类似点赞时候心跳的动画
//.h
#import <UIKit/UIKit.h>
@interface UIView (Pop)
- (void)popInsideWithDuration:(NSTimeInterval )duration;
@end
//.m
#import "UIView+Pop.h"
@implementation UIView (Pop)
- (void)popDuration:(NSTimeInterval)duration
{
__weak typeof(self) weakSelf = self;
self.transform = CGAffineTransformIdentity;
// start time and duration are values between 0.0 and 1.0 specifying time and duration relative to the overall time of the keyframe animation
[UIView animateKeyframesWithDuration:duration delay:0 options:0 animations:^{
[UIView addKeyframeWithRelativeStartTime:0 relativeDuration:1/4.0 animations:^{
typeof(self) strongSelf = weakSelf;
strongSelf.transform = CGAffineTransformMakeScale(0.8, 0.8);
}];
[UIView addKeyframeWithRelativeStartTime:1/4.0 relativeDuration:1/2.0 animations:^{
typeof(self) strongSelf = weakSelf;
strongSelf.transform = CGAffineTransformMakeScale(1.2, 1.2);
}];
[UIView addKeyframeWithRelativeStartTime:3/4.0 relativeDuration:1/4.0 animations:^{
typeof(self) strongSelf = weakSelf;
strongSelf.transform = CGAffineTransformMakeScale(1.0, 1.0);
}];
} completion:^(BOOL finished) {
}];
}
@end
获取设备的IP地址
需引入头文件
#import <ifaddrs.h>
#import <arpa/inet.h>
方法，返回值为IP
- (NSString *)getIPAddress
{
NSString *address = @"error";
struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;
// retrieve the current interfaces - returns 0 on success
success = getifaddrs(&interfaces);
if (success == 0) {
// Loop through linked list of interfaces
temp_addr = interfaces;
while(temp_addr != NULL) {
if(temp_addr->ifa_addr->sa_family == AF_INET) {
// Check if interface is en0 which is the wifi connection on the iPhone
if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
// Get NSString from C String
address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];
}
}
temp_addr = temp_addr->ifa_next;
}
}
// Free memory
freeifaddrs(interfaces);
return address;
}
在这儿可以找到
通过十六进制的字符串返回UIColor对象
方式一
/*!
* @method 通过16进制计算颜色
* @result 颜色对象
*/
- (UIColor *)colorFromHexRGB:(NSString *)inColorString
{
UIColor *result = nil;
unsigned int colorCode = 0;
unsigned char redByte, greenByte, blueByte;
if (nil != inColorString)
{
NSScanner *scanner = [NSScanner scannerWithString:inColorString];
(void) [scanner scanHexInt:&colorCode]; // ignore error
}
redByte = (unsigned char) (colorCode >> 16);
greenByte = (unsigned char) (colorCode >> 8);
blueByte = (unsigned char) (colorCode); // masks off high bits
result = [UIColor
colorWithRed: (float)redByte / 0xff
green: (float)greenByte/ 0xff
blue: (float)blueByte / 0xff
alpha:1.0];
return result;
}
方式二
#define UIColorFromHexRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]//UIColorFromHexRGB(0X4BAFF3)
