IOS用戶端Coding項目記錄(三)，ios用戶端coding項目

IOS用戶端Coding項目記錄(三)，ios用戶端coding項目

18：圖片視圖幾種填充樣式

_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,};簡單說明:UIViewContentModeScaleToFill：表示完全填充在 frame. 裡。(預設)UIViewContentModeScaleAspectFit：保持比例，都在 frame. 內。UIViewContentModeScaleAspectFill：保持比例，填滿但 frame. 外也有。UIViewContentModeRedraw：
   UIViewContentModeCenter：這個 image 的中心與 frame. 的中心重合。UIViewContentModeTop：這個 image 的上邊緣與 frame. 的上邊緣重合。UIViewContentModeBottom：這個 image 的下邊緣與 frame. 的下邊緣重合。UIViewContentModeLeft：這個 image 的左邊緣與 frame. 的左邊緣重合。UIViewContentModeRight：這個 image 的右邊緣與 frame. 的右邊緣重合。UIViewContentModeTopLeft：類似。UIViewContentModeTopRight：類似。UIViewContentModeBottomLeft：類似。UIViewContentModeBottomRight：類似。

19:UIView屬性clipsTobounds的應用

view添加view，並剪邊(UIView屬性clipsTobounds的應用)如題，有兩個view： view1,view2view1添加view2到其中，如果view2大於view1，或者view2的座標不在view1的範圍內，view2是蓋著view1的，意思就是超出的部份也會畫出來UIView有一個屬性，clipsTobounds 預設情況下是NO,如果，我們想要view2把超出的那部份隱藏起來的話，就得改變它的父視圖也就view1的clipsTobounds屬性值。view1.clipsTobounds = YES;

20:CALayer常見幾個設定

邊框，圓角，陰影設定圓角邊框
someView.layer.cornerRadius =4.0f;someView.layer.masksToBounds = YES;//設定邊框及邊框顏色
someView.layer.borderWidth = 0.5f;someView.layer.borderColor =[ [UIColor grayColor] CGColor];
//添加四個邊陰影
 _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;  //添加兩個邊陰影
    _imgvPhoto.layer.shadowColor = [UIColor blackColor].CGColor;
    _imgvPhoto.layer.shadowOffset = CGSizeMake(4, 4);
    _imgvPhoto.layer.shadowOpacity = 0.5;
    _imgvPhoto.layer.shadowRadius = 2.0;說明：
①     someView  表示UIView及其之類；
②     必須引入：#import<QuartzCore/QuartzCore.h>

21:UIActionSheet彈出顯示

#define kKeyWindow [UIApplication sharedApplication].keyWindowUIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照", @"從相簿選擇", nil];[actionSheet showInView:kKeyWindow];

22:block回調傳參的運用

有兩個viewcontroller分別為a,b;其中a跳轉到b,從b得到一個值，然後再跳轉到a,並顯示出b的值；代碼如下：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.htypedef 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:^{            }];}當然也可以使用一個公開的方法，然後把block偉參數直接調用，可以訪問下面的網址：http://blog.csdn.net/itpeng523/article/details/24315541

23:單例模式運用

.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然後調用時:        [[Coding_NetAPIManager sharedManager] request_Tweet_DoTweet_WithObj:nextTweet andBlock:^(id data, NSError *error) {        }];

24:常見的常量

#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);//減去狀態列、導覽列、Tab欄的高度    return frame;}+ (CGRect)frameWithOutNav{    CGRect frame = kScreen_Bounds;    frame.size.height -= (20+44);//減去狀態列、導覽列的高度    return frame;}