view.xib的说明
View的custom cass是关联自身的 File’s owner是关联任意类的
方式一.xib拖xib 用File’s owner
方式二.代码加载，不向某个控制器关联控件 用View的custom class
一.代码加载XIB
1）.只有xib文件
1.只有View1.xib文件
2.File’s Owner 和View1的Custom class都未设置
加载View的方法
UIView *v1 = [[[NSBundle mainBundle]
loadNibNamed:@"View1" owner:nil options:nil] lastObject];
2).有xib****( .h 和.m )
****文件
1.有View11.xib View11.h View11.m文件
2.File’s Owner 和View1的Custom class都未设置
加载View的方法
UIView *v11 = [[[NSBundle mainBundle]
loadNibNamed:@"View11" owner:nil options:nil] lastObject];
3).有xib文件,设置了File’s Owner
1.有View2.xib文件
2.A.File’s Owner 为ViewController (File’s Owner关联ViewController.xib,可以向 VIewController.h或ViewCOntroller.m拖线）
B. 或者设置为UIViewController
3.View2的Custom class未设置
A种情况 某个ViewController的View
ViewControler加载View方法
UIView *v2 = [[[NSBundle mainBundle]
loadNibNamed:@"View2" owner:self options:nil] lastObject];
B种情况 公共的
加载View方法
UIView *v2 = [[UIViewController alloc] initWithNibName:
@"View2" bundle:nil].view;
- .有xib( .h 和.m ) 文件，设置了File’s Owner 和 View的Custom Class**
1.有View3.xib文件 View3.h View3.m
2.File’s Owner设置为 A.ViewContoller
或者 B.UIViewController）
3.View3的Custom class 设置为 VIew3 (xib可以向 View3.h或View3.m拖线)
A种情况 某个ViewController的View
ViewControler加载View方法
UIView *v3 = [[[NSBundle mainBundle] loadNibNamed:
@"View3" owner:self options:nil] lastObject];
B种情况 公共的 需要将view和File’s Owner连线
加载View方法
UIView *v3 = [[UIViewController alloc] initWithNibName:
@"View3" bundle:nil].view;
注：
当新建AViewController类时默认生成
1.AViewController.h 和 AViewController.m文件
2.AViewController.xib
即可 [[AViewController alloc] initWithNibName:@"" bundle:nil]
5).有xib( .h 和.m ) 文件，设置了File’s Owner
1.有View3.xib文件 View3.h View3.m
2.File’s Owner(File’s Owner可以设置为A.ViewContoller 或者 B.UIViewController）
其他controller使用代码:[UINib nibWithNibName:@"CycleScrollView"bundle:nil]
XIB拖XIB
一 .通过父View的Custom Class (XIB拖XIB) 有缺陷,不用
ViewController
加载xib时候会触发一些方法，如：
- (id)initWithCoder:(NSCoder *)aDecoder
- (id)awakeAfterUsingCoder:(NSCoder*)aDecoder
可以在-awakeAfterUsingCoder:(NSCoder*)aDecoder里通过 nibName 获取xib实例并加以替换
1.新建CustomView.h
CustomView.m
CustomView.xib
2.设置
CustomView.xib里父View
的Custom Class为
CustomView 设置其他Xib或StoryBoard里
View的 Custom Class为CustomView
3.在 CustomView
.m 文件里附上代码
- (id) awakeAfterUsingCoder:(NSCoder)aDecoder {
BOOL theThingThatGotLoadedWasJustAPlaceholder = ([[self subviews] count] == 0);
if (theThingThatGotLoadedWasJustAPlaceholder) {
SubView theRealThing = [[self class] loadFromNibNoOwner];
// pass properties through
[self copyUIPropertiesTo:theRealThing];
//auto layout
self.translatesAutoresizingMaskIntoConstraints = NO;
theRealThing.translatesAutoresizingMaskIntoConstraints = NO;
return theRealThing;
}
return self;
}
-(void) copyUIPropertiesTo:(UIView *)view
{
// reflection did not work to get those lists, so I hardcoded them
// any suggestions are welcome here
NSArray *properties =
[NSArray arrayWithObjects: @"frame",@"bounds", @"center", @"transform", @"contentScaleFactor", @"multipleTouchEnabled", @"exclusiveTouch", @"autoresizesSubviews", @"autoresizingMask", @"clipsToBounds", @"backgroundColor", @"alpha", @"opaque", @"clearsContextBeforeDrawing", @"hidden", @"contentMode", @"contentStretch", nil];
// some getters have 'is' prefix
NSArray *getters =
[NSArray arrayWithObjects: @"frame", @"bounds", @"center", @"transform", @"contentScaleFactor", @"isMultipleTouchEnabled", @"isExclusiveTouch", @"autoresizesSubviews", @"autoresizingMask", @"clipsToBounds", @"backgroundColor", @"alpha", @"isOpaque", @"clearsContextBeforeDrawing", @"isHidden", @"contentMode", @"contentStretch", nil];
for (int i=0; i<[properties count]; i++)
{
NSString * propertyName = [properties objectAtIndex:i];
NSString * getter = [getters objectAtIndex:i];
SEL getPropertySelector = NSSelectorFromString(getter);
NSString *setterSelectorName =
[propertyName stringByReplacingCharactersInRange:NSMakeRange(0,1) withString:[[propertyName substringToIndex:1] capitalizedString]];
setterSelectorName = [NSString stringWithFormat:@"set%@:", setterSelectorName];
SEL setPropertySelector = NSSelectorFromString(setterSelectorName);
if ([self respondsToSelector:getPropertySelector] && [view respondsToSelector:setPropertySelector])
{
NSObject * propertyValue = [self valueForKey:propertyName];
[view setValue:propertyValue forKey:propertyName];
}
}
}
**二 .通过file’s owner的Custom Class (XIB拖XIB)
**
通过重载 initWithCoder方法来实现，因为通过 xib 来创建一个对象会调用到这个方法，所以我们需要在这个方法里做一些处理，把这个 CustomView的 xib中的内容加载进来，这时同样是需要通过代码来来加载
1.新建CustomView.h
CustomView.m
CustomView.xib
2.设置
CustomView.xib里file’s owner的Custom Class为 CustomView 设置其他Xib或StoryBoard里View的 Custom Class为CustomView
3.在 CustomView
.m 文件里附上代码
- (id)initWithCoder:(NSCoder *)aDecoder
{
if (self = [super initWithCoder:aDecoder]) {
UIView *containerView = [[[UINib nibWithNibName:@"CustomView" bundle:nil] instantiateWithOwner:self options:nil] objectAtIndex:0];
CGRect newFrame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
containerView.frame = newFrame;
[self addSubview:containerView];
}
return self;
}
