UIView 的使用

最新推荐文章于 2019-08-01 18:14:44 发布

原创最新推荐文章于 2019-08-01 18:14:44 发布 · 257 阅读

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CC 4.0 BY-SA版权

本文介绍了在iOS开发中如何使用Objective-C创建和管理UIView，包括通过strong和weak属性创建视图、添加子视图的方法及自定义UIView的过程。

#pragma mark - /************************ getters setters view **************************/

/**

* setter getter view

//============================" UIView "=============================

//strong 创建view
@property (nonatomic, strong) UIView *BgView;

- (UIView *)BgView {
    if (_BgView==nil) {
        _BgView = [[UIView alloc] initWithFrame:CGRectMake(30, 20, SSWIDTH-60, 300)];
        _BgView.backgroundColor = Yellow_COLOR;
    }return _BgView;
}
//可以先添加，后调用
[self.view addSubview:self.BgView];

//weak 创建view
@property (nonatomic, weak) UIView *BgView;
- (UIView *)BgView {
    if (_BgView==nil) {
        UIView *BgView = [[UIView alloc] initWithFrame:CGRectMake(0, 64, SSWIDTH, 50)];
        [self.view addSubview:BgView];
        _BgView = BgView;
    }return _BgView;
}
//用self直接调用

//添加多个 view
- (void)addViewToSuperView:(UIView *)superView frame:(CGRect)frame tag:(NSInteger)tag
{
    UIView *myView = [[UIView alloc] initWithFrame:frame];
    myView.tag= tag;
    [superView addSubview:myView];
    if (tag==111){
        _view1 = myView;
        
    }else if (tag==222){
        _view2 = myView;
        
    }else if (tag==333){
        _view3 = myView;
    }
}

// 自定义view


- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        self.backgroundColor = [UIColor clearColor];
 		//iOS设置父视图透明度而不影响子视图
        self.backgroundColor = [[UIColor lightGrayColor] colorWithAlphaComponent:0.1];
		//TableView的背景
 	   self.view.backgroundColor = [UIColor groupTableViewBackgroundColor]; 
	[self configUI];     
    }
    return self;
}
- (instancetype)init {
    self = [super init];
    if (self) {
	[self configUI];
    }
    return self;
}
- (void)configUI {
 
}