在建立iOS項目時,要對用戶界面進行處理,經常使用的方式分爲可視化編程和代碼搭建視圖兩種。html
1.可視化編程分又爲Storyboard和xib兩種。git
使用xib能夠進行代碼與可視化混編,在建立viewController或cell時,直接勾選also create XIB file便可使用,一個xib負責一個界面視圖的搭建。github
而使用Storyboard則能夠在一個Storyboard文件內進行多個界面的搭建以及跳轉,控制器與界面的關聯則經過Storyboard ID(identifier)。編程
不管是xib仍是Storyboard進行界面搭建,都要使用約束進行各個空間的佈局,能夠更加直觀的看到界面搭建的效果,但想要實現代碼的管理,彷佛比較不容易。數組
2.使用代碼搭建,能夠使用CGRect,CGSize,CGPoint等相關方法,可是效率過低,容易寫死數據,適配性不太好;還能夠使用AutoLayout(自動佈局)處理,在github上有一個針對於AutoLayout的第三方:Masonry,已經將其封裝的很是好,能夠方便快捷的使用代碼對視圖進行佈局。ide
Masonry的視圖佈局,須要在子視圖已經加載在父視圖以後才能使用方法進行佈局處理。佈局代碼書寫在一個block塊中,經過鏈式語法進行方法的調用:佈局
1 #import "ViewController.h" 2 #import <Masonry.h> // 使用了Cocoapods進行第三方的安裝,使用<>引用 3 #import "UIView+EqualSpacingLine.h" // 原Masonry中沒有的,須要引用自定義的等寬排列的類目 4 5 #define SIZE [UIScreen mainScreen].bounds.size 6 7 @interface ViewController () 8 9 @end 10 11 @implementation ViewController 12 13 - (void)viewDidLoad { 14 [super viewDidLoad]; 15 16 UIView *view = [UIView new]; 17 view.backgroundColor = [UIColor purpleColor]; 18 [self.view addSubview:view]; 19 20 [view mas_makeConstraints:^(MASConstraintMaker *make) { 21 make.size.mas_equalTo(CGSizeMake(SIZE.width * 0.8, SIZE.height * 0.8)); 22 make.center.equalTo(self.view); 23 }]; 24 25 // 等寬排列設置 26 27 UIView *view2 = [UIView new]; 28 view2.backgroundColor = [UIColor whiteColor]; 29 [view addSubview:view2]; 30 31 [view2 mas_makeConstraints:^(MASConstraintMaker *make) { 32 // 設定與對照視圖寬高比例 33 make.width.equalTo(view).multipliedBy(0.1); 34 make.height.equalTo(view).multipliedBy(0.1); 35 }]; 36 37 UIView *view3 = [UIView new]; 38 view3.backgroundColor = [UIColor greenColor]; 39 [view addSubview:view3]; 40 41 [view3 mas_makeConstraints:^(MASConstraintMaker *make) { 42 make.size.equalTo(view2); 43 44 }]; 45 46 UIView *view4 = [UIView new]; 47 view4.backgroundColor = [UIColor redColor]; 48 [view addSubview:view4]; 49 50 [view4 mas_makeConstraints:^(MASConstraintMaker *make) { 51 make.size.equalTo(view2); 52 53 }]; 54 55 UIView *view5 = [UIView new]; 56 view5.backgroundColor = [UIColor cyanColor]; 57 [view addSubview:view5]; 58 59 [view5 mas_makeConstraints:^(MASConstraintMaker *make) { 60 make.width.equalTo(view2); 61 make.height.equalTo(view2).multipliedBy(1.5); 62 63 }]; 64 65 UIView *view6 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 50, 500)]; 66 view6.backgroundColor = [UIColor blueColor]; 67 [view addSubview:view6]; 68 69 [view6 mas_makeConstraints:^(MASConstraintMaker *make) { 70 // 給定寬高數值 71 make.height.offset(100); 72 make.width.offset(100); 73 }]; 74 75 // 等寬排列 76 [view equalSpacingLineWithViews:@[view2, view3, view4, view5, view6] byDirection:Direction_Horizontal andBlock:^(MASConstraintMaker *make) { 77 make.bottom.equalTo(view); 78 }]; 79 80 } 81 82 @end
效果圖:spa
等寬排列類目:code
UIView+EqualSpacingLine.h
1 #import <UIKit/UIKit.h> 2 #import <Masonry.h> //!!! 使用前務必引用Masonry 3 4 // 排列方向 5 typedef NS_ENUM(NSInteger, Direction) { 6 Direction_Horizontal, 7 Direction_Vertical, 8 }; 9 10 @interface UIView (EqualSpacingLine) 11 12 /** 13 * 等寬排列 14 * @param views 子視圖數組,僅設置寬高便可(使用Masonry設置) 15 * @param direction 排列方向 16 * @param block 添加masonry代碼塊,若是爲nil,則姿式圖居中 17 * @return void 18 */ 19 - (void)equalSpacingLineWithViews:(NSArray<UIView*>*)views byDirection:(Direction)direction andBlock:(void(^)(MASConstraintMaker *make))block; 20 21 @end
UIView+EqualSpacingLine.m
1 #import "UIView+EqualSpacingLine.h" 2 3 @implementation UIView (EqualSpacingLine) 4 5 - (void)equalSpacingLineWithViews:(NSArray<UIView*>*)views byDirection:(Direction)direction andBlock:(void(^)(MASConstraintMaker *make))block{ 6 7 // 添加間隔視圖 8 NSMutableArray *newViews = [NSMutableArray array]; 9 for(int i = 0; i <= views.count; i++){ 10 UIView *view = [UIView new]; 11 [self addSubview:view]; 12 [newViews addObject:view]; 13 if(i != views.count){ 14 [newViews addObject:views[i]]; 15 } 16 } 17 18 // 視圖排列 19 for(int i = 0; i < newViews.count; i++){ 20 [newViews[i] mas_makeConstraints:^(MASConstraintMaker *make) { 21 if(direction == Direction_Horizontal){ 22 // 橫向 左右設置 23 make.left.equalTo(i == 0 ? self : ((UIView*)newViews[i-1]).mas_right); 24 make.right.equalTo(i == newViews.count-1 ? self : ((UIView*)newViews[i+1]).mas_left); 25 // 等寬 26 if(i % 2 == 0) 27 make.width.equalTo((UIView*)newViews[0]); 28 if(!block) 29 make.centerY.equalTo(self); 30 }else{ 31 // 縱向 上下設置 32 make.top.equalTo(i == 0 ? self : ((UIView*)newViews[i-1]).mas_bottom); 33 make.bottom.equalTo(i == newViews.count-1 ? self : ((UIView*)newViews[i+1]).mas_top); 34 // 等高 35 if(i % 2 == 0) 36 make.height.equalTo((UIView*)newViews[0]); 37 if(!block) 38 make.centerX.equalTo(self); 39 } 40 // 添加masonry代碼塊,若爲nil,則居中 41 if(block) 42 block(make); 43 }]; 44 } 45 } 46 47 @end