1 1、退回输入键盘
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3 - (BOOL) textFieldShouldReturn:(id)textField{
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5 [textField resignFirstResponder];
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7 }
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9 2、CGRect
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11 CGRect frame = CGRectMake (origin.x, origin.y, size.width, size.height)；矩形
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13 NSStringFromCGRect(someCG) 把CGRect结构转变为格式化字符串；
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15 CGRectFromString(aString) 由字符串恢复出矩形；
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17 CGRectInset(aRect) 创建较小或较大的矩形（中心点相同），＋较小 －较大
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19 CGRectIntersectsRect(rect1, rect2) 判断两矩形是否交叉，是否重叠
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21 CGRectZero 高度和宽度为零的／位于（0，0）的矩形常量
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23
24 3、CGPoint & CGSize
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26 CGPoint aPoint = CGPointMake(x, y);
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28 CGSize aSize = CGSizeMake(width, height);
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30 4、设置透明度
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32 [myView setAlpha:value]; (0.0 < value < 1.0)
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34 5、设置背景色
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36 [myView setBackgroundColor:[UIColor redColor]];
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38 (blackColor;darkGrayColor;lightGrayColor;
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40 whiteColor;grayColor; redColor; greenColor;
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42 blueColor; cyanColor;yellowColor;
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44 magentaColor;orangeColor;purpleColor;
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46 brownColor; clearColor; )
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48 6、自定义颜色
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50 UIColor *newColor = [[UIColor alloc]
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52 initWithRed:(float) green:(float) blue:(float) alpha:(float)];
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54 0.0~1.0
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56 7、隐藏状态栏
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58 [[UIApplication shareApplication] setStatusBarHidden: YES animated:NO]
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60 8、横屏
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62 [[UIApplication shareApplication]
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64 setStatusBarOrientation:UIInterfaceOrientationLandscapeRight].
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66 9、屏幕变动检测
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68 orientation == UIInterfaceOrientationLandscapeLeft
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70 10、全屏
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72 window=[[UIWindow alloc] initWithFrame:[UIScreen mainScreen] bounds];
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74 11、自动适应父视图大小：
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76 aView.autoresizingSubviews = YES;
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78 aView.autoresizingMask = (UIViewAutoresizingFlexibleWidth |UIViewAutoresizingFlexibleHeight);
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80 12、 定义按钮
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82 UIButton *scaleUpButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
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84 [scaleUpButton setTitle:@"放 大" forState:UIControlStateNormal];
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86 scaleUpButton.frame = CGRectMake(40, 420, 100, 40);
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88 [scaleUpButton addTarget:self action:@selector(scaleUp)
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90 forControlEvents:UIControlEventTouchUpInside];
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92 13、设置视图背景图片
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94 UIImageView *aView;
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96 [aView setImage:[UIImage imageNamed:@”name.png”]];
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98 view1.backgroundColor = [UIColor colorWithPatternImage:
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100 [UIImage imageNamed:@"image1.png"]];
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102 14、从Plist里读内容
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104 NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"book" ofType:@"plist"];
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106 NSDictionary *dictionary = [[NSDictionary alloc] initWithContentsOfFile:plistPath];
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108 NSString *book = [dictionary objectForKey:bookTitle];
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110 [textView setText:book];
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112
113
114 (void) initialize {
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116 NSUserDefaults = [NSUserDefaults standardUserDefaults];
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118 NSDictionary *appDefaults = [NSDictionary dictionaryWithObject:@"YES" forKey:@"DeleteBackup"];
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120 [defaults registerDefaults:appDefaults];
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122 }
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124
125
126 To get a value of a default, use the valueForKey: method:
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128 [[theDefaultsController values] valueForKey:@"userName"];
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130 To set a value for a default, use setValue:forKey:
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132 [[theDefaultsController values] setValue:newUserName forKey:@"userName"];
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134
135
136 [[NSUserDefaults standardUserDefaults] setValue:aVale forKey:aKey];
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138 [[NSUserDefaults standardUserDefaults] valueForKey:aKey];
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140 15、获取Documents目录
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142 NSArray *paths = NSSearchPathForDictionariesInDomains(NSDocumentDirectory,
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144 NSUserDomainMask, YES);
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146 NSString *documentsDirectory = [paths objectAtIndex:0];
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148 NSString *filename = [documentsDirectory
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150 stringByAppendingPathComponent:@"theFile.txt"];
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152
153
154 获取tmp目录
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156 NSString *tempPath = NSTemporaryDirectory();
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158 NSString *tempFile = [tempPath stringByAppendingPathComponent:@"tempFile.txt"];
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160
161
162 [[NSUserDefaults standardUserDefaults] setObject:data forKey:@"someKey"];
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164 [[NSUserDefaults standardUserDefaults] objectForKey:aKey];
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166 16、
167 -(BOOL) isKindOfClass:class // 对象是不是class或其子类成员
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169 -(BOOL) isMemberOfClass:class // 对象是不是class的成员
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171 -(BOOL) respondsToSelector:selector // 对象是否能够相应selector所指定的方法
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173 +(BOOL) instancesRespondToSelector:selector // 指定对象实力是否能响应selector
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175 +(BOOL) isSubclassOfClass:class // 对象是否指定类的子类
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177 -(id) performSwlector:selector // 应用selector指定的方法
178
179 -(id) perforumSelector:selector widthObject:object // 应用selector指定方法传参object
