1.
2.
3. *)email
4.
5. NSString *emailRegex= @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
6. NSPredicate *emailTest= [NSPredicate predicateWithFormat:@"SELF MATCHES%@",emailRegex];
7. return [emailTest evaluateWithObject:email];
8.
9.
10. *yourImage= [self imageWithImageSimple:image scaledToSize:CGSizeMake(210.0, 210.0)];
11.
12. (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize
13.
14. // Create a graphics image context
15. UIGraphicsBeginImageContext(newSize);
16. // Tell the old image to draw in this newcontext, with the desired
17. // new size
18. [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
19. // Get the new image from the context
20. UIImage* newImage= UIGraphicsGetImageFromCurrentImageContext();
21. // End the context
22. UIGraphicsEndImageContext();
23. // Return the new image.
24. return newImage;
25.
26.
27. (IBAction)uploadButton:(id)sender {
28. UIImage *image= [UIImage imageNamed:@"1.jpg"]; //图片名
29. NSData *imageData= UIImageJPEGRepresentation(image,0.5);//压缩比例
30. NSLog(@"字节数:%i",[imageData length]);
31. // post url
32. NSString *urlString= @"http://192.168.1.113:8090/text/UploadServlet";
33. //服务器地址
34. // setting up the request object now
35. NSMutableURLRequest *request= [[NSMutableURLRequest alloc] init] ;
36. [request setURL:[NSURL URLWithString:urlString]];
37. [request setHTTPMethod:@"POST"];
38. //
39. NSString *boundary= [NSString stringWithString:@"---------------------------14737809831466499882746641449"];
40. NSString *contentType= [NSString stringWithFormat:@"multipart/form-data;boundary=%@",boundary];
41. [request addValue:contentType forHTTPHeaderField: @"Content-Type"];
42. //
43. NSMutableData *body= [NSMutableData data];
44. [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
45. [body appendData:[[NSString stringWithString:@"Content-Disposition:form-data; name="userfile"; filename="2.png"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]]; //上传上去的图片名字
46. [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
47. [body appendData:[NSData dataWithData:imageData]];
48. [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
49. [request setHTTPBody:body];
50. // NSLog(@"1-body:%@",body);
51. NSLog(@"2-request:%@",request);
52. NSData *returnData= [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
53. NSString *returnString= [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
54. NSLog(@"3-测试输出：%@",returnString);
55. 15.给imageView加载图片
56. UIImage *myImage= [UIImage imageNamed:@"1.jpg"];
57. [imageView setImage:myImage];
58. [self.view addSubview:imageView];
59. 16.对图库的操作
60. 选择相册：
61. UIImagePickerControllerSourceTypesourceType=UIImagePickerControllerSourceTypeCamera;
62. if (![UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
63. sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
64. }
65. UIImagePickerController * picker= [[UIImagePickerControlleralloc]init];
66. picker.delegate= self;
67. picker.allowsEditing=YES;
68. picker.sourceType=sourceType;
69. [self presentModalViewController:picker animated:YES];
70. 选择完毕：
71. -(void)imagePickerController:(UIImagePickerController*)pickerdidFinishPickingMediaWithInfo:(NSDictionary *)info
72. {
73. [picker dismissModalViewControllerAnimated:YES];
74. UIImage * image=[info objectForKey:UIImagePickerControllerEditedImage];
75. [self performSelector:@selector(selectPic:) withObject:imageafterDelay:0.1];
76. }
77. -(void)selectPic:(UIImage*)image
78. {
79. NSLog(@"image%@",image);
80. imageView= [[UIImageView alloc] initWithImage:image];
81. imageView.frame= CGRectMake(0, 0, image.size.width, image.size.height);
82. [self.viewaddSubview:imageView];
83. [self performSelectorInBackground:@selector(detect:) withObject:nil];
84. }
85. detect为自己定义的方法，编辑选取照片后要实现的效果
86. 取消选择：
87. -(void)imagePickerControllerDIdCancel:(UIImagePickerController*)picker
88. {
89. [picker dismissModalViewControllerAnimated:YES];
90. }
91. 17.跳到下个View
92. nextWebView= [[WEBViewController alloc] initWithNibName:@"WEBViewController" bundle:nil];
93. [self presentModalViewController:nextWebView animated:YES];
94.
95.
