFloat ULNewsListCellTitleLabelMarginRight = 10.0;static const CGFloat ULNewsListCellTitleLabelHeight = 20.0;static const CGFloat ULNewsListCellContentLabelMarginTop = 10.0;static const CGFloat ULNewsListCellContentLabelMarginBottom = 10.0;static const CGFloat ULNewsListCellLineViewMarginLeft = 10.0;static const CGFloat ULNewsListCellLineViewMarginRight = 10.0;static const CGFloat ULNewsListCellLineViewHeight = 0.5;@interface NewsListCell ()@property (nonatomic, strong) UIImageView *newsImageView;@property (nonatomic, strong) UILabel *titleLabel;@property (nonatomic, strong) UILabel *contentLabel;@property (nonatomic, strong) UIView *lineView;@end@implementation NewsListCell- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier { if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {#if UI_DEBUG self.contentView.backgroundColor = [UIColor redColor];#endif [self.contentView addSubview:self.newsImageView]; [self.contentView addSubview:self.titleLabel]; [self.contentView addSubview:self.contentLabel]; [self.contentView addSubview:self.lineView]; [self makeConstraintSubviews]; } return self;}- (void) makeConstraintSubviews { [self.newsImageView mas_makeConstraints:^(MASConstraintMaker *make) { make.left.equalTo(self.contentView.mas_left).offset(AdaptedWidthValue(ULNewsListCellNewsimageViewMarginLeft)); make.size.mas_equalTo(CGSizeMake(AdaptedWidthValue(ULNewsListCellNewsimageViewWidth), AdaptedHeightValue(ULNewsListCellNewsimageViewHeight))); make.centerY.equalTo(self.contentView.mas_centerY); }]; [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) { make.top.equalTo(self.contentView.mas_top).offset(AdaptedHeightValue(ULNewsListCellTitleLabelMarginTop)); make.left.equalTo(self.newsImageView.mas_right).offset(AdaptedWidthValue(ULNewsListCellTitleLabelMarginLeft)); make.right.equalTo(self.contentView.mas_right).offset(-AdaptedWidthValue(ULNewsListCellTitleLabelMarginRight)); make.height.mas_equalTo(AdaptedHeightValue(ULNewsListCellTitleLabelHeight));// make.bottom.equalTo(self.contentLabel.mas_top).offset(-AdaptedHeightValue(ULNewsListCellContentLabelMarginTop)); }]; [self.contentLabel mas_makeConstraints:^(MASConstraintMaker *make) { make.left.right.equalTo(self.titleLabel); make.top.equalTo(self.titleLabel.mas_bottom).offset(AdaptedHeightValue(ULNewsListCellContentLabelMarginTop)); make.bottom.equalTo(self.lineView.mas_bottom).offset(-AdaptedHeightValue(ULNewsListCellContentLabelMarginBottom)); }]; [self.lineView mas_makeConstraints:^(MASConstraintMaker *make) { make.bottom.equalTo(self.contentView.mas_bottom).offset(-ULNewsListCellLineViewHeight); make.left.equalTo(self.contentView.mas_left).offset(AdaptedWidthValue(ULNewsListCellLineViewMarginLeft)); make.right.equalTo(self.contentView.mas_right).offset(-AdaptedWidthValue(ULNewsListCellLineViewMarginRight));; make.height.mas_equalTo(ULNewsListCellLineViewHeight); }];}- (void)configureWithData:(News *) news { [self.newsImageView sd_setImageWithURL:[NSURL URLWithString:news.imageUrl]]; self.titleLabel.text = news.title; self.contentLabel.text = news.content;}#pragma mark - Getters- (UIImageView *) newsImageView { if (!_newsImageView) { _newsImageView = [[UIImageView alloc] init];#if UI_DEBUG _newsImageView.backgroundColor = [UIColor greenColor];#endif } return _newsImageView;}- (UILabel *) titleLabel { if (!_titleLabel) { _titleLabel = [[UILabel alloc] init]; _titleLabel.font = kUHSystemFontWithSize(ULAppearanceFontSizeMiddle); _titleLabel.textColor = [UIColor blackColor]; #if UI_DEBUG _titleLabel.backgroundColor = [UIColor lightGrayColor];#endif } return _titleLabel;}- (UILabel *) contentLabel { if (!_contentLabel) { _contentLabel = [[UILabel alloc] init]; _contentLabel.font = kUHSystemFontWithSize(ULAppearanceFontSizeSmall); _contentLabel.textColor = [UIColor grayColor]; _contentLabel.numberOfLines = 0; _contentLabel.lineBreakMode = NSLineBreakByWordWrapping; _contentLabel.textAlignment = NSTextAlignmentLeft; #if UI_DEBUG _contentLabel.backgroundColor = [UIColor brownColor];#endif } return _contentLabel;}- (UIView *) lineView { if (!_lineView) { _lineView = [[UIView alloc] init]; _lineView.backgroundColor = [UIColor lightGrayColor]; } return _lineView;}@end
這樣利用尺寸展開,並配合Autolayout,就輕鬆實現了iPhone裝置適配。其中Cell高度自動適應請參考 UITableView+FDTemplateLayoutCell第三方庫使用方法。
如果不使用Autolayout,而使用Frame方式,這裡就不介紹了,還是儘快轉向Autolayout吧,還有一些相關內容也很好,想瞭解可以參考:
http://blog.csdn.net/phunxm/article/details/42174937
http://www.cocoachina.com/ios/20141230/10800.html
歡迎一起討論
Demo下載