18:图片视图几种填充样式
_imgView.contentMode = UIViewContentModeScaleAspectFill; 如下: typedef NS_ENUM(NSInteger, UIViewContentMode) { UIViewContentModeScaleToFill, UIViewContentModeScaleAspectFit, UIViewContentModeScaleAspectFill, UIViewContentModeRedraw, // redraw on bounds change (calls -setNeedsDisplay) UIViewContentModeCenter, // contents remain same size. positioned adjusted. UIViewContentModeTop, UIViewContentModeBottom, UIViewContentModeLeft, UIViewContentModeRight, UIViewContentModeTopLeft, UIViewContentModeTopRight, UIViewContentModeBottomLeft, UIViewContentModeBottomRight, }; 简单说明: UIViewContentModeScaleToFill:表示完全填充在 frame. 里。(默认) UIViewContentModeScaleAspectFit:保持比例,都在 frame. 内。 UIViewContentModeScaleAspectFill:保持比例,填满但 frame. 外也有。 UIViewContentModeRedraw:? UIViewContentModeCenter:这个 image 的中心与 frame. 的中心重合。 UIViewContentModeTop:这个 image 的上边缘与 frame. 的上边缘重合。 UIViewContentModeBottom:这个 image 的下边缘与 frame. 的下边缘重合。 UIViewContentModeLeft:这个 image 的左边缘与 frame. 的左边缘重合。 UIViewContentModeRight:这个 image 的右边缘与 frame. 的右边缘重合。 UIViewContentModeTopLeft:类似。 UIViewContentModeTopRight:类似。 UIViewContentModeBottomLeft:类似。 UIViewContentModeBottomRight:类似。
19:UIView属性clipsTobounds的应用
view添加view,并剪边(UIView属性clipsTobounds的应用) 如题,有两个view: view1,view2 view1添加view2到其中,如果view2大于view1,或者view2的坐标不在view1的范围内,view2是盖着view1的,意思就是超出的部份也会画出来 UIView有一个属性,clipsTobounds 默认情况下是NO, 如果,我们想要view2把超出的那部份隐藏起来的话,就得改变它的父视图也就view1的clipsTobounds属性值。 view1.clipsTobounds = YES;
20:CALayer常见几个设置
边框,圆角,阴影 设置圆角边框 ?someView.layer.cornerRadius =4.0f; someView.layer.masksToBounds = YES; //设置边框及边框颜色 ?someView.layer.borderWidth = 0.5f; someView.layer.borderColor =[ [UIColor grayColor] CGColor]; ?//添加四个边阴影? _imgvPhoto.layer.shadowColor = [UIColor blackColor].CGColor;? _imgvPhoto.layer.shadowOffset = CGSizeMake(0, 0);? _imgvPhoto.layer.shadowOpacity = 0.5;? _imgvPhoto.layer.shadowRadius = 10.0; _ imgvPhoto.layer.masksToBounds = NO; //添加两个边阴影? _imgvPhoto.layer.shadowColor = [UIColor blackColor].CGColor;? _imgvPhoto.layer.shadowOffset = CGSizeMake(4, 4);? _imgvPhoto.layer.shadowOpacity = 0.5;? _imgvPhoto.layer.shadowRadius = 2.0; 说明:?① someView 表示UIView及其之类;?② 必须引入:#import<QuartzCore/QuartzCore.h>
21:UIActionSheet弹出显示
#define kKeyWindow [UIApplication sharedApplication].keyWindow UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照", @"从相册选择", nil]; [actionSheet showInView:kKeyWindow];
22:block回调传参的运用
有两个viewcontroller分别为a,b;其中a跳转到b,从b得到一个值,然后再跳转到a,并显示出b的值; 代码如下: a.h - (IBAction)otherStoryboard:(id)sender; @property (weak, nonatomic) IBOutlet UILabel *lableInfo; a.m - (IBAction)otherStoryboard:(id)sender { UIStoryboard* mainStoryboard=[UIStoryboard storyboardWithName:@"HotelStoryboard" bundle:nil]; HotelViewController* weathcontroller=[mainStoryboard instantiateViewControllerWithIdentifier:@"hotelStoryboard"]; weathcontroller.block=^(NSString* InputValue) { self.lableInfo.text=InputValue; }; [self presentViewController:weathcontroller animated:YES completion:^{ }]; } b.h typedef void(^ChangInputText)(NSString* InputValue); @property(copy,nonatomic)ChangInputText block; - (IBAction)backButton:(id)sender; @property (weak, nonatomic) IBOutlet UITextField *inputText; b.m - (IBAction)backButton:(id)sender { NSString* backsValue=self.inputText.text; _block(backsValue); [self dismissViewControllerAnimated:YES completion:^{ }]; } 当然也可以使用一个公开的方法,然后把block伟参数直接调用,可以访问下面的网址: http://blog.csdn.net/itpeng523/article/details/24315541
23:单例模式运用
.h @interface Coding_NetAPIManager : NSObject (instancetype)sharedManager; - (void)request_Tweet_DoTweet_WithObj:(Tweet *)tweet andBlock:(void (^)(id data, NSError *error))block; @end .m @implementation Coding_NetAPIManager + (instancetype)sharedManager { static Coding_NetAPIManager *shared_manager = nil; static dispatch_once_t pred; dispatch_once(&pred, ^{ shared_manager = [[self alloc] init]; }); return shared_manager; } (void)request_Tweet_DoTweet_WithObj:(Tweet *)tweet andBlock:(void (^)(id data, NSError *error))block{ …. } @end 然后调用时: [[Coding_NetAPIManager sharedManager] request_Tweet_DoTweet_WithObj:nextTweet andBlock:^(id data, NSError *error) { }];
24:常见的常量
#define kKeyWindow [UIApplication sharedApplication].keyWindow #define kScreen_Bounds [UIScreen mainScreen].bounds #define kScreen_Height [UIScreen mainScreen].bounds.size.height #define kScreen_Width [UIScreen mainScreen].bounds.size.width 常用的方法: - (void)setY:(CGFloat)y{ CGRect frame = self.frame; frame.origin.y = y; self.frame = frame; } - (void)setX:(CGFloat)x{ CGRect frame = self.frame; frame.origin.x = x; self.frame = frame; } - (void)setHeight:(CGFloat)height{ CGRect frame = self.frame; frame.size.height = height; self.frame = frame; } - (void)setWidth:(CGFloat)width{ CGRect frame = self.frame; frame.size.width = width; self.frame = frame; } - (void)setSize:(CGSize)size{ CGRect frame = self.frame; frame.size.width = size.width; frame.size.height = size.height; self.frame = frame; } + (CGRect)frameWithOutNavTab{ CGRect frame = kScreen_Bounds; frame.size.height -= (20+44+49);//减去状态栏、导航栏、Tab栏的高度 return frame; } + (CGRect)frameWithOutNav{ CGRect frame = kScreen_Bounds; frame.size.height -= (20+44);//减去状态栏、导航栏的高度 return frame; }
时间: 2024-11-09 16:04:06