96. //创建一个UIBarButtonItem右边按钮
97. UIBarButtonItem *rightButton= [[UIBarButtonItem alloc] initWithTitle:@"右边" style:UIBarButtonItemStyleDone target:self action:@selector(clickRightButton)];
98. [self.navigationItem setRightBarButtonItem:rightButton];
99. 设置navigationBar隐藏
100. self.navigationController.navigationBarHidden= YES;//
101. iOS开发之UIlabel多行文字自动换行 （自动折行）
102. UIView *footerView= [[UIView alloc]initWithFrame:CGRectMake(10, 100, 300, 180)];
103. UILabel *label= [[UILabel alloc]initWithFrame:CGRectMake(10, 100, 300, 150)];
104. label.text= @"Hello world! Hello world!Hello world! Hello world! Hello world! Hello world! Hello world! Hello world!Hello world! Hello world! Hello world! Hello world! Hello world! Helloworld!";
105. //背景颜色为红色
106. label.backgroundColor= [UIColor redColor];
107. //设置字体颜色为白色
108. label.textColor= [UIColor whiteColor];
109. //文字居中显示
110. label.textAlignment= UITextAlignmentCenter;
111. //自动折行设置
112. label.lineBreakMode= UILineBreakModeWordWrap;
113. label.numberOfLines= 0;
114. 30.代码生成button
115. CGRect frame= CGRectMake(0, 400, 72.0, 37.0);
116. UIButton *button= [UIButton buttonWithType:UIButtonTypeRoundedRect];
117. button.frame= frame;
118. [button setTitle:@"新添加的按钮" forState: UIControlStateNormal];
119. button.backgroundColor= [UIColor clearColor];
120. button.tag= 2000;
121. [button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
122. [self.view addSubview:button];
123. 31.让某个控件在View的中心位置显示：
124. （某个控件，比如label，View）label.center= self.view.center;
125. 32.好看的文字处理
126. 以tableView中cell的textLabel为例子：
127. cell.backgroundColor= [UIColorscrollViewTexturedBackgroundColor];
128. //设置文字的字体
129. cell.textLabel.font= [UIFont fontWithName:@"AmericanTypewriter" size:100.0f];
130. //设置文字的颜色
131. cell.textLabel.textColor= [UIColor orangeColor];
132. //设置文字的背景颜色
133. cell.textLabel.shadowColor= [UIColor whiteColor];
134. //设置文字的显示位置
135. cell.textLabel.textAlignment= UITextAlignmentCenter;
136. 33. ———————-隐藏Status Bar—————————–
137. 读者可能知道一个简易的方法,那就是在程序的viewDidLoad中加入
138. [[UIApplication sharedApplication]setStatusBarHidden:YES animated:NO];
139. 33. 更改AlertView背景
140.
141. UIAlertView *theAlert= [[[UIAlertViewalloc] initWithTitle:@"Atention"
142. message: @"I'm a Chinese!"
143. delegate:nil
144. cancelButtonTitle:@"Cancel"
145. otherButtonTitles:@"Okay",nil] autorelease];
146. [theAlert show];
147. UIImage *theImage= [UIImageimageNamed:@"loveChina.png"];
148. theImage= [theImage stretchableImageWithLeftCapWidth:0topCapHeight:0];
149. CGSize theSize= [theAlert frame].size;
150. UIGraphicsBeginImageContext(theSize);
151. [theImage drawInRect:CGRectMake(5, 5, theSize.width-10, theSize.height-20)];//这个地方的大小要自己调整，以适应alertview的背景颜色的大小。
152. theImage= UIGraphicsGetImageFromCurrentImageContext();
153. UIGraphicsEndImageContext();
154. theAlert.layer.contents= (id)[theImage CGImage];
155. 34. 键盘透明
156. textField.keyboardAppearance= UIKeyboardAppearanceAlert;
157.
158. 状态栏的网络活动风火轮是否旋转
159. [UIApplication sharedApplication].networkActivityIndicatorVisible，默认值是NO。
160.
161. 35截取屏幕图片
162. //创建一个基于位图的图形上下文并指定大小为CGSizeMake(200,400)
163. UIGraphicsBeginImageContext(CGSizeMake(200,400));
164.
165. //renderInContext 呈现接受者及其子范围到指定的上下文
166. [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];
167. //返回一个基于当前图形上下文的图片
168. UIImage *aImage= UIGraphicsGetImageFromCurrentImageContext();
169. //移除栈顶的基于当前位图的图形上下文
170. UIGraphicsEndImageContext();
171. //以png格式返回指定图片的数据
172. imageData= UIImagePNGRepresentation(aImage);
173. 36更改cell选中的背景
174. UIView *myview= [[UIView alloc] init];
175. myview.frame= CGRectMake(0, 0, 320, 47);
176. myview.backgroundColor= [UIColorcolorWithPatternImage:[UIImage imageNamed:@"0006.png"]];
177. cell.selectedBackgroundView= myview;
178. 37显示图像:
179. CGRect myImageRect= CGRectMake(0.0f, 0.0f, 320.0f, 109.0f);
180. UIImageView *myImage= [[UIImageView alloc] initWithFrame:myImageRect];
181. [myImage setImage:[UIImage imageNamed:@"myImage.png"]];
182. myImage.opaque= YES; //opaque是否透明
183. [self.view addSubview:myImage];
184. 38.能让图片适应框的大小（没有确认）
185. NSString*imagePath= [[NSBundle mainBundle] pathForResource:@"XcodeCrash"ofType:@"png"];
186. UIImage *image= [[UIImage alloc]initWithContentsOfFile:imagePath];
187. UIImage *newImage= [image transformWidth:80.f height:240.f];
188. UIImageView *imageView= [[UIImageView alloc]initWithImage:newImage];
189. [newImagerelease];
190. [image release];
191. [self.view addSubview:imageView];
192. 39.实现点击图片进行跳转的代码：生成一个带有背景图片的button，给button绑定想要的事件！
193. UIButton *imgButton=[[UIButton alloc]initWithFrame:CGRectMake(0, 0, 120, 120)];
194. [imgButton setBackgroundImage:(UIImage *)[self.imgArray objectAtIndex:indexPath.row] forState:UIControlStateNormal];
195. imgButton.tag=[indexPath row];
196. [imgButton addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
197. 也可以使用UIView上的Tap点击事件
198. self action:@selector(handleSingleTap:)];
[self.headImage addGestureRecognizer:singleTap]; 0
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iOS 17个常用代码整理
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